--- title: "R020: C/S R.020 Issue 1" description: "Official Cospas-Sarsat R-series document R020" sidebar: badge: text: "R" variant: "note" # Extended Cospas-Sarsat metadata documentId: "R020" series: "R" seriesName: "Reports" documentType: "report" isLatest: true documentDate: "October 2012" originalTitle: "C/S R.020 Issue 1" --- > **📋 Document Information** > > **Series:** R-Series (Reports) > **Date:** October 2012 > **Source:** [Cospas-Sarsat Official Documents](https://www.cospas-sarsat.int/en/documents-pro/system-documents) --- COSPAS-SARSAT LOUCH GEOSAR PERFORMANCE EVALUATION PLAN C/S R.020 Issue 1 LOUCH GEOSAR PERFORMANCE EVALUATION PLAN History Issue Revision Date Revised Pages Comments Issue 1 Submitted to CSC-49 TABLE OF CONTENTS Page 1. INTRODUCTION ..................................................................................................... 1-1 1.1 Purpose of Document .................................................................................................. 1-1 1.2 Background ................................................................................................................. 1-1 1.3 Responsibilities ........................................................................................................... 1-2 1.4 Schedule ...................................................................................................................... 1-3 2. LOUCH GEOSAR PERFORMANCE EVALUATION GOALS AND OBJECTIVES ................................................................................... 2-1 2.1 Performance Evaluation Goals .................................................................................... 2-1 2.2 Objectives .................................................................................................................... 2-1 3. LOUCH PERFORMANCE EVALUATION METHODOLOGY ....................... 3-1 3.1 General Evaluation Methodology ............................................................................... 3-1 3.2 Detailed Description of Objectives ............................................................................. 3-2 3.2.1 T-1: Processing Threshold, System Margin and Beacon Message Processing Performance ............................................................................... 3-2 3.2.2 T-2: Time to Produce Valid, Complete and Confirmed Messages ....................... 3-7 3.2.3 T-3: Carrier Frequency Measurement Accuracy ................................................ 3-10 3.2.4 T-4: Louch GEOLUT Channel Capacity ............................................................ 3-11 3.2.5 T-5: Impact of Interference ................................................................................. 3-13 3.2.6 T-6: Impact of Interference from LEOSAR Satellites ........................................ 3-15 3.2.7 T-7: Louch GEOLUT Network Performance ..................................................... 3-16 3.2.8 T-8: Processing Anomalies ................................................................................. 3-18 3.2.9 T-9: Louch Coverage .......................................................................................... 3-20 3.2.10 C-1: Commissioning of Louch GEOLUT ........................................................... 3-21 4. REPORTING GUIDELINES .................................................................................. 4-1 LIST OF FIGURES Figure 3-1: Graphs Depicting Processing Threshold, System Margin, Valid Message and Complete Long Message Processing Performance ..................................... 3-6 Figure 3-2: Graphs Depicting Message Production Times .................................................. 3-9 Figure 3-3: Graphs Depicting Frequency Measurement Accuracy Performance............... 3-11 Figure 3-4: Graph Depicting Louch GEOSAR Capacity ................................................... 3-13 Figure 3-5: Test Set-up for Interference Evaluation ........................................................... 3-14 Figure 3-6: GEOLUT Valid Message Production Performance ........................................ 3-17 Figure 3-7: GEOLUT Network Performance ..................................................................... 3-18 LIST OF TABLES Table 3-1: Sample Table for Analysed Results for Objective T-1 ...................................... 3-5 Table 3-2: Sample Table for Analysed Results for Objective T-2 ...................................... 3-8 Table 3-3: Sample Table for Analysed Results for Objective T-3 .................................... 3-10 Table 3-4: Sample Table for Capacity Statistics ............................................................... 3-12 Table 3-5: Sample Table of Louch GEOLUT Network Performance .............................. 3-16 Table 3-6: Sample Table of Coverage Statistics ............................................................... 3-21 LIST OF ANNEXES Annex A - Format of Louch Performance Evaluation Reports by GEOLUT Operators Annex B - Test Scripts for Objectives T-1, T-2 and T-3 Annex C - Test Scripts for Objective T-4 (Channel Capacity) Annex D - Test Scripts for Objectives T-6 and T-7 Annex E - Data to be Collected for Objectives T-1, T-2 and T-3 Annex F - Data to be Collected for Objective T-4 Annex G - Data to be Collected for Objectives T-6 and T-7 Annex H - Data to be Collected for Objective T-8 Annex I- Data to be Collected for Objective T-9 Annex J - Louch GEOSAR Performance Evaluation Programme Schedule 1 - 1 1. INTRODUCTION JSC "Academician M.F. Reshetnev" Information Satellite Systems" has installed 406 MHz Search and Rescue (SAR) repeaters on the Louch-5A meteorological geostationary satellite. The Louch-5A satellite was launched on 11th of December 2011 from Baikonur launch site with the interim subsatellite point of 95º E and the final destination of 167º E . The SAR payload on board of Louch-5A is a frequency translation repeater similar to that of MSG. This instrument will be made available for use in the Cospas-Sarsat GEOSAR system after the completion of initial satellite on-orbit tests. Representing a new part of Cospas-Sarsat GEOSAR, the performance of its SAR instrument needs to be evaluated and reported. In light of this, the Cospas-Sarsat Council expects that Louch GEOSAR performance evaluation programme should be conducted to: a. establish Louch GEOSAR / GEOLUT performance; and b. validate specification and commissioning requirements for GEOLUTs which operate with the Louch GEOSAR payload. 1.1 Purpose of Document The purpose of this document is to provide: a. test procedures for assessing the performance of GEOLUTs which operate with the Louch SAR instrument; b. guidelines for analysing the test results; and c. guidelines, procedures and schedule for managing the Louch GEOSAR performance evaluation programme and reporting the results. 1.2 Background From 1996 to 1998 Cospas-Sarsat conducted a demonstration and evaluation programme to determine the suitability of using satellites in geostationary orbit equipped with SAR instruments to process the signals from Cospas-Sarsat 406 MHz distress beacons. This programme, hereafter referred to as the GEOSAR D&E, was implemented using the GOES series of satellites provided by the USA, the INSAT-2 satellites provided by India, and experimental ground segment equipment provided by Canada, Chile, India, Spain and the United Kingdom. The GEOSAR D&E demonstrated that GEOSAR satellites provided a significant enhancement to the Cospas-Sarsat system. Following from this conclusion, in October 1998 the Cospas-Sarsat Council decided that the 406 MHz GEOSAR system components should be incorporated into the Cospas-Sarsat System as soon as possible. During the period that the GEOSAR D&E was being conducted, new GEOSAR repeaters were developed by EUMETSAT and installed on the MSG meteorological geostationary 1 - 2 satellite series. Since the technical characteristics of the MSG SAR instrument were different from SAR instrument on the GOES satellites, additional test were performed to establish MSG GEOSAR/ GEOLUT performance, and any special GEOLUT specifications and commissioning requirements. The results of these tests were approved by Cospas-Sarsat in October 2004. Following the deployment of a third type of 406 MHz GEOSAR payload onboard INSAT-3A by the Republic of India and the signature of an Understanding between the Cospas-Sarsat Programme and the Republic of India on the provision of Cospas-Sarsat GEOSAR services in February 2007, ISRO conducted an INSAT GEOSAR D&E test campaign including the commissioning of the Bangalore GEOLUT in 2009. The results of INSAT GEOSAR D&E evaluation were approved in October 2009 while the Bangalore GEOLUT was commissioned in early 2010. In 2011 an Electro GEOSAR performance evaluation test campaign took place following the launch of Electro-L – a Russian geostationary meteorological satellite that carried SAR equipment on board. It was manufactured by the Federal State Unitary Enterprise “Lavochkin Association” and launched on 20th February of 2011 by the Russian Federation. With the deployment of a new 406 MHz GEOSAR payload type on board of Louch satellites by the Russian Federation, there is a need to conduct tests with Cospas-Sarsat GEOLUTs to establish Louch GEOSAR / GEOLUT performance, and any special GEOLUT specification and commissioning requirements. The Cospas-Sarsat Council expects that the Louch performance evaluation programme should be based on the technical series of tests defined in the GEOSAR D&E Plan amended to address anticipated Louch performance. The administrations of New Zealand, Australia and USA have agreed to participate in the Louch GEOSAR performance evaluation programme. USA also announced that they would provide beacon simulator signals for some of the proposed tests. The commissioning of New Zealand GEOLUT is to be performed as part of the Louch performance evaluation test campaign. The Russian GEOLUT is planned to be deployed in the expected area of Louch-5A coverage zone and may participate in the Louch GEOSAR performance evaluation programme, subject to the completion of all on-site tests and performance validation. 1.3 Responsibilities JSC “Russian space systems” will be responsible for assessing the performance of the Louch SAR payload and will be responsible for confirming the operational status of the SAR payload during the test period. Operators of GEOSAR ground stations participating in the Louch GEOSAR performance evaluation campaign will be responsible for conducting the tests as described herein, and to produce a report in the format specified at Annex A for the consideration of the Cospas- Sarsat Joint Committee. 1 - 3 1.4 Schedule The chart in Annex J provides the major milestones of the Louch GEOSAR Performance Evaluation Programme. - END OF SECTION 1 - 2 - 1 2. LOUCH GEOSAR PERFORMANCE EVALUATION GOALS AND OBJECTIVES 2.1 Performance Evaluation Goals The goals of the performance evaluation programme are to: a. characterize the technical performance of the Louch GEOSAR system and confirm that SAR payload and GEOLUT systems are effective for providing useful 406 MHz alert data; and b. validate specification and commissioning requirements for GEOLUTs which will operate with the Louch-5A satellite. 2.2 Objectives The programme has been subdivided into specific objectives. Each objective is addressed by conducting specific tests and analysing the results. Most of the tests require a beacon simulator whose power output and message content can be controlled and varied. The tests will be conducted over several weeks to collect enough data to provide statistically valid results. An overview of each objective is listed below, the detailed descriptions of these objectives are provided in section 3.2. T-1 Processing Threshold, System Margin, and Beacon Message Processing Performance Determine the processing threshold, processing performance, system margin and the performance in respect of long format beacon messages for GEOLUTs which operate with the Louch payload. The beacon test signals used to assess these parameters do not include beacon messages that collide with each other. T-2 Time to Produce Valid and Confirmed Messages Determine the statistical distribution of the time required for the GEOLUT to produce valid and confirmed beacon messages. The beacon test signals used to assess this parameter do not include beacon messages which collide with each other. 2 - 2 T-3 Carrier Frequency Measurement Accuracy Determine how accurately the beacon carrier frequency can be determined by the Louch GEOSAR / GEOLUT system. The beacon test signals used to assess this parameter do not include beacon messages which collide with each other. T-4 Louch GEOLUT Channel Capacity Assess the capability of the GEOSAR system to handle multiple simultaneously active distress beacons in a single 406 MHz channel. This parameter is assessed by generating traffic loads which include beacon messages which collide with each other. T-5 Impact of Interference Monitor the band for the presence of interference while the tests are being performed, in order to understand any anomalies in the results and to illustrate the ability of the GEOSAR system to provide valid messages in the presence of interference and noise in the frequency bands used by the Louch GEOSAR system. T-6 Impact of Interference From LEOSAR Satellites Assess the impact of interference from LEOSAR satellite downlink signals on the ability of the GEOLUT to produce valid and confirmed alert messages. T-7 Louch GEOLUT Network Performance To verify that although at any given time some GEOLUTs may be affected by interference from the LEOSAR system, expected GEOSAR alerts will be reliably provided by other GEOLUTs in the Louch ground segment. T-8 Processing Anomalies Assess the performance of the GEOLUT in respect of the production of processing anomalies. T-9 Louch Coverage Estimate the geographic coverage of the Louch GEOSAR system. C-1 Commissioning of Louch GEOLUT Verify the compliance of Louch GEOLUT (for all Louch performance evaluation test participants that intend to commission their LUTs) to the Cospas-Sarsat performance and design guidelines (specified in C/S T.009) by performing the tests specified in the GEOLUT Commissioning Standard (C/S T.010) and reporting results in the appropriate format to the Cospas-Sarsat Joint Committee for evaluation. - END OF SECTION 2 - 3 - 1 3. LOUCH PERFORMANCE EVALUATION METHODOLOGY 3.1 General Evaluation Methodology All participants in the Louch GEOSAR performance evaluation programme are requested to conduct their testing and evaluation in accordance with the common set of guidelines and procedures as defined below. a. Russia is responsible for scheduling, in conjunction with the GEOLUT operators, all the tests that require the support of the beacon simulator. b. Prior to conducting any tests that do not require the simulator, the participating GEOLUT operators should liaise with Russia to confirm that there are no reported problems with the satellite which could affect test results. c. Each GEOLUT operator should produce a Louch GEOSAR Performance Evaluation Report in the format described at Annex A. d. Distress alerts from operational beacons generated by GEOLUTs participating in the Louch evaluation programme should not be released into the Cospas-Sarsat System until the respective GEOLUT operator has confirmed that the GEOLUT does not produce processing anomalies. ________________________________________________________________________ Every effort should be made to ensure that the use of real or simulated beacon signals in support of the Louch Performance Evaluation Plan will not generate distress alert messages which might be interpreted in the existing LEOSAR and GEOSAR systems as real alerts. _________________________________________________________________________ 3 - 2 3.2 Detailed Description of Objectives This section provides the following for each objective of the Louch GEOSAR Performance Evaluation Programme: a. test procedures, b. data collection requirements, and c. data reduction/analysis requirements. To simplify the testing and to reduce the number of 406 MHz test transmissions, test procedures have been developed which share test transmissions. For example the output produced by the GEOLUT resulting from the test transmissions for test T-1, is also used for evaluating the performance of the GEOLUT in respect of the time to produce valid and confirmed messages (T-2), and frequency measurement accuracy performance (T-3). To ensure that the alert messages generated by the GEOLUTs can be correlated to the test signal transmissions, GEOLUT operators should confirm that the time of day setting in the GEOLUT is correct before conducting each test. 3.2.1 T-1: Processing Threshold, System Margin, and Beacon Message Processing Performance The processing threshold, processing performance and the system margin are "figures of merit" of the GEOLUT. Processing Threshold The processing threshold is the value of the minimum carrier to noise density ratio (C/No) in dBHz at the GEOLUT processor for which the GEOLUT is able to produce a valid1 message for 99% of the beacon events (the lower this value the more sensitive the GEOLUT). System Margin The system margin is the difference between a nominal beacon, with an EIRP of 37 dBm, and a beacon operating at the GEOLUT threshold. Valid Message Processing Performance The processing performance requirement documented in C/S T.009 is that GEOLUTs should be capable of producing valid messages within 5 minutes of beacon activation 95% of the time, for all beacon signals whose C/No as measured at the GEOLUT is greater than 26 dB-Hz. This test will determine the C/No, for which the Louch GEOLUT can produce a valid message for beacon event within 5 minutes of beacon activation 95% of the time. Long Message Processing Performance At present Cospas-Sarsat has no GEOLUT specification requirement in respect of producing complete and confirmed long messages. Nevertheless, with the increased use of location 1 - Definitions of Valid, Complete and confirmed messages are provided in C/S T.009"Cospas-SarsatGeolut Performance Specification and Design Guidelines". 3 - 3 protocol beacons using the long message format, it is necessary to assess the Louch system performance in this regard. 3.2.1.1 Methodology and Data Collection This test assesses the GEOLUT performance in respect of its ability to produce single valid, complete and confirmed complete distress beacon messages as a function of the beacon power transmitted in the direction of the Louch satellite (beacon EIRP). A beacon simulator is used to replicate distress beacons that transmit long format messages at specific EIRPs, for a duration necessary to transmit 25 bursts for each beacon ID. Hereafter the term “beacon event” is used to describe a beacon being active for a period of time. The test is conducted by transmitting 50 beacon events for each EIRP, whilst ensuring that signals from individual beacon events do not overlap in time and frequency with the signals from other beacon events. The output of the GEOLUT is monitored and the information identified in Table E-1 is recorded. The procedure is repeated at EIRP values ranging from 37dBm to 26 dBm, in one dB increments. Performance of this test requires the following steps. a. Use a beacon simulator as a set of controlled test beacons with a variable output EIRP. b. Program the simulator to provide different long format beacon identification codes for each beacon event. The test scripts used for this test are provided at Annex B, Table B-1. c. Calibrate the beacon simulator output EIRP and carrier frequency (to an accuracy of 0.2 Hz) to confirm the technical characteristics of the transmitted signals. d. To avoid interference to the 406 MHz channels currently active for operational use, ensure that the simulator does not transmit in the channels used for operational beacons. e. Set the simulator EIRP to 37 dBm in the direction of the Louch-5A satellite. f. Transmit the 50 beacon events provided at Table B-1 (each event consists of the same beacon message transmitted 25 times), ensuring that individual beacon transmissions do not interfere with each other. To eliminate any potential interference from LEOSAR satellite downlinks, this test shall be scheduled to ensure that test signals are not transmitted when Louch GEOLUTs are in the footprint of a Cospas-Sarsat LEOSAR satellites. 3 - 4 g. Collect the data produced by the GEOLUT for each beacon event as described at Annex E (note that this data will be analysed to provide the results for this test objective, as well as for objectives T-2 and T-3). h. Repeat the process at the EIRP values listed at Table 3-1, using the associated test scripts described at Table B-1. 3.2.1.2 Data Reduction, Analysis and Results For each set of 50 beacon events transmitted at a given EIRP as recorded at Annex E Table E-1: a. Calculate the probability of: (i) producing at least one valid message for each beacon event as follows: d EIRP he selecte itted at t nts transm beacon eve number of essage ne valid m at least o produced ich GEOLUT nts for wh beacon eve number of (ii) producing at least one valid message within 5 minutes of beacon activation as follows: d EIRP he selecte itted at t nts transm beacon eve number of tion of activa min in ssage with a valid me produced ich GEOLUT nts for wh beacon eve number of (iii) producing at least one complete beacon message as follows: d EIRP he selecte itted at t nts transm beacon eve number of e ong messag complete l a correct produced ich GEOLUT nts for wh beacon eve number of (iv) producing a confirmed complete beacon message as follows: d EIRP he selecte itted at t nts transm beacon eve number of sage e long mes a complet to confirm was able ich GEOLUT nts for wh beacon eve number of b. Calculate the C/No at the GEOLUT processor corresponding to each EIRP. Note that this is a calculated theoretical value of C/No, not the value measured by the GEOLUT. c. Record the results of the calculations above in sample Table 3-1. d. Using the data from Table 3-1, produce graphs of the results as depicted at Figure 3-1. 3 - 5 EIRP from simulator (dBm) Calculated C/No at GEOLUT (dBHz) Number of Beacon Events Used (Valid Msg Sample Set) Number of Beacon Events for which Probability of Valid Message Probability of Valid Message within 5 Min Valid Message was Produced Valid Message was Produced within 5 Min 26.0 27.0 28.0 29.0 30.0 31.0 32.0 33.0 34.0 35.0 36.0 37.0 1.00 1.00 EIRP from simulator (dBm) Number of Beacon Events Used (Complete Msg Sample Set) Number of Beacon Events Used (Confirmed Complete Msg Sample Set) Number of Beacon Events for which a Complete Message was Produced Number of Beacon Events for which a Confirmed Complete Message was Produced Probability of Complete / Confirmed Complete Msg 26.0 27.0 28.0 29.0 30.0 31.0 32.0 33.0 34.0 35.0 36.0 37.0 1.00 1.00 / 1.00 Table 3-1: Sample Table for Analysed Results for Objective T-1 3 - 6 Figure 3-1: Graphs Depicting Processing Threshold, System Margin, Valid Message and Complete Long Message Processing Performance All cases where the GEOLUT was not able to produce a valid message for a beacon event should be analysed to determine if extraordinary external factors (e.g. interference) could have caused the GEOLUT not to detect the beacon. If extraordinary external factors caused the GEOLUT to miss a beacon event, the event should be removed from the statistics and an explanation provided in the report. Processing Threshold and System Margin C/No EIRP 37 dBm Processing Threshold System Margin 1.0 .99 .98 .97 .96 Probability of Valid Message Valid Message Processing Performance C/No EIRP Processing Performance 1.0 .99 .98 .97 .96 .95 Probability of Valid Message Within 5 min Long Message Processing Performance C/No EIRP Confirmed Complete Single Complete 1.0 .99 .98 .97 .96 .95 Probability of Successful Message Processing 3 - 7 3.2.2 T-2: Time to Produce Valid, Complete and Confirmed Messages This test assesses how long it takes GEOLUTs operating with the Louch satellite to produce valid beacon messages, complete long messages, and confirmed complete long messages. This information will be used to validate message processing requirements for GEOLUTs which operate with the Louch-5A satellite, and to determine a figure of merit for the number of bursts required to successfully process a message. 3.2.2.1 Methodology and Data Collection For simplicity this test is conducted by analysing the data collected for test T-1 (Threshold). Note that the T-1 test scenario is specifically designed not to generate beacon bursts which overlap in time and frequency. Consequently, for operational beacon events, the times to produce valid, complete, and the time to confirm complete messages may differ from those determined during this test. The following test methodology and data collection requirements apply: a. Note the EIRP and 15 Hex ID for each beacon event. b. For each beacon event note the date/time that the GEOLUT produced: (i) the first valid message; (ii) the first complete message; and (iii) the first confirmation of the complete message with an independent integration process. c. Record the data collected above in tabular format as described at Annex E. The table should have an entry for each beacon event at each EIRP. 3.2.2.2 Data Reduction, Analysis and Results a. For each EIRP calculate the average time to: (i) produce valid messages (ATVM), as follows: produced id message st one val ich at lea nts for wh beacon eve number of sage valid mes to produce or GEOLUT on event f st in beac first bur time after ATVM  = (ii) produce complete messages (ATCM), as follows: ed age produc plete mess st one com ich at lea nts for wh beacon eve number of message complete to produce or GEOLUT on event f st in beac first bur time after ATCM  = 3 - 8 (iii)confirm a complete messages (ATCCM), as follows: ed age produc plete mess st one com ich at lea nts for wh beacon eve number of message complete to produce or GEOLUT on event f st in beac first bur time after ATCM  = b. In addition, for each EIRP calculate the standard deviation for the time to produce valid, complete and confirmed complete messages. c. For each EIRP determine the time (duration) required for the GEOLUT to provide 95% and 98% of valid, complete, and confirmed complete messages. These values are determined by normalising the time values by removing the time bias resulting from the requirement to stagger the start times of each beacon event. The normalised values are analysed to identify how long the GEOLUT required to produce the 95th and 98th percentile for valid, complete, and confirmed messages. If the 95th or 98th percentile was not achieved for any given category, this should be designated as Not Available (N/A) in the appropriate cell of the table. d. Record the results of the above in sample Table 3-2. e. Using the data from Table 3-2, produce graphs of the results as depicted in Figure 3-2. EIRP (dBm) C/No (dBHz ) ATVM (Sec) Standard Deviation of ATVM ATCM (Sec) Standard Deviation of ATCM ATCCM (Sec) Standard Deviation of ATCCM 26.0 27.0 . . . 37.0 EIRP (dBm) C/No (dBHz) 95th Percentile 98th Percentile Valid Msg (Sec) Complete Msg (Sec) Confirmed Msg (Sec) Valid Msg (Sec) Complete Msg (Sec) Confirmed Msg (Sec) 26.0 27.0 . . . 37.0 Table 3-2: Sample Table for Analysed Results for Objective T-2 3 - 9 Figure 3-2: Graphs Depicting Message Production Times Average Time to Produce Valid, Complete and Confirmed Complete Messages C/No EIRP Confirmed Complete (ATCCM) Complete (ATCM) 300 350 400 450 500 550 600 Seconds After First Burst of Beacon Event Number of Bursts Required Valid (ATVM) 95th Percentile to Produce Valid, Complete and Confirmed Complete Messages C/No EIRP Confirmed Complete Complete 300 350 400 450 500 550 600 Seconds After First Burst of Beacon Event Number of Bursts Required Valid 98th Percentile to Produce Valid, Complete and Confirmed Complete Messages C/No EIRP Confirmed Complete Complete 300 350 400 450 500 550 600 Seconds After First Burst of Beacon Event Number of Bursts Required Valid 3 - 10 3.2.3 T-3: Carrier Frequency Measurement Accuracy The purpose of this objective is to assess how accurately the beacon carrier frequency can be measured by the Louch GEOSAR / GEOLUT system. This is accomplished by comparing the beacon's carrier frequency for each valid message as measured by the GEOLUT with the known frequency value for the same beacon, provided by the beacon simulator operator. The current GEOLUT specification (C/S T.009) requires a frequency measurement accuracy of 2 Hz. 3.2.3.1 Methodology and Data Collection For simplicity, this test is conducted by analysing the data collected for test T-1. For each beacon event note the frequency measurement provided by the GEOLUT associated with the first valid message produced, and record this information as described at Annex E. The measured frequency should be corrected by the GEOLUT, as possible, to account for any calibration that would normally be performed during real GEOLUT operations (e.g. if the GEOLUT includes features for assessing and correcting frequency measurements by applying calibration correction factors, these features should be activated). 3.2.3.2 Data Reduction, Analysis, and Results Using the data recorded at Annex E the mean and standard deviation of the frequency differences for each EIRP should be calculated and recorded as indicated in sample Table 3-3 and graphed as depicted at Figure 3-3. Measurements which have large differences may be removed from the data set if the measurement error can be explained by a known phenomenon which degraded the GEOLUT's ability to produce a valid measurement. EIRP (dBm) Calculated C/No at GEOLUT (dBHz) Avg Freq Measurement Error (Hz rounded to 1 decimal place) Std Deviation of Error (Hz) 26.0 . . 37.0 Table 3-3: Sample Table for Analysed Results for Objective T-3 3 - 11 Figure 3-3: Graphs Depicting Frequency Measurement Accuracy Performance 3.2.4 T-4: LOUCH GEOLUT Channel Capacity The definition of capacity in Cospas-Sarsat GEOSAR systems is the number of 406 MHz distress beacons operating simultaneously in the field of view of a GEOSAR satellite, that can be successfully processed by the System to provide a valid beacon message, under nominal conditions, within 5 minutes of beacon activation 95% of the time, and the number of beacons that can be successfully processed within 10 minutes of beacon activation 98% of the time. The applicable nominal conditions are described in document C/S T.012, “Cospas- Sarsat 406 MHz Frequency Management Plan”, except that the uplink EIRP will be set to 34 dBm. 3.2.4.1 Methodology and Data Collection The Louch GEOSAR channel capacity is determined by generating traffic loads equivalent to known numbers of simultaneously active long format beacons in a Cospas-Sarsat 406 MHz channel. The time required for the GEOLUT to produce a valid beacon message, complete message and confirm a complete message for each beacon event is recorded. The number of simultaneously occurring beacon events is changed and the time required for the GEOLUT to produce valid, complete and complete confirmed messages are calculated and recorded for the new 406 MHz traffic load. The test scripts transmitted by the beacon simulator should conform to the nominal conditions detailed in document C/S T.012, with the exception that the uplink EIRP will be 34 dBm. Specifically, the test shall replicate a number of beacon messages overlapping in time and frequency commensurate with the number of simultaneously active beacons. Further, the beacon events used in the test script shall also replicate the beacon burst repetition period defined in document C/S T.001 (406 MHz beacon specification). The test shall be scheduled to avoid any potential interference caused by Cospas-Sarsat LEOSAR satellite downlink transmissions. The test will replicate scenarios of 15, 20, 25 and 30 simultaneously active beacons. 26 27 … EIRP Avg Freq Measurement Error (Hz) Standard Deviation Measurement Error (Hz) … EIRP 3 - 12 Performance of this test requires the following steps. a. A beacon simulator test script is developed which replicates 15 simultaneously active beacons, with each beacon event having a unique ID. The time of the first burst for each beacon event should be developed using a random process that ensures that the first burst of each beacon is transmitted within 50 seconds from the start of the test. The transmit time for subsequent transmissions for each beacon event shall conform to the repetition period defined in the Cospas-Sarsat beacon specification (C/S T.001). Therefore, the test script will include instances where beacon bursts may overlap in time and frequency. The test signals will be transmitted with a carrier frequency of 406.063MHz with the uplink power set to 34 dBm. Each beacon event shall replicate a beacon being active for a 15 minute period. b. Ensuring that the GEOLUTs will not be in the downlink footprint of a Cospas-Sarsat LEOSAR satellite, the test script is transmitted. c. For each beacon event the time that the GEOLUT produced the first valid message, first complete message and first confirmed complete message should be recorded in the tabular format provided at Annex F. d. Repeat test with a different test script which also replicates 15 active beacons, until 10 different test scripts have been transmitted. e. Repeat the process above for scenarios in which the beacon simulator replicates 20, 25, and 30 simultaneously active beacons. 3.2.4.2 Data Reduction, Analysis and Results Using the data collected at Annex F, Table 3-4 should be completed for each simulated traffic load (e.g. the 10) repetitions of the test script for 15 active beacons are consolidated to provide the data in a single row of the table). Channel: 406.0XX # of Active Bcn Events % Valid Msg within 5 Min % Valid Msg within10 Min % Valid Msg within 15 Min % Confirmed Complete Msg within 15 Min Table 3-4: Sample Table for Capacity Statistics From the data in Table 3-4, the percentage of beacon events which produced valid messages within 5, 10 and 15 minutes of the start of the beacon event, and also the percentage of confirmed complete messages, should be graphed against the respective beacon channel population as indicated at Figure 3-4. As described below, the capacity of the channel is determined by evaluating the number of active beacons corresponding to the 95th percentile 3 - 13 of the 5 minute curve and the 98th percentile of the 10 minute curve. Since the capacity of the channel must satisfy both the 5 and 10 minute criteria, the lowest of these two figures is the channel capacity. Figure 3-4: Graph Depicting Louch GEOSAR Capacity In the fictitious example above, the 0.95 probability in 5 minutes would be the most stringent criteria, and, therefore, defines the capacity as being approximately 26.5 active beacons. 3.2.4.3 Interpretation, Conclusion and Recommendation The results of these tests will provide an estimate of the capacity a single channel in the Louch GEOSAR system. It is recommended that these results be used to validate the GEOLUT capacity models being developed for the 406 MHz Frequency Management Plan. 3.2.5 T-5: Impact of Interference The purpose of this objective is to determine the ability of the GEOSAR system to provide valid messages in the presence of interference and noise. In view of the specialized test equipment required to conduct this objective, not all Louch GEOLUT operators need participate, but as a minimum one operator should monitor and report the impact of interference in accordance with these procedures. 0.94 0.95 0.96 0.97 0.98 0.99 1.0 5 Minute Valid Msg Curve 10 Minute Valid Msg Curve 15 Minute Valid Msg Curve 15 Minute Confirmed Complete Msg Curve Probability Number of Simultaneously Active Beacons Per Channel 3 - 14 3.2.5.1 Methodology and Data Collection This objective will use both real alerts and controlled test beacons to determine the impact of actual interferers seen in the GEOSAR field of view when interference is present. It will also examine the relationship between the characteristics of the interfering signals and any changes in the production of valid messages. The following methodology should be used. a. Characterize the interference by using a spectrum analyser and a data storage device to permit detailed analysis of the interfering signal at a later time than its occurrence. The following test set up could be used (see Figure 3-5): b. Monitor the GEOSAR band using the spectrum analyser. Record the output in a storage device for later detailed analysis. Photographs, data plots, or spectrographs could be used for this purpose. c. When interference is detected the following parameters concerning the interfering signal should be collected. i) The identification of the GEOLUT. ii) Time of occurrence and the duration of the interfering signal. iii) Spectral occupancy. LUCH-5A SATELLITE SIGNAL ELECTRO GEOLUT PROCESSOR SPECTRUM ANALYZER STORAGE DEVICE ALERT MESSAGES INTERFERER CHARACTERIZATION DATA PHOTOGRAPHS, PLOTS, OR SPECTOGRAPHS Figure 3-5: Test Set-up for Interference Evaluation Louch 5A Louch 5A 3 - 15 iv) Signal strength. v) Time patterns (e.g. on/off versus continuous, sweeping versus constant, etc.). vi) Nature of modulation (analogue versus digital). vii) Location of the interferer (if known). During periods of interference the production of valid messages by the GEOSAR processor should be evaluated. Any loss of messages, the production of invalid messages or increases in the message transfer time should be noted. 3.2.5.2 Data Reduction, Analysis and Results When interference is detected, all GEOSAR messages during the period should be examined to determine if there is: a. a loss of expected messages; b. a decrease in the number of valid messages from operational and test beacons before and after the occurrence of the interference; and c. an increase in processing anomalies. Examine the technical parameters of the interferer and try to relate the impact on the message processing to specific characteristics of the interferer. For example, is there a relationship between the rate of reduction in valid messages to the interferer's signal strength? 3.2.6 T-6: Impact of Interference From LEOSAR Satellites The purpose of this objective is to analyse and quantify the impact that Cospas-Sarsat LEOSAR satellite downlink transmissions have on the ability of Louch GEOLUTs to process beacon signals. The test transmissions used for this objective will also be used for objective T-7 (Louch GEOLUT network performance). 3.2.6.1 Methodology and Data Collection The impact of interference from LEOSAR satellite downlink transmissions is assessed by activating beacon events at regular intervals over extended periods of time. The performance of the GEOLUT to produce valid and confirmed messages for these beacon events during periods when the GEOLUT was within, and periods when not within a LEOSAR satellite footprint, is analysed. It should be noted that harmful interference does not always occur every time GEOLUTs are in the footprint of the LEOSAR satellites, since the level of interference is dependant on many factors (e.g. side lobe characteristics of GEOLUT antenna, GEOLUT antenna shielding, etc.). Consequently, this test will not categorically confirm whether LEOSAR satellites generate harmful interference to the Louch GEOSAR System. 3 - 16 However, the test may provide sufficient information to determine whether additional tests on the matter will be required. Performance of this test requires the following steps. a. The beacon simulator is programmed to transmit a new beacon event, each with an EIRP of 37 dBm every 10 minutes over a 48 hour period. Each beacon event shall have a unique ID, transmit long format messages and shall be active for 20 minutes. The burst repetition interval for each beacon event shall be implemented in a manner which ensures that at least 10 bursts from each event do not collide with bursts from 3.2.7 T-7: LOUCH GEOLUT Network Performance There is a requirement to confirm that the Louch GEOSAR system comprised of the GEOSAR satellite and the network of GEOLUTs which track it will provide reliable and timely 406 MHz alerts even if one or more of the Louch GEOLUTs were unavailable due to interference from LEOSAR downlink transmissions. 3.2.7.1 Methodology and Data Collection The results from objective T-6 from all the participating GEOLUTs is analysed to complete the table provided below. For each beacon event the earliest time that any of the GEOLUTs produced a valid message and the earliest that any of the GEOLUTs produced a confirmed complete message is recorded. Since this test requires consolidating the results from objective T-6 from all the participating Louch GEOLUTs, objective T-7 will not be included in the performance evaluation reports provided by individual GEOLUT operators. Beacon ID Time to Produce Valid Msg GEOLUT which Produced Valid Msg Time to Produce Confirmed Complete Msg GEOLUT which Produced Confirmed Complete Msg Table 3-5: Sample Table of Louch GEOLUT Network Performance 3.2.7.2 Data Reduction, Analysis and Results From the data collected, the following shall be provided. a. A histogram, with 100 second intervals, depicting the number of beacon events for which valid and confirmed complete messages were produced, and the cumulative probabilities of valid and confirmed complete messages (as provided at Figure 3-7). b. The mean time and standard deviation for the Louch GEOSAR system to produce valid and confirmed complete messages. 3 - 17 c. The probability that the combined network of GEOLUTs would produce a valid message within 5 minutes, and within 10 minutes. Figure 3-6: GEOLUT Valid Message Production Performance Seconds x 100 (after start of beacon event) Number of beacon events for which GEOLUT produced a valid message (no possibility of LEOSAR interference prior to first valid message). Number of beacon events for which GEOLUT produced a valid message (possible LEOSAR interference prior to first valid message). Cumulative Probability of valid message (no possibility LEOSAR interference prior to first valid message). Cumulative Probability of valid message (possible LEOSAR interference prior to first valid message). Number of Beacon Events Cumulative Probability 3-4 1-2 0-1 4-5 8-9 2-3 6-7 5-6 7-8 9-10 3 - 18 Figure 3-7: GEOLUT Network Performance 3.2.8 T-8: Processing Anomalies (PA) This test assesses GEOLUT performance in respect of its ability to suppress the number of processing anomalies produced. 3.2.8.1 Methodology and Data Collection This test is conducted by monitoring the 406 MHz channel (406.022 MHz) used by Cospas- Sarsat reference beacons, and noting instances where the GEOLUT produced valid beacon 0-1 4-5 2-3 3-4 1-2 7-8 6-7 8-9 Number of Beacon Events Cumulative Probability Number of beacon events for which one of the Louch GEOLUTs produced the first valid message within the time interval. Number of beacon events for which one of the Louch GEOLUTs produced the first confirmed message within the time interval. Cumulative Probability of the valid message being produced by at least one of the Louch GEOLUTs. Cumulative Probability of confirmed message being produced by at least one of the Louch GEOLUTs. Seconds x 100(after start of beacon event) 9-10 5-6 3 - 19 messages which did not correspond to any of the reference beacons in the coverage area of the Louch satellite. Since the identifications (IDs) of all reference beacons in view of the Louch satellite are known, it can be inferred that beacons detected in the 406.022 MHz channel which do not correspond to known reference beacons are processing anomalies. The following test methodology and data collection requirements apply: a. Note the 15 hexadecimal identification of all the reference beacons in the coverage area of the Louch satellite. b. Monitor the 406 MHz channel used by Cospas-Sarsat reference beacons for a 4 week period, and note each instance of the GEOLUT producing a processing anomaly. For each processing anomaly note the date and time that it was produced by the GEOLUT, the 15 Hex ID and the 30 Hex beacon message reported by the GEOLUT, and whether there was interference from a LEOSAR satellite at the time the PA was produced (an example of the table for collecting this data is provided at Annex H). 3.2.8.2 Data Reduction, Analysis and Results a. Identify those valid messages that were processing anomalies (their 15 Hex ID did not correspond to the 15 Hex ID of any of the reference beacons in the coverage area of the Louch satellite). b. For each processing anomaly, determine if the GEOLUT was in the coverage area of a LEOSAR satellite at the time the alert was produced. This information will be used to develop statistics which will provide an indication of whether LEOSAR interference impacts upon GEOLUT processing anomaly performance. c. For each processing anomaly, attempt to determine the source (i.e. reference beacon) of the transmission. This is done by converting the GEOLUT produced message into its binary representation, and comparing it with bit-shifted versions of all the reference beacons in the Louch coverage area. If the bits of the processing anomaly message correspond to 80% or more of a reference beacon message, then it could be assumed that the processing anomaly was generated from the GEOLUT processing of transmissions from that reference beacon. d. Record the results in the table provided at Annex H, and copied below: 15 Hex ID Produced by GEOLUT 15 Hex ID of Associated Reference Beacon Beacon Message Produced by GEOLUT (30 Hex) Date / Time LUT in LEO Footprint (Y/N) e. Calculate the PA rate as a function of beacon bursts in the coverage area of the Louch satellite. This is calculated with the following equation: Total Number of PAs Total Duration of LEOCov in Days* Number of Reference Beacon Bursts per Day in Louch Coverage Area f. Calculate the PA rate when the GEOLUT is in the footprint of a LEOSAR satellite using the following equation. 3 - 20 Total Number of PAs during LEOCov Total Duration of LEOCov in Days* Number of Reference Beacon Bursts per Day in Louch Coverage Area 3.2.9 T-9: LOUCH Coverage The coverage of the Louch GEOSAR system is evaluated using a combination of: a. technical tests, in which a beacon is activated for a period of time, during which it crosses in or out of the Louch GEOSAR coverage area; and b. evaluating real beacon alerts detected by the LEOSAR system, and assessing if the same alerts were detected by the Louch GEOSAR system. 3.2.9.1 Methodology and Data Collection Testing Using Beacon Crossing Coverage Area A beacon will be mounted on a vessel or vehicle which will be crossing the expected Louch GEOSAR coverage area. After the beacon has been activated, the beacon operator will record its location as a function of time. Louch GEOLUT operators will monitor the output of their GEOLUTs for the test period, and record the times associated with the production of all valid messages for the test beacon. Evaluating Coverage Area Using Real Beacon Events of Opportunity The location and times of real beacon events detected by the LEOSAR system during the period of the Louch GEOSAR Performance testing are to be identified. Beacon events located within an area enclosed by 80 latitude and longitude should be recorded in the format provided at Annex I. The beacon ID and time of each alert in the sample set are to be compared against the GEOLUT output to determine if the event was also detected by the Louch GEOSAR system. 3.2.9.2 Data Reduction, Analysis and Results Testing Using Beacon Crossing Coverage Area From the data collected, the time that Louch GEOSAR coverage was lost (or began depending whether the beacon was moving in or out of coverage) is to be recorded. The movement of the beacon during the test period is to be plotted on a map, and the plot is to be annotated to depict GEO coverage / no GEO coverage. From the collected data, the estimated latitude and longitude of the last valid message detected by the GEOLUT before the beacon left coverage, should be provided. Evaluating Coverage Area Using Real Beacon Events of Opportunity a. All the LEOSAR alerts detected during the period of the Louch Performance evaluation that satisfy the criteria for inclusion in the sample set should be recorded in 3 - 21 the format provided at Annex I (i.e., situated within an area enclosed by 80 latitude and longitude); b. Each beacon event in the sample set should be checked to determine if it was also detected by the Louch GEOLUT, and the results recorded as per Annex I; c. The beacon events are to be grouped into geographic areas of 10 latitude/longitude blocks; d. For each block, the percentage of LEOSAR beacon events that were also detected by the GEOLUT should be calculated and presented as indicated at Table 3-6 below; and e. The location of each beacon event should be plotted on two maps, one depicting events that were detected by both the LEOSAR and GEOLUT, and a separate map depicting beacon events detected only by the LEOSAR system. Block Location Number of LEOSAR Beacon Events Number Detected by GEOLUT % Detected by GEOLUT Longitude Latitude 0/10w 0/10n 10w/20w 0/10n 20w/30w 0/10n . . . . . . 70e/80e 70s/80s Table 3-6: Sample Table of Coverage Statistics 3.2.10 C-1: Commissioning of Louch GEOLUT Part of the Louch GEOSAR performance evaluation plan includes the verification of the compliance of Louch GEOLUT with the performance specification (C/S T.009). This verification is performed for those ground segment operators participating in test campaign that intend to commission their respective Louch GEOLUTs (New Zealand, Russia) to Cospas-Sarsat. Document C/S T.010 provides the detailed testing and reporting requirements for the commissioning of the Cospas-Sarsat GEOLUT. The annexes of the documents define the test data format requirements and the content and format of the commissioning report which is to be submitted to the Cospas-Sarsat Secretariat. Commissioning reports are reviewed separately by the Cospas-Sarsat Joint Committee and approved by the Cospas-Sarsat Council. - END OF SECTION 3 - 4 - 1 4. REPORTING GUIDELINES Each GEOLUT operator participating in the Louch GEOSAR Performance Evaluation Programme shall submit an individual report to the Cospas-Sarsat Secretariat. The report should follow the structure described in Annex A, using the same section paragraph numbering and annexes. The Secretariat will retain the complete reports on file for archival purposes, and will format each report into a summarized version for presentation to the Joint Committee. Based upon the recommendations of the Joint Committee, a summary report of the performance of the Louch System will be produced for the consideration of the Cospas-Sarsat Council. - END OF SECTION 4 - ________________________________________________________ ANNEXES TO THE COSPAS-SARSAT LOUCH GEOSAR PERFORMANCE EVALUATION PLAN _________________________________________________________ A - 1 ANNEX A FORMAT OF LOUCH PERFORMANCE EVALUATION REPORTSBY GEOLUT OPERATORS A.1 INTRODUCTION Introductory remarks provide information necessary to understand the report. The introduction should identify which test objectives were completed and have been reported in this document and any known deficiencies with the GEOLUT which could affect the results. Furthermore, the introduction shall provide: a. the dates covered by the test programme; b. the location of the GEOLUT; and c. the configuration settings of the GEOLUT which could impact upon its observed performance (e.g. the bandwidth settings of the GEOLUT receiver). A.2 SUMMARY OF RESULTS This section will provide summary statements concerning the results of each objective. It should specifically identify any difficulties experienced with the evaluation programme and any recommendations that should be noted by the Joint Committee. A.3 Test T-1: PROCESSING THRESHOLD, SYSTEM MARGIN ANDBEACON MESSAGE PROCESSING PERFORMANCE A.3.1 Test Description This section should include a statement confirming that the tests were conducted and analysed in accordance with C/S R.020, or describe any modifications to the test procedures that were required. A.3.2 Calculation of C/No The calculations converting the EIRP of the simulator, to a C/No value at the GEOLUT processor should be provided. A.3.3 Test Results The GEOLUT data collected for this test should be included as an annex to the report, and referenced in this section of the report. In addition, the tables below should be produced based on the collected data and provided in this section of the national report. A - 2 Analysed Data for Test T-1 EIRP from simulator (dBm) Calculated C/No at GEOLUT (dBHz) Number of Beacon Events Used (Valid Msg Sample Set) Number of Beacon Events for which Probability of Valid Message Probability of Valid Message within 5 Min Valid Message was Produced Valid Message was Produced within 5 Min 26.0 27.0 28.0 29.0 30.0 31.0 32.0 33.0 34.0 35.0 36.0 37.0 1.00 1.00 EIRP from simulator (dBm) Number of Beacon Events Used (Complete Msg Sample Set) Number of Beacon Events Used (Confirmed Complete Msg Sample Set) Number of Beacon Events for which a Complete Message was Produced Number of Beacon Events for which a Confirmed Complete Message was Produced Probability of Complete / Confirmed Complete Msg 26.0 27.0 28.0 29.0 30.0 31.0 32.0 33.0 34.0 35.0 36.0 37.0 1.00 A.3.4 Processing Threshold and Message Processing Performance A graph of the results from the tables above should be included (a theoretical example is provided herein). The processing threshold value should be highlighted by noting the value of C/No corresponding to a 0.99 probability of obtaining a valid message as indicated below. Similarly the processing performance is determined from the graph depicting C/No versus the probability of producing a valid message within 5 minutes. A - 3 A.3.5 System Margin The calculations converting the threshold value of C/No to the associated EIRP, and the resulting system margin should be provided. Processing Threshold and System Margin C/No EIRP 37 dBm Processing Threshold System Margin 1.0 .99 .98 .97 .96 Probability of Valid Message Valid Message Processing Performance C/No EIRP Processing Performance 1.0 .99 .98 .97 .96 .95 Probability of Valid Message Within 5 min Long Message Processing Performance C/No EIRP Confirmed Complete Complete 1.0 .99 .98 .97 .96 .95 Probability of Successful Message Processing A - 4 A.3.6 Test Anomalies This section should provide information concerning issues which occurred during the test which could affect results. If some data was excluded from the results, an explanation should be provided. A.3.7 Recommendations Any proposed recommendations resulting from this test should be detailed in this section. A.4 TEST T-2: TIME TO PRODUCE VALID, COMPLETE AND CONFIRMED MESSAGES A.4.1 Test Description This section should include a statement confirming that the tests were conducted and analysed in accordance with C/S R.020, or describe any modifications to the test procedures that were required. A.4.2 Test Results The results for this test are obtained by analysing the data that was collected for the T-1 Test. A reference should be provided to indicate the annex of the report where this data is provided. From the data, the table and graphs described below should be produced and included in this section of the report. In addition to the mean time to produce valid, complete and confirmed complete messages for each EIRP, the standard deviation for each of these statistics should also be calculated and provided. EIRP (dBm) C/No (dBHz) ATVM (Sec) Standard Deviation of ATVM ATCM (Sec) Standard Deviation of ATCM ATCCM (Sec) Standard Deviation of ATCCM 26.0 27.0 . . 37.0 EIRP (dBm) C/No (dBHz) 95th Percentile 98th Percentile Valid Msg (Sec) Complete Msg (Sec) Confirmed Msg (Sec) Valid Msg (Sec) Complete Msg (Sec) Confirmed Msg (Sec) 26.0 27.0 . . 37.0 A - 5 Average Time to Produce Valid, Complete and Confirmed Complete Messages C/No EIRP Confirmed Complete (ATCCM) Complete (ATCM) 300 350 400 450 500 550 600 Seconds After First Burst of Beacon Event Number of Bursts Required Valid (ATVM) 95th Percentile to Produce Valid, Complete and Confirmed Complete Messages C/No EIRP Confirmed Complete Complete 300 350 400 450 500 550 600 Seconds After First Burst of Beacon Event Number of Bursts Required Valid 98th Percentile to Produce Valid, Complete and Confirmed Complete Messages C/No EIRP Confirmed Complete Complete 300 350 400 450 500 550 600 Seconds After First Burst of Beacon Event Number of Bursts Required Valid A - 6 A.4.3 Test Anomalies This section should provide information concerning issues which occurred during the test which could affect results. If some data was excluded from the results, an explanation should be provided. A.4.4 Recommendations Any proposed recommendations resulting from this test should be detailed in this section. A.5 TEST T-3: CARRIER FREQUENCY MEASUREMENT ACCURACY A.5.1 Test Description This section should include a statement confirming that the tests were conducted and analysed in accordance with C/S R.020, or describe any modifications to the test procedures that were required. A.5.2 Test Results The results for this test are obtained by analysing the data that was collected for the T-1 Test, to obtain the average frequency measurement error and standard deviation of this error, for each EIRP. A reference should be provided to indicate the annex of the report where this data is provided. The results of these calculations should be presented in tabular and graphical formats as indicated below. EIRP (dBm) Calculated C/No at GEOLUT (dBHz) AvgFreq Measurement Error (Hz rounded to 1 decimal place) Std Deviation of Error (Hz) 26.0 . . 37.0 … EIRP AvgFreq Measurement Error (Hz) Standard Deviation Freq Measurement Error (Hz) … EIRP A - 7 A.5.3 Test Anomalies This section should provide information concerning issues which occurred during the test which could affect results. If some data was excluded from the results, an explanation should be provided. A.5.4 Recommendations Any proposed recommendations resulting from this test should be detailed in this section. A.6 TEST T-4: LOUCH GEOLUT CHANNEL CAPACITY A.6.1 Test Description This section should include a statement confirming that the tests were conducted and analysed in accordance with C/S R.020, or describe any modifications to the test procedures that were required. A.6.2 Test Results The GEOLUT data collected for this test should be included as an annex to the report, and should be referenced in this section of the report. From the data collected, the table and graph depicted below should be provided, and the capacity calculated and reported in this section of the report. Channel: 406.0XX # of Active Bcn Events % Valid Msg within 5 Min % Valid Msg within10 Min % Valid Msg within 15 Min % Confirmed Complete Msg within 15 Min A - 8 A.6.3 Test Anomalies This section should provide information concerning issues which occurred during the test which could affect results. If some data was excluded from the results, an explanation should be provided. A.6.4 Recommendations Any proposed recommendations resulting from this test should be detailed in this section. A.7 Test T-5: Impact of Interference This objective is not accomplished through a controlled test, but rather by monitoring the performance of the GEOLUT throughout the period of the entire Louch performance evaluation programme, during which time it is anticipated that there will be periods of interference. In view of the unstructured nature of this process it is not possible to predict what information will be collected, the detailed analysis which will be required, not define the structure for reporting the results in advance. 406.061 MHz Channel Capacity 0.94 0.95 0.96 0.97 0.98 0.99 1.0 5 Minute Valid Msg Curve 10 Minute Valid Msg Curve 15 Minute Valid Msg Curve 15 Minute Confirmed Complete Msg Curve Probability Number of Simultaneously Active Beacons Per Channel A - 9 In view of the above, for administrations which participated in this test objective, a description of the configuration used to detect and measure interference should be provided. In addition, the data collected for this objective should be provided as an annex to the report. Finally any data reduction and/or analysis conducted should be described and the results reported. A.8 TEST T-6: IMPACT OF INTERFERENCE FROM LEOSAR SATELLITES A.8.1 Test Description This section should include a statement confirming that the tests were conducted and analysed in accordance with C/S R.020, or describe any modifications to the test procedures that were required. A.8.2 Test Results The GEOLUT data collected for this test should be included as an annex to the report, and should be referenced in this section of the report. The following should be provided: a. histograms / graphs, as provided in the example below, which depict the performance of the GEOLUT to produce valid messages during periods when the GEOLUT was in the footprint of a LEOSAR satellite prior to the production of a valid message for a beacon event and when it was not; b. the mean and standard deviation for the time to produce valid messages, for both sample sets; c. histograms / graphs, also in the format provided below, which depict the performance to produce confirmed complete messages during periods when the GEOLUT was in the footprint of a LEOSAR satellite prior to the first valid message, and when it was not; d. the mean and standard deviation for the time to produce confirmed complete messages; and e. a graph depicting the C/No, as measured by the GEOLUT to produce the first valid message for each beacon event, plotted against the time since the start of the test (i.e., the horizontal axis of the graph will cover the 48 hour test period). With respect to the calculation for the mean and standard deviation, if the GEOLUT did not produce a valid or confirmed complete message, the beacon event should not be included in the respective sample set, and a note should be provided in the report indicating how many such events occurred. For example, the note might indicate that valid messages were not produced for 3 beacon events, and confirmed complete messages were not produced for 7 events. A - 10 GEOLUT Valid Message Production Performance A.8.3 Test Anomalies This section should provide information concerning issues which occurred during the test that could affect the results. If some data was excluded from the results, an explanation should be provided. Specifically, the number of beacon events for which the GEOLUT was not able to produce a valid or a confirmed complete message should be provided. A.8.4 Recommendations Any proposed recommendations resulting from this test should be detailed in this section. Seconds x 100 (after start of beacon event) Number of beacon events for which GEOLUT produced a valid message (no possibility of LEOSAR interference prior to first valid message). Number of beacon events for which GEOLUT produced a valid message (possible LEOSAR interference prior to first valid message). Cumulative Probability of valid message (no possibility of LEOSAR interference prior to first valid message). Cumulative Probability of valid message (possible LEOSAR interference prior to first valid message). 9-10 Number of beacon events Cumulative Probability 8-9 7-8 6-7 5-6 4-5 3-4 2-3 1-2 0-1 A - 11 A.9 TEST T-7: LOUCH GEOLUT NETWORK PERFORMANCE Since this test requires consolidating the results of objective T-6 from all the participating Louch GEOLUTs, objective T-7 will not be included in the performance evaluation reports provided by the individual GEOLUT operators. Instead the Joint Committee will produce a report for this objective by consolidating the results provided by the participating GEOLUT operators for objective T-6. A.9.1 Test Results The Joint Committee should analyse the data collected for objective T-6 (impact of LEOSAR interference), and complete the actions described below. a. An entry should be made in the format of the table described at Annex G which captures the earliest time that any of the Louch GEOLUTs produced a valid message for each beacon event, and the earliest time that any of the GEOLUTs produced a confirmed complete message for each beacon event. b. From the table produced by the Joint Committee, a graph (as described at Figure 3.7) should be provided, which depicts the performance of the Louch GEOLUT network in respect of producing valid and confirmed complete messages. c. From the consolidated data: (i) mean and standard deviation for time required for the network of Louch GEOLUTs to produce valid and confirmed messages for each beacon event should be calculated and reported; (ii) the probability that the network of Louch GEOLUTs would produce valid messages within 5 and 10 minutes should be calculated and reported; and (iii) the probability that the GEOLUT network produced confirmed complete messages should be calculated and reported. A.10 TEST T-8: PROCESSING ANOMALIES A.10.1 Test Description This section should include a statement confirming that the tests were conducted and analysed in accordance with C/S R.020, or describe any modifications to the test procedures that were required. A.10.2 Test Results An entry should be made in the table provided at Annex H (a copy of the format of the table is provided below) for each instance when the GEOLUT produced a valid message which satisfied both conditions stated below: A - 12 a. the bias frequency calculated by the GEOLUT confirmed the transmission occurred in the channel reserved for reference beacons (406.0205 - 406.0235 MHz); and b. the 15 Hex ID of the valid message produced by the GEOLUT did not match any of the 15 Hex IDs of reference beacons operating in the Louch coverage area. 15 Hex ID Produced by GEOLUT 15 Hex ID of Associated Reference Beacon Beacon Message Produced by GEOLUT (30 Hex) Date / Time LUT in LEO Footprint (Y/N) Table for Recording 406 MHz Processing Anomalies (extracted from Annex H) A.10.3 Processing Anomaly Rate (PA) The PA rate and the PA rate when the GEOLUT was in the footprint of a LEOSAR satellite should be calculated and reported. A.10.4 Test Anomalies This section should provide information concerning issues which occurred during the test which could affect results. If some data was excluded from the results, an explanation should be provided. A.10.5 Recommendations Any proposed recommendations resulting from this test should be detailed in this section. A.11 Test T-9: LOUCH COVERAGE A.11.1 Test Description This section should include a statement confirming that the tests were conducted and analysed in accordance with C/S R.020, or describe any modifications to the test procedures that were required. A.11.2 Test Results Beacon Crossing Coverage Area a. A narrative description of the test should provided, indicating the route taken, the beacon identification, and the times associated with the activation and deactivation of the beacon. A - 13 b. The GEOLUT performance in respect of producing valid messages, as a function of time and elevation angle (as indicated below) should be provided. c. The results provided in the table should be graphically depicted on a map. Beacon 15 Hex ID: Activation Date / Time: De-activation Date / Time: Date / Time Location (Lat/Long) Beacon to Satellite Elevation Angle Detected by GEOLUT (Yes/No) Evaluating Coverage Using Real Beacon Events a. All beacon events detected by the LEOSAR system in the area enclosed by 80 N/S and 80 E/W, shall be recorded as per Annex I, and an indication of whether the beacon event was also detected by the Louch GEOLUT. b. Using the data captured at Annex I, beacon events are to be grouped into geographic locations of 10 latitude/longitude blocks, and the associated statistics calculated as indicated below. Block Location Number of LEOSAR Beacon Events Number Detected by GEOLUT % Detected by GEOLUT Longitude Latitude 0/10w 0/10n 10w/20w 0/10n 20w/30w 0/10n . . . . . . 70e/80e 70s/80s c. Two maps of the data collected as per Annex I should be produced. One map depicting each beacon event that was detected by the LEOSAR and also by the Louch GEOLUT, and the second map depicting each beacon event that was only detected by the LEOSAR system. A.11.3 Test Anomalies This section should provide information concerning issues which occurred during the test which could affect results. If some data was excluded from the results, an explanation should be provided. A - 14 A.11.4 Recommendations Any proposed recommendations resulting from this test should be detailed in this section. List of Annexes (electronic copies of annexes to be provided to Secretariat separately) Annex A GEOLUT Data Collected for Objectives T-1, T-2, and T-3; Annex B GEOLUT Data Collected for Objective T-4; Annex C GEOLUT Data Collected for Objective T-6; Annex D GEOLUT Data Collected for Objective T-8; and Annex E GEOLUT Data Collected for Objective T-9 - END OF ANNEX A - B - 1 ANNEX B TEST SCRIPTS FOR OBJECTIVES T-1, T-2 AND T-3 Introduction This annex provides a description of the test signals that will be transmitted by the simulator for objectives T-1, T-2 and T-3. In order to transmit the required number of beacon events at each EIRP, each script will be comprised of 50 beacon events. A different script will be used for each EIRP value. The test script for uplink signals with EIRPs of 26 dBm is provided below. The scripts for the other EIRPs will be identical to this example except that the beacon event IDs transmitted will be coded with the appropriate EIRP value. Copies of the test scripts for EIRP values from 26 to 37 dBm are available from the Cospas-Sarsat Secretariat on request. Each row in the table represents a single beacon event. Each beacon event is comprised of 25 beacon bursts with a fixed burst repetition interval of 50 sec. The start time for each beacon event is indicated in the table. The 15 Hex ID of each beacon event conforms to the following convention: 9С5С00 X XX 0 0 0 0 X X Fixed Values For all Beacon Events (example) Beacon Event Serial 001 through 50 Fixed Values For all Beacon Events Transmit EIRP B - 2 Table B-1: Test script for Test T-1, T-2 and T-3 - END OF ANNEX B - C - 1 ANNEX C TEST SCRIPTS FOR OBJECTIVE T-4 (Channel Capacity) Introduction This annex provides a description of the test signals that will be transmitted by the simulator for objective T-4. Each script includes 15, 20, or 25 different beacons that transmit 18 beacon bursts with a fixed burst repetition interval of 50 seconds. Each beacon event is comprised of 18 beacon bursts, which may overlap in time. The start of time of the first beacon burst for each beacon event is provided in the table. To obtain sufficient statistics 10 different scripts for each beacon population will be transmitted. The beginning of one script simulating 15 simultaneously active beacons is provided below. The 15 Hex ID of each beacon event conforms to the following convention: Table C-1: Test script for Test T-4 - END OF ANNEX C - (example) D - 1 ANNEX D TEST SCRIPTS FOR OBJECTIVES T-6 AND T-7 Introduction This annex provides a description and schedule of the test signals that will be transmitted by the simulator for objectives T-6 and T-7. Each row in the table represents a single beacon event used in the test script. Each beacon event will replicate a typical 406 MHz distress beacon active for a period of 20 minutes (24 bursts ). The 15 Hex ID of each beacon event conforms to the following convention: 9C5C00 67 0 XXX 0 37 Table D-1: Test Script for Test T-6 and T-7 15 Hex ID of BCN event 30 Hex Msg of BCN Event Time of First burst in BCN Event To + X sec (hh:mm:ss:ccc) TxFreq (Hz) 9C5C00670001037 CE2E0033800081BB80A1C0100002C1 00:00:02:530 406.061 9C5C00670002037 CE2E0033800101BFC3CF40100002C1 00:10:07:190 406.061 9C5C00670003037 CE2E0033800181BC02EAC0100002C1 00:20:23:320 406.061 9C5C00670004037 CE2E0033800201BEF36A80100002C1 00:30:13:300 406.061 9C5C00670005037 CE2E0033800281BD324F00100002C1 00:40:30:210 406.061 9C5C00670006037 CE2E0033800301B9712180100002C1 00:50:04:550 406.061 9C5C00670007037 CE2E0033800381BAB00400100002C1 01:00:48:570 406.061 9C5C00670008037 CE2E0033800401BC922100100002C1 01:10:20:430 406.061 9C5C00670009037 CE2E0033800481BF530480100002C1 01:20:48:060 406.061 9C5C00670010037 CE2E0033800801B850B600100002C1 01:30:30:300 406.061 9C5C00670011037 CE2E0033800881BB919380100002C1 01:40:35:010 406.061 9C5C00670012037 CE2E0033800901BFD2FD00100002C1 01:50:26:130 406.061 9C5C00670013037 CE2E0033800981BC13D880100002C1 02:00:06:220 406.061 9C5C00670014037 CE2E0033800A01BEE258C0100002C1 02:10:11:150 406.061 9C5C00670015037 CE2E0033800A81BD237D40100002C1 02:20:34:460 406.061 9C5C00670016037 CE2E0033800B01B96013C0100002C1 02:30:26:020 406.061 9C5C00670017037 CE2E0033800B81BAA13640100002C1 02:40:17:080 406.061 9C5C00670018037 CE2E0033800C01BC831340100002C1 02:50:19:180 406.061 9C5C00670019037 CE2E0033800C81BF4236C0100002C1 03:00:11:240 406.061 9C5C00670020037 CE2E0033801001B863E0C0100002C1 03:10:36:540 406.061 9C5C00670021037 CE2E0033801081BBA2C540100002C1 03:20:30:070 406.061 Fixed Values For all Beacon Events (example) “67”indicating tests T6 and T7 Fixed Value Fixed Value Beacon Event Serial Number Transmit EIRP D - 2 9C5C00670022037 CE2E0033801101BFE1ABC0100002C1 03:30:07:400 406.061 9C5C00670023037 CE2E0033801181BC208E40100002C1 03:40:27:140 406.061 9C5C00670024037 CE2E0033801201BED10E00100002C1 03:50:20:560 406.061 9C5C00670025037 CE2E0033801281BD102B80100002C1 04:00:03:080 406.061 9C5C00670026037 CE2E0033801301B9534500100002C1 04:10:12:220 406.061 9C5C00670027037 CE2E0033801381BA926080100002C1 04:20:11:130 406.061 9C5C00670028037 CE2E0033801401BCB04580100002C1 04:30:44:330 406.061 9C5C00670029037 CE2E0033801481BF716000100002C1 04:40:38:160 406.061 9C5C00670030037 CE2E0033801801B872D280100002C1 04:50:53:260 406.061 9C5C00670031037 CE2E0033801881BBB3F700100002C1 05:00:44:590 406.061 9C5C00670032037 CE2E0033801901BFF09980100002C1 05:10:57:180 406.061 9C5C00670033037 CE2E0033801981BC31BC00100002C1 05:20:52:260 406.061 9C5C00670034037 CE2E0033801A01BEC03C40100002C1 05:30:09:120 406.061 9C5C00670035037 CE2E0033801A81BD0119C0100002C1 05:40:51:320 406.061 9C5C00670036037 CE2E0033801B01B9427740100002C1 05:50:25:530 406.061 9C5C00670037037 CE2E0033801B81BA8352C0100002C1 06:00:04:310 406.061 9C5C00670038037 CE2E0033801C01BCA177C0100002C1 06:10:30:330 406.061 9C5C00670039037 CE2E0033801C81BF605240100002C1 06:20:53:220 406.061 9C5C00670040037 CE2E0033802001B8054D40100002C1 06:30:49:100 406.061 9C5C00670041037 CE2E0033802081BBC468C0100002C1 06:40:28:090 406.061 9C5C00670042037 CE2E0033802101BF870640100002C1 06:50:42:080 406.061 9C5C00670043037 CE2E0033802181BC4623C0100002C1 07:00:25:190 406.061 9C5C00670044037 CE2E0033802201BEB7A380100002C1 07:10:57:170 406.061 9C5C00670045037 CE2E0033802281BD768600100002C1 07:20:38:590 406.061 9C5C00670046037 CE2E0033802301B935E880100002C1 07:30:07:500 406.061 9C5C00670047037 CE2E0033802381BAF4CD00100002C1 07:40:08:510 406.061 9C5C00670048037 CE2E0033802401BCD6E800100002C1 07:50:20:440 406.061 9C5C00670049037 CE2E0033802481BF17CD80100002C1 08:00:13:310 406.061 9C5C00670050037 CE2E0033802801B8147F00100002C1 08:10:09:110 406.061 9C5C00670051037 CE2E0033802881BBD55A80100002C1 08:20:52:560 406.061 9C5C00670052037 CE2E0033802901BF963400100002C1 08:30:36:410 406.061 9C5C00670053037 CE2E0033802981BC571180100002C1 08:40:08:360 406.061 9C5C00670054037 CE2E0033802A01BEA691C0100002C1 08:50:13:480 406.061 9C5C00670055037 CE2E0033802A81BD67B440100002C1 09:00:17:330 406.061 9C5C00670056037 CE2E0033802B01B924DAC0100002C1 09:10:52:130 406.061 9C5C00670057037 CE2E0033802B81BAE5FF40100002C1 09:20:49:210 406.061 9C5C00670058037 CE2E0033802C01BCC7DA40100002C1 09:30:44:040 406.061 9C5C00670059037 CE2E0033802C81BF06FFC0100002C1 09:40:29:370 406.061 9C5C00670060037 CE2E0033803001B82729C0100002C1 09:50:41:370 406.061 9C5C00670061037 CE2E0033803081BBE60C40100002C1 10:00:03:420 406.061 9C5C00670062037 CE2E0033803101BFA562C0100002C1 10:10:49:360 406.061 9C5C00670063037 CE2E0033803181BC644740100002C1 10:20:19:380 406.061 9C5C00670064037 CE2E0033803201BE95C700100002C1 10:30:01:510 406.061 9C5C00670065037 CE2E0033803281BD54E280100002C1 10:40:55:310 406.061 9C5C00670066037 CE2E0033803301B9178C00100002C1 10:50:49:060 406.061 9C5C00670067037 CE2E0033803381BAD6A980100002C1 11:00:38:480 406.061 9C5C00670068037 CE2E0033803401BCF48C80100002C1 11:10:51:020 406.061 9C5C00670069037 CE2E0033803481BF35A900100002C1 11:20:12:160 406.061 9C5C00670070037 CE2E0033803801B8361B80100002C1 11:30:40:580 406.061 9C5C00670071037 CE2E0033803881BBF73E00100002C1 11:40:09:420 406.061 9C5C00670072037 CE2E0033803901BFB45080100002C1 11:50:46:510 406.061 D - 3 9C5C00670073037 CE2E0033803981BC757500100002C1 12:00:56:180 406.061 9C5C00670074037 CE2E0033803A01BE84F540100002C1 12:10:04:110 406.061 9C5C00670075037 CE2E0033803A81BD45D0C0100002C1 12:20:24:370 406.061 9C5C00670076037 CE2E0033803B01B906BE40100002C1 12:30:12:180 406.061 9C5C00670077037 CE2E0033803B81BAC79BC0100002C1 12:40:26:320 406.061 9C5C00670078037 CE2E0033803C01BCE5BEC0100002C1 12:50:24:090 406.061 9C5C00670079037 CE2E0033803C81BF249B40100002C1 13:00:14:180 406.061 9C5C00670080037 CE2E0033804001B8C81640100002C1 13:10:39:140 406.061 9C5C00670081037 CE2E0033804081BB0933C0100002C1 13:20:35:560 406.061 9C5C00670082037 CE2E0033804101BF4A5D40100002C1 13:30:37:390 406.061 9C5C00670083037 CE2E0033804181BC8B78C0100002C1 13:40:19:230 406.061 9C5C00670084037 CE2E0033804201BE7AF880100002C1 13:50:32:090 406.061 9C5C00670085037 CE2E0033804281BDBBDD00100002C1 14:00:21:190 406.061 9C5C00670086037 CE2E0033804301B9F8B380100002C1 14:10:45:500 406.061 9C5C00670087037 CE2E0033804381BA399600100002C1 14:20:19:200 406.061 9C5C00670088037 CE2E0033804401BC1BB300100002C1 14:30:00:530 406.061 9C5C00670089037 CE2E0033804481BFDA9680100002C1 14:40:43:570 406.061 9C5C00670090037 CE2E0033804801B8D92400100002C1 14:50:21:170 406.061 9C5C00670091037 CE2E0033804881BB180180100002C1 15:00:01:570 406.061 9C5C00670092037 CE2E0033804901BF5B6F00100002C1 15:10:28:340 406.061 9C5C00670093037 CE2E0033804981BC9A4A80100002C1 15:20:56:300 406.061 9C5C00670094037 CE2E0033804A01BE6BCAC0100002C1 15:30:43:080 406.061 9C5C00670095037 CE2E0033804A81BDAAEF40100002C1 15:40:06:280 406.061 9C5C00670096037 CE2E0033804B01B9E981C0100002C1 15:50:04:260 406.061 9C5C00670097037 CE2E0033804B81BA28A440100002C1 16:00:55:410 406.061 9C5C00670098037 CE2E0033804C01BC0A8140100002C1 16:10:58:140 406.061 9C5C00670099037 CE2E0033804C81BFCBA4C0100002C1 16:20:56:100 406.061 9C5C00670100037 CE2E0033808001B952A040100002C1 16:30:43:480 406.061 9C5C00670101037 CE2E0033808081BA9385C0100002C1 16:40:15:270 406.061 9C5C00670102037 CE2E0033808101BED0EB40100002C1 16:50:48:270 406.061 9C5C00670103037 CE2E0033808181BD11CEC0100002C1 17:00:56:360 406.061 9C5C00670104037 CE2E0033808201BFE04E80100002C1 17:10:15:100 406.061 9C5C00670105037 CE2E0033808281BC216B00100002C1 17:20:12:400 406.061 9C5C00670106037 CE2E0033808301B8620580100002C1 17:30:14:560 406.061 9C5C00670107037 CE2E0033808381BBA32000100002C1 17:40:00:210 406.061 9C5C00670108037 CE2E0033808401BD810500100002C1 17:50:10:130 406.061 9C5C00670109037 CE2E0033808481BE402080100002C1 18:00:13:280 406.061 9C5C00670110037 CE2E0033808801B9439200100002C1 18:10:06:300 406.061 9C5C00670111037 CE2E0033808881BA82B780100002C1 18:20:30:200 406.061 9C5C00670112037 CE2E0033808901BEC1D900100002C1 18:30:17:010 406.061 9C5C00670113037 CE2E0033808981BD00FC80100002C1 18:40:43:050 406.061 9C5C00670114037 CE2E0033808A01BFF17CC0100002C1 18:50:13:040 406.061 9C5C00670115037 CE2E0033808A81BC305940100002C1 19:00:20:420 406.061 9C5C00670116037 CE2E0033808B01B87337C0100002C1 19:10:11:160 406.061 9C5C00670117037 CE2E0033808B81BBB21240100002C1 19:20:09:140 406.061 9C5C00670118037 CE2E0033808C01BD903740100002C1 19:30:36:090 406.061 9C5C00670119037 CE2E0033808C81BE5112C0100002C1 19:40:30:190 406.061 9C5C00670120037 CE2E0033809001B970C4C0100002C1 19:50:25:300 406.061 9C5C00670121037 CE2E0033809081BAB1E140100002C1 20:00:26:110 406.061 9C5C00670122037 CE2E0033809101BEF28FC0100002C1 20:10:20:280 406.061 9C5C00670123037 CE2E0033809181BD33AA40100002C1 20:20:52:440 406.061 D - 4 9C5C00670124037 CE2E0033809201BFC22A00100002C1 20:30:41:290 406.061 9C5C00670125037 CE2E0033809281BC030F80100002C1 20:40:35:130 406.061 9C5C00670126037 CE2E0033809301B8406100100002C1 20:50:17:280 406.061 9C5C00670127037 CE2E0033809381BB814480100002C1 21:00:20:470 406.061 9C5C00670128037 CE2E0033809401BDA36180100002C1 21:10:35:370 406.061 9C5C00670129037 CE2E0033809481BE624400100002C1 21:20:50:470 406.061 9C5C00670130037 CE2E0033809801B961F680100002C1 21:30:41:060 406.061 9C5C00670131037 CE2E0033809881BAA0D300100002C1 21:40:09:430 406.061 9C5C00670132037 CE2E0033809901BEE3BD80100002C1 21:50:25:200 406.061 9C5C00670133037 CE2E0033809981BD229800100002C1 22:00:52:090 406.061 9C5C00670134037 CE2E0033809A01BFD31840100002C1 22:10:23:310 406.061 9C5C00670135037 CE2E0033809A81BC123DC0100002C1 22:20:49:550 406.061 9C5C00670136037 CE2E0033809B01B8515340100002C1 22:30:37:460 406.061 9C5C00670137037 CE2E0033809B81BB9076C0100002C1 22:40:34:380 406.061 9C5C00670138037 CE2E0033809C01BDB253C0100002C1 22:50:09:570 406.061 9C5C00670139037 CE2E0033809C81BE737640100002C1 23:00:57:080 406.061 9C5C00670140037 CE2E003380A001B9166940100002C1 23:10:06:120 406.061 9C5C00670141037 CE2E003380A081BAD74CC0100002C1 23:20:54:250 406.061 9C5C00670142037 CE2E003380A101BE942240100002C1 23:30:31:290 406.061 9C5C00670143037 CE2E003380A181BD5507C0100002C1 23:40:49:200 406.061 9C5C00670144037 CE2E003380A201BFA48780100002C1 23:50:24:480 406.061 9C5C00670145037 CE2E003380A281BC65A200100002C1 24:00:12:540 406.061 9C5C00670146037 CE2E003380A301B826CC80100002C1 24:10:38:020 406.061 9C5C00670147037 CE2E003380A381BBE7E900100002C1 24:20:56:050 406.061 9C5C00670148037 CE2E003380A401BDC5CC00100002C1 24:30:36:190 406.061 9C5C00670149037 CE2E003380A481BE04E980100002C1 24:40:48:340 406.061 9C5C00670150037 CE2E003380A801B9075B00100002C1 24:50:52:250 406.061 9C5C00670151037 CE2E003380A881BAC67E80100002C1 25:00:01:290 406.061 9C5C00670152037 CE2E003380A901BE851000100002C1 25:10:07:500 406.061 9C5C00670153037 CE2E003380A981BD443580100002C1 25:20:50:330 406.061 9C5C00670154037 CE2E003380AA01BFB5B5C0100002C1 25:30:12:160 406.061 9C5C00670155037 CE2E003380AA81BC749040100002C1 25:40:24:440 406.061 9C5C00670156037 CE2E003380AB01B837FEC0100002C1 25:50:11:400 406.061 9C5C00670157037 CE2E003380AB81BBF6DB40100002C1 26:00:35:380 406.061 9C5C00670158037 CE2E003380AC01BDD4FE40100002C1 26:10:27:180 406.061 9C5C00670159037 CE2E003380AC81BE15DBC0100002C1 26:20:32:080 406.061 9C5C00670160037 CE2E003380B001B9340DC0100002C1 26:30:22:140 406.061 9C5C00670161037 CE2E003380B081BAF52840100002C1 26:40:51:520 406.061 9C5C00670162037 CE2E003380B101BEB646C0100002C1 26:50:19:240 406.061 9C5C00670163037 CE2E003380B181BD776340100002C1 27:00:58:470 406.061 9C5C00670164037 CE2E003380B201BF86E300100002C1 27:10:38:010 406.061 9C5C00670165037 CE2E003380B281BC47C680100002C1 27:20:54:430 406.061 9C5C00670166037 CE2E003380B301B804A800100002C1 27:30:12:560 406.061 9C5C00670167037 CE2E003380B381BBC58D80100002C1 27:40:36:460 406.061 9C5C00670168037 CE2E003380B401BDE7A880100002C1 27:50:25:350 406.061 9C5C00670169037 CE2E003380B481BE268D00100002C1 28:00:33:500 406.061 9C5C00670170037 CE2E003380B801B9253F80100002C1 28:10:57:010 406.061 9C5C00670171037 CE2E003380B881BAE41A00100002C1 28:20:13:520 406.061 9C5C00670172037 CE2E003380B901BEA77480100002C1 28:30:28:430 406.061 9C5C00670173037 CE2E003380B981BD665100100002C1 28:40:40:190 406.061 9C5C00670174037 CE2E003380BA01BF97D140100002C1 28:50:14:550 406.061 D - 5 9C5C00670175037 CE2E003380BA81BC56F4C0100002C1 29:00:20:000 406.061 9C5C00670176037 CE2E003380BB01B8159A40100002C1 29:10:21:330 406.061 9C5C00670177037 CE2E003380BB81BBD4BFC0100002C1 29:20:53:350 406.061 9C5C00670178037 CE2E003380BC01BDF69AC0100002C1 29:30:52:260 406.061 9C5C00670179037 CE2E003380BC81BE37BF40100002C1 29:40:25:000 406.061 9C5C00670180037 CE2E003380C001B9DB3240100002C1 29:50:06:460 406.061 9C5C00670181037 CE2E003380C081BA1A17C0100002C1 30:00:45:470 406.061 9C5C00670182037 CE2E003380C101BE597940100002C1 30:10:58:290 406.061 9C5C00670183037 CE2E003380C181BD985CC0100002C1 30:20:21:060 406.061 9C5C00670184037 CE2E003380C201BF69DC80100002C1 30:30:16:540 406.061 9C5C00670185037 CE2E003380C281BCA8F900100002C1 30:40:06:480 406.061 9C5C00670186037 CE2E003380C301B8EB9780100002C1 30:50:47:370 406.061 9C5C00670187037 CE2E003380C381BB2AB200100002C1 31:00:13:000 406.061 9C5C00670188037 CE2E003380C401BD089700100002C1 31:10:06:410 406.061 9C5C00670189037 CE2E003380C481BEC9B280100002C1 31:20:44:480 406.061 9C5C00670190037 CE2E003380C801B9CA0000100002C1 31:30:25:350 406.061 9C5C00670191037 CE2E003380C881BA0B2580100002C1 31:40:27:210 406.061 9C5C00670192037 CE2E003380C901BE484B00100002C1 31:50:25:240 406.061 9C5C00670193037 CE2E003380C981BD896E80100002C1 32:00:28:160 406.061 9C5C00670194037 CE2E003380CA01BF78EEC0100002C1 32:10:28:090 406.061 9C5C00670195037 CE2E003380CA81BCB9CB40100002C1 32:20:17:580 406.061 9C5C00670196037 CE2E003380CB01B8FAA5C0100002C1 32:30:18:260 406.061 9C5C00670197037 CE2E003380CB81BB3B8040100002C1 32:40:29:460 406.061 9C5C00670198037 CE2E003380CC01BD19A540100002C1 32:50:15:430 406.061 9C5C00670199037 CE2E003380CC81BED880C0100002C1 33:00:23:310 406.061 9C5C00670200037 CE2E0033810001BA67CC40100002C1 33:10:31:440 406.061 9C5C00670201037 CE2E0033810081B9A6E9C0100002C1 33:20:56:090 406.061 9C5C00670202037 CE2E0033810101BDE58740100002C1 33:30:03:110 406.061 9C5C00670203037 CE2E0033810181BE24A2C0100002C1 33:40:02:430 406.061 9C5C00670204037 CE2E0033810201BCD52280100002C1 33:50:00:260 406.061 9C5C00670205037 CE2E0033810281BF140700100002C1 34:00:57:190 406.061 9C5C00670206037 CE2E0033810301BB576980100002C1 34:10:03:520 406.061 9C5C00670207037 CE2E0033810381B8964C00100002C1 34:20:26:160 406.061 9C5C00670208037 CE2E0033810401BEB46900100002C1 34:30:49:280 406.061 9C5C00670209037 CE2E0033810481BD754C80100002C1 34:40:51:340 406.061 9C5C00670210037 CE2E0033810801BA76FE00100002C1 34:50:09:210 406.061 9C5C00670211037 CE2E0033810881B9B7DB80100002C1 35:00:21:090 406.061 9C5C00670212037 CE2E0033810901BDF4B500100002C1 35:10:13:230 406.061 9C5C00670213037 CE2E0033810981BE359080100002C1 35:20:47:370 406.061 9C5C00670214037 CE2E0033810A01BCC410C0100002C1 35:30:31:310 406.061 9C5C00670215037 CE2E0033810A81BF053540100002C1 35:40:10:380 406.061 9C5C00670216037 CE2E0033810B01BB465BC0100002C1 35:50:20:000 406.061 9C5C00670217037 CE2E0033810B81B8877E40100002C1 36:00:36:580 406.061 9C5C00670218037 CE2E0033810C01BEA55B40100002C1 36:10:04:400 406.061 9C5C00670219037 CE2E0033810C81BD647EC0100002C1 36:20:10:470 406.061 9C5C00670220037 CE2E0033811001BA45A8C0100002C1 36:30:47:200 406.061 9C5C00670221037 CE2E0033811081B9848D40100002C1 36:40:04:590 406.061 9C5C00670222037 CE2E0033811101BDC7E3C0100002C1 36:50:37:320 406.061 9C5C00670223037 CE2E0033811181BE06C640100002C1 37:00:07:280 406.061 9C5C00670224037 CE2E0033811201BCF74600100002C1 37:10:01:270 406.061 9C5C00670225037 CE2E0033811281BF366380100002C1 37:20:22:320 406.061 D - 6 9C5C00670226037 CE2E0033811301BB750D00100002C1 37:30:58:340 406.061 9C5C00670227037 CE2E0033811381B8B42880100002C1 37:40:16:060 406.061 9C5C00670228037 CE2E0033811401BE960D80100002C1 37:50:34:300 406.061 9C5C00670229037 CE2E0033811481BD572800100002C1 38:00:58:090 406.061 9C5C00670230037 CE2E0033811801BA549A80100002C1 38:10:46:060 406.061 9C5C00670231037 CE2E0033811881B995BF00100002C1 38:20:29:470 406.061 9C5C00670232037 CE2E0033811901BDD6D180100002C1 38:30:59:390 406.061 9C5C00670233037 CE2E0033811981BE17F400100002C1 38:40:44:430 406.061 9C5C00670234037 CE2E0033811A01BCE67440100002C1 38:50:06:450 406.061 9C5C00670235037 CE2E0033811A81BF2751C0100002C1 39:00:54:040 406.061 9C5C00670236037 CE2E0033811B01BB643F40100002C1 39:10:43:170 406.061 9C5C00670237037 CE2E0033811B81B8A51AC0100002C1 39:20:26:490 406.061 9C5C00670238037 CE2E0033811C01BE873FC0100002C1 39:30:03:410 406.061 9C5C00670239037 CE2E0033811C81BD461A40100002C1 39:40:44:180 406.061 9C5C00670240037 CE2E0033812001BA230540100002C1 39:50:41:030 406.061 9C5C00670241037 CE2E0033812081B9E220C0100002C1 40:00:26:340 406.061 9C5C00670242037 CE2E0033812101BDA14E40100002C1 40:10:55:080 406.061 9C5C00670243037 CE2E0033812181BE606BC0100002C1 40:20:30:310 406.061 9C5C00670244037 CE2E0033812201BC91EB80100002C1 40:30:45:100 406.061 9C5C00670245037 CE2E0033812281BF50CE00100002C1 40:40:53:030 406.061 9C5C00670246037 CE2E0033812301BB13A080100002C1 40:50:23:540 406.061 9C5C00670247037 CE2E0033812381B8D28500100002C1 41:00:26:510 406.061 9C5C00670248037 CE2E0033812401BEF0A000100002C1 41:10:02:390 406.061 9C5C00670249037 CE2E0033812481BD318580100002C1 41:20:01:170 406.061 9C5C00670250037 CE2E0033812801BA323700100002C1 41:30:21:520 406.061 9C5C00670251037 CE2E0033812881B9F31280100002C1 41:40:22:360 406.061 9C5C00670252037 CE2E0033812901BDB07C00100002C1 41:50:50:410 406.061 9C5C00670253037 CE2E0033812981BE715980100002C1 42:00:55:440 406.061 9C5C00670254037 CE2E0033812A01BC80D9C0100002C1 42:10:44:360 406.061 9C5C00670255037 CE2E0033812A81BF41FC40100002C1 42:20:47:470 406.061 9C5C00670256037 CE2E0033812B01BB0292C0100002C1 42:30:40:590 406.061 9C5C00670257037 CE2E0033812B81B8C3B740100002C1 42:40:32:300 406.061 9C5C00670258037 CE2E0033812C01BEE19240100002C1 42:50:56:080 406.061 9C5C00670259037 CE2E0033812C81BD20B7C0100002C1 43:00:20:150 406.061 9C5C00670260037 CE2E0033813001BA0161C0100002C1 43:10:53:190 406.061 9C5C00670261037 CE2E0033813081B9C04440100002C1 43:20:59:570 406.061 9C5C00670262037 CE2E0033813101BD832AC0100002C1 43:30:15:380 406.061 9C5C00670263037 CE2E0033813181BE420F40100002C1 43:40:27:250 406.061 9C5C00670264037 CE2E0033813201BCB38F00100002C1 43:50:09:590 406.061 9C5C00670265037 CE2E0033813281BF72AA80100002C1 44:00:14:540 406.061 9C5C00670266037 CE2E0033813301BB31C400100002C1 44:10:01:150 406.061 9C5C00670267037 CE2E0033813381B8F0E180100002C1 44:20:31:330 406.061 9C5C00670268037 CE2E0033813401BED2C480100002C1 44:30:50:270 406.061 9C5C00670269037 CE2E0033813481BD13E100100002C1 44:40:02:300 406.061 9C5C00670270037 CE2E0033813801BA105380100002C1 44:50:31:550 406.061 9C5C00670271037 CE2E0033813881B9D17600100002C1 45:00:08:320 406.061 9C5C00670272037 CE2E0033813901BD921880100002C1 45:10:05:590 406.061 9C5C00670273037 CE2E0033813981BE533D00100002C1 45:20:14:320 406.061 9C5C00670274037 CE2E0033813A01BCA2BD40100002C1 45:30:55:250 406.061 9C5C00670275037 CE2E0033813A81BF6398C0100002C1 45:40:55:170 406.061 9C5C00670276037 CE2E0033813B01BB20F640100002C1 45:50:46:210 406.061 D - 7 - END OF ANNEX D - 9C5C00670277037 CE2E0033813B81B8E1D3C0100002C1 46:00:17:190 406.061 9C5C00670278037 CE2E0033813C01BEC3F6C0100002C1 46:10:42:170 406.061 9C5C00670279037 CE2E0033813C81BD02D340100002C1 46:20:20:430 406.061 9C5C00670280037 CE2E0033814001BAEE5E40100002C1 46:30:18:380 406.061 9C5C00670281037 CE2E0033814081B92F7BC0100002C1 46:40:14:150 406.061 9C5C00670282037 CE2E0033814101BD6C1540100002C1 46:50:11:520 406.061 9C5C00670283037 CE2E0033814181BEAD30C0100002C1 47:00:09:140 406.061 9C5C00670284037 CE2E0033814201BC5CB080100002C1 47:10:08:030 406.061 9C5C00670285037 CE2E0033814281BF9D9500100002C1 47:20:50:500 406.061 9C5C00670286037 CE2E0033814301BBDEFB80100002C1 47:30:43:290 406.061 9C5C00670287037 CE2E0033814381B81FDE00100002C1 47:40:58:510 406.061 9C5C00670288037 CE2E0033814401BE3DFB00100002C1 47:50:10:500 406.061 9C5C00670289037 CE2E0033814481BDFCDE80100002C1 48:00:10:140 406.061 E - 1 ANNEX E DATA TO BE COLLECTED FOR OBJECTIVES T-1, T-2 AND T-3 Introduction This annex provides a description of the data to be recorded for each beacon event transmitted by the simulator for objectives T-1, T-2, and T-3. This information provides the foundation for the analysis and conclusions provided in the body of the report. The table below combines information obtained from the simulator operator, with data collected from the GEOLUT under test. Each row in the table represents a single beacon event. A separate table should be provided for each run of the simulator (i.e. there should be 4 tables for each EIRP value since each EIRP scenario is repeated 4 times). These tables should be included as an annex in the Louch Performance Evaluation Report provided by each participating Louch GEOLUT operator. Table E-1: Results for Tests T-1, T-2 and T-3 EIRP (dBm)__________________ Date/Time of First Burst in Test Script Run 1____________ 15 Hex ID Tx by Simulator Time of First Burst in Bcn Event Time GEOLUT provided First Valid Msg First Valid Msg C/No Measured by GEOLUT (dBHz) Time GEOLUT provided First Complete Msg First Complete Msg C/No Measured by GEOLUT (dBHz) Time GEOLUT Provided Confirmed Msg Confirmed Complete Msg C/No Measured by GEOLUT (dBHz) Freq Transmitted (Hz) Calibrated Freq Measured by GEOLUT for first Valid Message (Hz) The time required for the GEOLUT to produce a valid message for each beacon event can be calculated by taking the difference between columns 3 and 2. The time to produce complete and confirmed complete message is the difference between columns 5 and 2, and 7 and 2. E - 2 - END OF ANNEX E – F - 1 ANNEX F DATA TO BE COLLECTED FOR OBJECTIVE T-4 Introduction This annex provides a description of the data which should be recorded for each beacon event transmitted by the simulator for objective T-4. This information provides the foundation for the analysis and conclusions provided in the body of the report. The table below combines information obtained from the simulator operator, with data collected by the GEOLUT under test. Each row in the table represents a single beacon event. A separate table should be provided for each run of a test script (i.e. there should be 10 tables for each simulated traffic load). These tables should be included as an annex in the Louch Performance Evaluation Report provided by each participating Louch GEOLUT operator. Simulated Traffic Load (Number of simultaneously occurring beacon events)______________ Script Number ___ Date/Time of First Burst in Test Script Run 1____________ 15 Hex ID Tx by Simulator Time of First Burst in Bcn Event Time GEOLUT provided First Valid Msg First Valid Msg C/No Measured by GEOLUT (dBHz) Time GEOLUT provided first Complete Msg First Complete Msg C/No Measured by GEOLUT (dBHz) Time GEOLUT Confirmed Complete Msg Confirmed Complete Msg C/No Measured by GEOLUT (dBHz) Frequency F - 2 - END OF ANNEX F - G - 1 ANNEX G DATA TO BE COLLECTED FOR OBJECTIVES T-6 AND T-7 Introduction This annex provides a description of the data which should be recorded for each beacon event transmitted by the simulator for objectives T-6 and T-7. This information provides the foundation for the analysis and conclusions provided in the body of the report. The table below combines information obtained from the simulator operator, with data collected by the GEOLUT under test. Each row in the table represents a single beacon event. This table should be included as an annex in the Louch Performance Evaluation Report provided by each participating Louch GEOLUT operator. 15 Hex ID Tx by Simulator Time of First Burst in Bcn Event Time GEOLUT Provided First Valid Msg First Valid Msg C/No measured by GEOLUT (dBHz) Time GEOLUT Provided First Complete Message First Complete Msg C/No measured by GEOLUT (dBHz) Time GEOLUT Provided First Confirmed Complete Msg Confirmed Complete Msg C/No measured by GEOLUT (dBHz) LEOSAR Interference (Y/N) - END OF ANNEX G - H - 1 ANNEX H DATA TO BE COLLECTED FOR OBJECTIVE T-8 Introduction This annex provides a description of the data which should be recorded for each processing anomaly noted in the 406 MHz channel reserved for reference beacons. This table should be included as an annex in the Louch Performance Evaluation Report provided by each participating Louch GEOLUT operator. 15 Hex ID Produced by GEOLUT 15 Hex ID of Associated Reference Beacon Beacon Message Produced by GEOLUT (30 Hex) C/No of Message as Measured by GEOLUT (dBHz) Date / Time LUT in LEO Footprint (Y/N) _________ = Total duration that the GEOLUT was in the footprint of a LEOSAR satellite during the 4 week period of observation. - END OF ANNEX H - I - 1 ANNEX I DATA TO BE COLLECTED FOR OBJECTIVE T-9 Introduction This annex provides a description of the data which should be recorded for test T-9 (Louch coverage), for the test using beacon events of opportunity. This table should be included as an annex in the Louch Performance Evaluation Report provided by each participating Louch GEOLUT operator. 15 Hex ID Location Determined by LEOSAR System LEOSAR Detection Time Detected by GEOLUT (Yes / No) - END OF ANNEX I - J -1 ANNEX J Tentative Schedule of the LOUCH GEOSAR Performance Evaluation Programme Note: The main test campaign (which requires the using of beacon simulator) is expected to take less than a week and is assumed to be conducted within two months period. The duration and exact dates are subject to the availability of a beacon simulator which may also be involved in the MEOSAR D&E activities. -END OF ANNEX J- Milestone August September October November December January February March April May June July August September Approval of Louch GEOSAR Performance Evaluation Plan by CSC-49 Louch GEOSAR Test preparation and Coordination Louch GEOSAR Main Test campaign Test report preparation and internal review Report is ready to be submitted to the Cospas-Sarsat Secretariat - END OF DOCUMENT - Cospas-Sarsat Secretariat 1250 René-Lévesque Blvd. West, Suite 4215, Montréal (Québec) H3B 4W8 Canada Telephone: +1 514 500 7999 Fax: +1 514 500 7996 Email: mail@cospas-sarsat.int Website: http://www.cospas-sarsat.int