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---
title: "T010: C/S T.010 - Issue 1 Rev.10"
description: "Official Cospas-Sarsat T-series document T010"
sidebar:
badge:
text: "T"
variant: "note"
# Extended Cospas-Sarsat metadata
documentId: "T010"
series: "T"
seriesName: "Technical"
documentType: "specification"
isLatest: true
issue: 1
revision: 10
documentDate: "October 2025"
originalTitle: "C/S T.010 - Issue 1 Rev.10"
---
> **📋 Document Information**
>
> **Series:** T-Series (Technical)
> **Version:** Issue 1 - Revision 10
> **Date:** October 2025
> **Source:** [Cospas-Sarsat Official Documents](https://www.cospas-sarsat.int/en/documents-pro/system-documents)
---
COSPAS-SARSAT
GEOLUT COMMISSIONING STANDARD
C/S T.010
Issue 1 Revision 10
![Image 1 from page 1](/images/cospas-sarsat/T-series/T010/T010_page_1_img_1.png)
COSPAS-SARSAT GEOLUT
COMMISSIONING STANDARD
History
Issue
Revision
Date
Comments
Approved (CSC-21)
Approved (CSC-23)
Approved (CSC-29)
Approved (CSC-31)
Approved (CSC-33)
Approved (CSC-39)
Approved (CSC-43)
Approved (CSC-51)
Approved (CSC-67)
Approved (CSC-69)
Approved (CSC-73)
TABLE OF CONTENTS
Page
History ....................................................................................................................................................... i
Table of Contents ...................................................................................................................................... ii
List of Annexes
..................................................................................................................................... iii
List of Figures
..................................................................................................................................... iii
List of Tables
..................................................................................................................................... iii
1.
INTRODUCTION .................................................................................................. 1-1
1.1
OVERVIEW ................................................................................................................. 1-1
1.2
SCOPE .......................................................................................................................... 1-1
1.3
REFERENCE DOCUMENTS ...................................................................................... 1-1
2.
GEOLUT COMMISSIONING ............................................................................. 2-1
2.1
GENERAL .................................................................................................................... 2-1
2.2
PRE-TEST REQUIREMENTS .................................................................................... 2-1
2.3
TEST DATA COLLECTION ....................................................................................... 2-1
2.4
FREQUENCY REGISTRATION ................................................................................ 2-1
2.5
DATA COLLECTION LIMITATION ......................................................................... 2-2
2.6
SUBMISSION OF RESULTS ...................................................................................... 2-2
2.7
GEOLUT COMMISSIONING AND INTEGRATION ............................................... 2-2
2.8
CONFIRMATION OF REQUIREMENTS .................................................................. 2-2
2.9
CHANGE OF LOCATION .......................................................................................... 2-3
3.
EVALUATION OF OPERATIONAL REQUIREMENTS ................................ 3-1
3.1
GEOLUT DATA AVAILABILITY ............................................................................. 3-1
3.2
DATA REQUIREMENTS ........................................................................................... 3-1
3.3
SATELLITE TRACKING CAPABILITY ................................................................... 3-1
3.4
SATELLITE VISIBILITY ........................................................................................... 3-1
3.5
STATUS AND ALARM .............................................................................................. 3-1
3.6
RF RADIATION AND EMISSIONS ........................................................................... 3-1
3.7
INTERFERENCE ......................................................................................................... 3-1
3.8
DATA ARCHIVING .................................................................................................... 3-2
4.
EVALUATION OF FUNCTIONAL AND PROCESSING
REQUIREMENTS ................................................................................................. 4-1
4.1
FUNCTIONAL REQUIREMENTS ............................................................................. 4-1
4.2
PROCESSING REQUIREMENTS .............................................................................. 4-1
5.
EVALUATION OF PERFORMANCE REQUIREMENTS .............................. 5-1
5.1
PERFORMANCE REQUIREMENTS TESTING ....................................................... 5-1
5.2
PERFORMANCE REQUIREMENTS VERIFICATION ............................................ 5-1
LIST OF ANNEXES
ANNEX A - GEOLUT COMMISSIONING REPORT .................................................................... A-1
ANNEX B - STATISTICAL REQUIREMENTS ............................................................................. B-1
ANNEX C - BEACON SIMULATOR TEST SCRIPT ..................................................................... C-1
ANNEX D - DATA FORMAT .......................................................................................................... D-1
ANNEX E - TEST CONDITIONS .................................................................................................... E-1
ANNEX F - GEOLUT COMMISSIONING - PRINCIPLES AND POLICIES................................ F-1
ANNEX G - GUIDELINES FOR INTEGRATION OF NEW GEOLUTS IN THE COSPAS-
SARSAT SYSTEM ..................................................................................................... G-1
ANNEX H - GUIDELINES FOR REGISTRATION OF GEOLUTS WITH ITU ........................... H-1
ANNEX I - GEOLUT REQUIREMENTS MATRIX ........................................................................ I-1
LIST OF FIGURES
Figure G.1: Overview of GEOLUT Integration ................................................................................ G-3
LIST OF TABLES
Table A.1 - GEOLUT Commissioning Summary Data Table (General Part) ................................... A-2
Table A.2 - GEOLUT Commissioning Summary Data Table (C/S T.001 Beacons Part) ................. A-3
Table A.3 - GEOLUT Commissioning Summary Data Table (C/S T.018 Beacons Part) ................. A-4
1-1
1.
INTRODUCTION
1.1
Overview
The GEOLUT commissioning standard shall be used to verify that a Geostationary local user terminal
(GEOLUT) complies with the Cospas-Sarsat GEOLUT Performance Specification (C/S T.009). The
national Administrations that wish to connect a new GEOLUT to the Cospas-Sarsat Network shall
conduct the tests and provide the data, specified in this document to the Cospas-Sarsat Secretariat.
1.2
Scope
This standard specifies the testing and reporting requirements for the commissioning of a Cospas-
Sarsat GEOLUT. Section 2 defines the general commissioning process, section 3 describes the
evaluation of the operational requirements, section 4 specifies the evaluation of functional and
processing requirements and section 5 specifies the evaluation of performance requirements. The
annexes 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.
1.3
Reference Documents
The latest version of the following documents contains useful information applicable to GEOLUT
commissioning:
a.
C/S A.001, Cospas-Sarsat Data Distribution Plan (DDP);
b.
C/S A.002, Cospas-Sarsat Mission Control Centres Standard Interface Description
(SID);
c.
C/S A.005, Cospas-Sarsat Mission Control Centre Performance Specification and
Design Guidelines;
d.
C/S A.006, Cospas-Sarsat MCC Commissioning Standard;
e.
C/S T.001, Specification For Cospas-Sarsat 406 MHz Distress Beacons;
f.
C/S T.002, Cospas-Sarsat LEOLUT Performance Specification and Design Guidelines;
g.
C/S T.005, Cospas-Sarsat LEOLUT Commissioning Standard;
h.
C/S T.006, Cospas-Sarsat Orbitography Network Specification;
i.
C/S T.009, Cospas-Sarsat GEOLUT Performance Specification and Design
Guidelines;
j.
C/S T.011, Description of the 406 MHz Payloads Used in the Cospas-Sarsat GEOSAR
System; and
k
C/S T.020, Cospas-Sarsat MEOLUT Commissioning Standard.
-END OF SECTION 1-
2-1
2.
GEOLUT COMMISSIONING
2.1
General
The Cospas-Sarsat GEOLUT commissioning requirements defined in this document are intended to be
performed in addition to national acceptance tests, and are required prior to fully integrating a
GEOLUT into the Cospas-Sarsat Ground Segment. Conducting the tests detailed in this document and
assessing the results is the responsibility of the national Administration desiring to commission the
GEOLUT.
The commissioning requirements detailed herein verify the GEOLUT's ability to receive and process
signals transmitting in the 406 MHz band in accordance with the Cospas-Sarsat GEOLUT Performance
Specification and Design Guidelines (C/S T.009). Consequently each specification detailed in
document C/S T.009 has associated commissioning requirements detailed herein. A matrix identifying
the requirements in document C/S T.009 and the corresponding sections in this document is provided
at Annex I. All tests required to commission the GEOLUT shall be conducted with the GEOLUT in
its operational configuration and location, and connected to the associated MCC. However, the data
should not be distributed to other Cospas-Sarsat Ground Segment Operators.
For multiple GEOLUT installations, each GEOLUT shall be commissioned individually and as if it
were a stand-alone GEOLUT. A GEOLUT which is capable of operating with more than one type of
GEOSAR satellite shall be commissioned separately for each type. The national Administration may
conduct the testing and submit the commissioning reports for each of the GEOLUT / type of GEOSAR
satellite combination to the Cospas-Sarsat Secretariat separately or at the same time.
2.2
Pre-Test Requirements
Prior to commencing the testing portion of the commissioning programme, the national Administration
conducting the tests shall co-ordinate with the appropriate authorities in its SAR region, as well as
notify all affected Cospas-Sarsat MCCs, of the test periods and the test beacon location(s). This
information shall also be provided to the Cospas-Sarsat Secretariat. The time and dates for performing
commissioning tests should be chosen such that the operational impact of the testing on the LEOSAR
system is minimized.
2.3
Test Data Collection
The GEOLUT commissioning process involves collecting specified numbers of error free 406 MHz
beacon messages. As test transmissions in the 406 MHz band will be detected and processed by other
LEOLUTs, GEOLUTs, and MCCs, it is desirable to complete the tests as quickly as possible in order
to reduce the volume of non-emergency messages handled by other national Administrations.
2.4
Frequency Registration
Administrations should register their use of the downlink frequency band processed by their GEOLUTs
with the International Telecommunication Union (ITU) in accordance with article 11 of the radio
regulations. The information required to notify GEOLUTs is identified at Annex H. The ITU only
2-2
accepts notification requests submitted in electronic format and has developed a software application,
available free of charge from their web site, which captures the required information and produces the
necessary electronic file. A separate GEOLUT notification should be filed with the ITU for each type
of GEOSAR satellite with which the GEOLUT operates.
2.5
Data Collection Limitation
Only the data collected from those GEOSAR satellites that comply with the document Description of
the 406 MHz Payloads Used in the Cospas-Sarsat System (C/S T.011) should be used for the statistical
data analysis. Data for GEOLUT commissioning purposes should be collected only from
commissioned GEOSAR satellites, and not from GEOSAR satellites in initial operational capability
(IOC) status.
2.6
Submission of Results
The national Administration wishing to commission a GEOLUT into the Cospas-Sarsat System, shall
submit a commissioning report (as detailed at Annex A) for a review by the Joint Committee or an
Expert Working Group (EWG) tasked by the Cospas-Sarsat Council to review LUT commissioning
reports. In addition, the data specified at Annex D shall be submitted to the Cospas-Sarsat Secretariat
for evaluation, retention, and distribution to Participants. Revisions or updates to commissioning
reports should be provided to the Secretariat with a clear indication given on the cover page of the
sections that have been revised and a short description of the nature of the revisions.
Those items not in compliance with the specification shall be highlighted in the appropriate portions
of the commissioning report.
2.7
GEOLUT Commissioning and Integration
The decision to approve the commissioning of a GEOLUT will be based on the information contained
in the GEOLUT commissioning report provided by the national Administration. The commissioning
report will be reviewed by the experts of the Joint Committee or an EWG tasked by the Cospas-Sarsat
Council to review LUT commissioning reports. The GEOLUT will be integrated into the Cospas-
Sarsat Ground Segment as described in Annex F and Annex G.
2.8
Confirmation of Requirements
The national Administration shall confirm compliance to all requirements detailed in this document
with either a measurement, verification, declaration, or combination of these methods. The exact
method of confirming compliance for each requirement is summarized at Annex I.
A measurement requires the national Administration to conduct a test and include the supporting data
as part of the commissioning report. A verification requires a national Administration to test a
requirement, however, supporting data does not need to be provided as part of the commissioning
report. A declaration of compliance confirms that specific requirements are met although not
necessarily tested as part of the commissioning process. Conformance to all requirements shall be
documented in the commissioning report.
2-3
2.9
Change of Location
If the location of a commissioned GEOLUT has been changed, the responsible national
Administrations shall ensure that the GEOLUT continues to satisfy C/S T.009 requirements prior to
resuming operations. Additionally, the national Administrations shall:
a)
confirm that the level of local interference does not adversely affect GEOLUT
performance;
b)
verify the performance of the communication links in the new location;
c)
verify the performance of the antenna and RF subsystems; and
d)
update the technical file of the GEOLUT commissioning report (Appendix 1 to
Annex A refers) by providing a declaration that the GEOLUT satisfies C/S T.009
requirements and the following information, to the Cospas-Sarsat Secretariat:
i.
Antenna Characteristics (Annex A, Appendix 1, section A.2.1),
ii.
General GEOLUT Indoor Equipment Description (Annex A, Appendix 1,
section A.2.2) - identify any changes to the equipment configuration, or indicate
“no change” if the configuration has not been changed,
iii.
General GEOLUT Support Equipment Description (Annex A, Appendix 1,
section A.2.3) - identify any changes to the list of frequency reference beacons,
or indicate “no change” if the configuration has not been changed,
iv.
General Capabilities (Annex A, Appendix 1, section A.2.3) - identify any
changes to the general capabilities of the GEOLUT, or indicate “no change” if
appropriate,
v.
Communications Capability (Annex A, Appendix 1, section A.4),
vi.
Coverage (Annex A, Appendix 1, section A.5),
vii.
Location (Annex A, Appendix 1, section A.6).
-END OF SECTION 2-
3-1
3.
EVALUATION OF OPERATIONAL REQUIREMENTS
3.1
GEOLUT Data Availability
The GEOLUT data availability shall be measured during the commissioning period in accordance with
guidance provided at Annex B. If any basic function or requirement is not performed by the GEOLUT,
the GEOLUT shall be considered unavailable for that time period.
3.2
Data Requirements
The national Administration shall verify that the GEOLUT satisfies the data requirements detailed at
document C/S T.009. This will ensure that the GEOLUT provides the data necessary for the associated
MCC to distribute alert data according to the document C/S A.002 (SID). This shall be verified and
noted in the appropriate section of the GEOLUT commissioning report.
3.3
Satellite Tracking Capability
The national Administration shall conduct tests and record the measurements in accordance with
Annex B, to demonstrate that the GEOLUT is capable of continuously receiving the downlink signal
from the GEOSAR satellite. In addition, the national Administration shall declare that the GEOLUT
is capable of detecting and processing beacon signals in the entire uplink bandwidth that is used by the
selected GEOSAR satellite for operational beacons.
3.4
Satellite Visibility
The national Administration shall verify the elevation angle between the GEOLUT and all the satellites
with which it may operate, and report this information in the appropriate section of the GEOLUT
commissioning report.
3.5
Status and Alarm
The national Administration shall describe the status and alarm functions of the GEOLUT and declare
compliance to the appropriate section of document C/S T.009 (GEOLUT specification) in the
GEOLUT commissioning report.
3.6
RF Radiation and Emissions
The national Administration shall verify that the GEOLUT does not radiate or emit any radio frequency
signals that will interfere with the functioning of the Cospas-Sarsat System. This shall be declared in
the appropriate section of the GEOLUT commissioning report.
3.7
Interference
The national Administration shall verify the GEOLUTs ability to operate in the presence of interfering
3-2
signals in the beacon to GEOSAR uplink signal, the GEOSAR to GEOLUT downlink signal, and in
the GEOLUTs local site environment. Conformance to this specification shall be documented in the
GEOLUT commissioning report.
3.8
Data Archiving
The national Administration shall describe the data archiving capability of the GEOLUT and
declare compliance in the appropriate section of the GEOLUT commissioning report.
- END OF SECTION 3 -
4-1
4.
EVALUATION OF FUNCTIONAL AND PROCESSING REQUIREMENTS
4.1
Functional Requirements
4.1.1
Antenna and RF Subsystem
The national Administration shall verify and document in the GEOLUT commissioning report that the
antenna and RF subsystem of the GEOLUT can acquire and continuously receive the downlink signal
from the GEOSAR satellite(s) with which the GEOLUT will operate.
4.1.2
Time and Frequency Reference Subsystems
The national Administration shall declare, in the GEOLUT commissioning report, the GEOLUTs
ability to satisfy time and frequency reference requirements detailed in document C/S T.009.
The GEOLUT may use one or more reference beacon signals to maintain the frequency stability
required to meet the specification. The identification of any such reference beacon(s) shall be included
in the GEOLUT Commissioning Report.
4.1.3
MCC Interface
The national Administration shall verify that the GEOLUT provides timely alert data of the level of
quality and detail as specified in document C/S T.009. This will enable the associated MCC to satisfy
the requirements of documents C/S A.002 (SID) and C/S A.005 (MCC Specification). This verification
shall be documented in the GEOLUT commissioning report.
4.2
Processing Requirements
The national Administration shall conduct tests and, record the results in the appropriate section of the
commissioning report, which confirm the GEOLUTs compliance to the “processing requirements”
detailed in document C/S T009.
These tests require the GEOLUT to process the 406 MHz data described at Annex C in the manner
prescribed. The processing consists of bit verification, message validation, message processing and
transmission. The specific beacon test messages contained at Annex C can be transmitted by a test
beacon or a beacon simulator.
National Administrations should ensure that test beacons or simulators are capable of transmitting the
beacon messages in the manner and at the frequencies described at Annex C. Alternatively, national
Administrations may arrange for the simulators in the United States or France to uplink the messages
contained at Annex C.
If the test messages cannot be transmitted during the commissioning period, the national
Administration may develop alternative methods of confirming compliance with the beacon message
processing requirements and proceed with the commissioning test, and preparation and submission of
the commissioning report. The unavailability of the test beacon or simulators to uplink the test shall
4-2
not prevent the GEOLUT from being commissioned, if other adequate methods are used. If alternative
methods are used, these methods shall be completely documented in the commissioning report.
- END OF SECTION 4 -
5-1
5.
EVALUATION OF PERFORMANCE REQUIREMENTS
5.1
Performance Requirements Testing
The national Administration shall conduct tests and record the associated measurements to demonstrate
that the GEOLUT satisfies the following C/S T.009 performance specifications:
a)
processing performance;
b)
frequency measurement; and
c)
capacity.
The detailed test procedures, required analysis, and reporting requirements are detailed at Annex B.
The identifier(s) of the test or reference beacon(s) used to evaluate the frequency stability of the
GEOLUT shall be reported in the Commissioning Report. None of these test beacons may be any of
the beacon(s) used as a frequency reference beacon (as described in paragraph 4.1.2).
5.2
Performance Requirements Verification
The national Administration shall verify that the GEOLUT satisfies the System downlink fading
specification and the requirement concerning false alerts caused by processing anomalies, detailed in
document C/S T.009. This verification shall be documented in the GEOLUT commissioning report.
- END OF SECTION 5 -
ANNEXES TO
COSPAS-SARSAT
GEOLUT COMMISSIONING STANDARD
A-1
ANNEX A - GEOLUT COMMISSIONING REPORT
Country or National Administration: ________________
Location of GEOLUT:
________________
Cospas-Sarsat Identifier:
________________
Start of Commissioning Period:
________________
End of Commissioning Period: ________________
Section 1.0 contains a summary of the commissioning results as well as the declarations (D) and the
verifications (V) by the national Administration for requirements not specifically measured.
The organization of the summary table follows the requirements contained in document C/S T.009.
Section 2.0 contains the results of measurements (M) used to support the results presented in
section 1.0. A copy of the associated data is provided in ASCII format as required by document
C/S T.010. A technical description of the GEOLUT is presented in Appendix 1.
A-2
1.0
Summary Table
Table A.1 - GEOLUT Commissioning Summary Data Table (General Part)
Paragraph
in
C/S T.009
Requirement or Test
Pass Criteria
Result
Pass/
Fail
Method of
Compliance
Declaration/Verification or
Comments
3.1
GEOLUT Data
Availability
A0.95
M
3.2
Data Requirements
C/S T.009 refers
N/A
V
3.3
Satellite Tracking
Capability
L=0 (applicable
for satellites with
downlink carrier)
Full BW
M or D
D
D
Measurement for carrier lock (L)
is only applicable for satellites
with a downlink carrier. For
satellites without a downlink
carrier a declaration is required
that the GEOLUT maintains
satellite track at all times.
Declaration is required for full
GEOSAR satellite bandwidth
(BW) processing.
The GEOLUT shall be capable
of operating without degradation
in all operational modes of the
selected GEOSAR satellite.
3.4
Satellite Visibility
EL5
V
If EL < 5 , include description
of RF noise suppression system
in the technical file
3.5
Status and Alarm
Reporting
C/S T.009 refers
N/A
D
3.6
RF Radiation and
Emissions
C/S T.009 refers
N/A
V
3.7
Interference
C/S T.009 refers
N/A
V
3.8
Data Archiving
C/S T.009 refers
N/A
D
3.9
QMS Continuous
Monitoring and
Objective Assessment
C/S T.009 refers
N/A
V
Verify that GEOLUT transmits
QMS data to the MCC
complying with the message
transmission rate as defined in
C/S A.003 document (e.g.,
every 20 minutes).
4.1.1
Antenna and RF
Subsystem
C/S T.009 refers
N/A
V
4.1.2
Time and Frequency
Reference Subsystems
TA10 msec
FS5x109
(15 mins)
D
TA = Time Accuracy
FS = Frequency Stability
4.1.3
MCC Interface
C/S T.009 refers
N/A
V
M-Measurement, D-Declaration, and V-Verification
The definitions of Measurement, Declaration, and Verification are provided at section 2.8.
A-3
Table A.2 - GEOLUT Commissioning Summary Data Table (C/S T.001 Beacons Part)
Paragraph
in
C/S T.009
Requirement or Test
Pass Criteria
Result
Pass/
Fail
Method of
Compliance
Declaration/Verification or
Comments
See
Paragraph
2.2.4.B to
C/S T.001
Bit Rate Tolerance
Check
Test - BR1
M/N > 0.75
n/a
M
4.2.2.1
Beacon Message
Recovery
Test MR1
See Annex C to
C/S T.010
M
Beacon Message
Recovery
Test MR2
See Annex C to
C/S T.010
M
4.2.3.1
Bit Verification
Test BV1
See Annex C to
C/S T.010
M
Bit Verification
Test BV2
See Annex C to
C/S T.010
M
Bit Verification
Test BV3
See Annex C to
C/S T.010
M
4.2.4.1
Beacon Message
Validation
Test MV1
See Annex C to
C/S T.010
M
4.2.5.1
4.2.5.2
4.2.5.3
Beacon Message
Processing
Test MP1
See Annex C to
C/S T.010
M
Test ELT(DT)
Functional Validation
See Annex C to
C/S T.010
M
4.2.6
Redundant Alert Data
C/S T.009 refers
V
4.2.7
Updated Location
Data
C/S T.009 refers
V
4.2.8
Bit Shifted Beacon
Messages
V
Does not produce bit-shifted
messages.
4.2.9
Special National
Processing
Requirements
C/S T.009 refers
N/A
D,V
Confirm that special national
requirements do not affect
international operational data
quality.
5.1.1
Processing
Performance
Test PP1
95% of beacons
within 5 minutes
(23 beacons)
M
5.2
Frequency
Measurement
95% of Alerts
 2 Hz
M,V
Measurement to confirm 95%
within 2 Hz.
Verification that measurement
based on most recent frequency
data.
5.3
Capacity
20 beacons
V
5.4
Processing Anomalies
V
5.5
Downlink Fading
LM  0 dB
V
Provide the Link Margin (LM)
calculation in the technical file.
M-Measurement, D-Declaration, and V-Verification
The definitions of Measurement, Declaration, and Verification are provided at section 2.8.
A-4
Table A.3 - GEOLUT Commissioning Summary Data Table (C/S T.018 Beacons Part)
Section in
C/S T.009
Requirement or
Test
Pass Criteria
Result
Pass/
Fail
Method of
Compliance
Declaration / Verification or
Comments
4.2.2.1
Beacon Message
Recovery - MR1
See Annex C.1.2
to C/S T.010
M
Beacon Message
Recovery - MR2
See Annex C.1.2
to C/S T.010
M
4.2.3.2
Bit Verification -
BV1
See Annex C.1.2
to C/S T.010
M
4.2.5.1
4.2.5.4
4.2.5.5
Beacon Message
Processing MP1
See Annex C.1.2
to C/S T.010
M
ELT(DT) Functional
Validation
See Annex C.1.2
to C/S T.010
M
4.2.6
Redundant Alert Data
C/S T.009 refers
V
4.2.7
Updated Location Data
C/S T.009 refers
V
4.2.8
Bit Shifted Beacon
Messages
V
Does not produce bit-shifted
messages.
4.2.9
Special National
Processing
Requirements
C/S T.009 refers
D,V
Confirm that special national
requirements do not affect
international operational data
quality.
5.1
Processing
Performance Test
PP1
TBD
M
Signal sensitivity
Signal sensitivity
better than
[30.55] dB-Hz
D
5.2
Frequency
Measurement
V
Frequency measurement shall
be provided, but no frequency
accuracy requirement is
defined.
5.3
Capacity
140 beacons
n/a
D
5.4
Processing Anomalies
V
5.5
Downlink Fading
LM  0 dB
V
Provide the Link Margin (LM)
calculation in the technical file.
5.6.5
Processing Bandwidth
406.006 to
406.094 MHz
D
5.6.6
Acquisition Frequency
Range
Beacon with a
deviation from the
center frequency of
406.05 ± 1.65 kHz
D
A-5
2.0
Results of Measurements
This section contains the detailed results of the measurements summarized in section 1.0. Each
requirement, and its associated test procedure, is further described in the annex and section as
referenced below. For example, the detailed procedures for conducting the GEOLUT Data Availability
Test is described at Annex B section B.3.1 to document C/S T.010.
Detailed statistical results for the following measurements shall be provided.
B.3.1 GEOLUT Data Availability (A)
B.3.2 Satellite Tracking Capability
B.4
Processing Requirements (comprised of Message Recovery (MR), Bit Verification (BV),
Message Validation (MV), and Message Processing (MP) beacon simulator tests)
B.5.1 Processing Performance (PP1)
B.5.2 Frequency Measurement (including the identifier(s) of the beacon(s) used to verify the
frequency stability).
3.0
Other Information
3.1
Confirmation that the test beacons and/or beacon simulators used for the commissioning tests
satisfy the requirements stated in C/S T.001.
3.2
A list of all 406 MHz beacon messages used for the commissioning tests (see Annex B.2).
A-6
Appendix 1 Technical File
A.1
GENERAL
This appendix defines the GEOLUT information to be provided by the national Administration for
GEOLUT commissioning. The following minimum information is required.
A.2
GEOLUT HARDWARE DESCRIPTION
A.2.1
ANTENNA CHARACTERISTICS
a.
size and type of antenna
b.
the gain to noise temperature ratio (G/T) measured at an elevation angle greater than
five (5) degrees above the local horizon. The actual elevation angle at which the G/T
was measured shall be reported. If the elevation angle is less than five degrees, include
a description of the RF noise suppression system used by the GEOLUT
c.
operational limitations
d.
dedicated or shared antenna system
e.
link margin calculation for each type of GEOSAR satellite with which the GEOLUT
will operate
A.2.2
GENERAL GEOLUT INDOOR EQUIPMENT DESCRIPTION
a.
GEOLUT manufacturer and model number
b.
equipment complement
c.
stand alone, shared, or co-located with a LEOLUT and/or MCC
A.2.3
GENERAL GEOLUT SUPPORT EQUIPMENT DESCRIPTION
a.
Frequency stability reference beacon identifier(s).
A.2.4
GENERAL CAPABILITIES
a.
processing capability (indicate the upper and lower frequency limits of the 406.0 to
406.1 MHz SAR band that the GEOLUT will process). If the processing bandwidth is
selectable, indicate what selections are available
b.
interference monitoring capability
c.
a description of the GEOLUTs status and alarm capabilities
A-7
A.3
PROCESSING
a.
specific performance capability
b.
manufacturers specifications
c.
false alert from processing anomaly suppression mechanism
d.
bit shift suppression mechanism
e.
a general description of the GEOLUTs implementation of the beacon message
confirmation process
A.4
COMMUNICATIONS CAPABILITY
a.
primary mode configuration
b.
secondary (backup) mode configuration
A.5
COVERAGE
a.
list all GEOSAR satellites of the selected type with which the GEOLUT is designed to
operate
b.
elevation angle to each GEOSAR satellite of the same type with which the GEOLUT
could operate
c.
operational tracking (azimuth and elevation) limits of motion
A.6
LOCATION
a.
latitude and longitude of the antenna unit. This location shall be given to within
100 meters and shall be given with respect to the Bureau International de lHeure (BIH)
Geodetic Reference System with a reference ellipsoid semi-major axis of
6378137 meters and a flattening (ellipticity) of 1/298.2572
b.
altitude above mean sea level in meters
A.7
GEOLUT TO MCC ALERT MESSAGES
Copies of the GEOLUT to MCC alert messages associated with the signals emitted by the beacon
simulator shall be included in this section. These messages shall be annotated to highlight the alert
and the associated test signal.
- END OF ANNEX A -
B-1
ANNEX B - STATISTICAL REQUIREMENTS
B.1
GENERAL
This annex describes the test procedures, and the statistical elements that the national Administration
is to provide to the Cospas-Sarsat Secretariat for all tests and measurements required to commission a
GEOLUT. Data used to create these statistics must satisfy the criteria for inclusion detailed at Annex
E. A list of all 406 MHz beacons used for the statistical analysis shall be provided in accordance with
section B.2. The statistical information provided to the Cospas-Sarsat Secretariat shall be summarised
and included in the main portion of the commissioning report, as described at Annex A. Additionally,
the analysis and calculations used to derive the summarised information shall be documented, and also
included in the commissioning report as detailed at Annex A.
B.2
406 MHZ BEACONS USED
All 406 MHz beacon messages used in the generation of these statistical results / analysis shall be listed
in the commissioning report. Furthermore, except for the special signals generated to test the limits of
the GEOLUTs capabilities, the national Administration shall confirm that the beacon signals and
messages generated satisfied the requirements of document C/S T.001 (beacon specification).
B.3
OPERATIONAL REQUIREMENTS - STATISTICAL DATA ELEMENTS
B.3.1
GEOLUT DATA AVAILABILITY (A)
This test shall be conducted by monitoring the GEOLUT operational performance during a 7 day period
(minimum), with a view to determining GEOLUT availability. The GEOLUT data availability (A) is
defined as: A = [1-(DT/T)] x 100 and shall be greater than or equal to 95, where T = test period and
DT = elapsed time during the test period, during which any GEOLUT basic function or requirement
cannot be performed.
The values for A, DT, and T shall be reported.
B.3.2
SATELLITE TRACKING CAPABILITY
This test shall be conducted by monitoring the duration that the GEOLUT lost carrier lock on the
GEOSAR satellites downlink carrier signal during a seven-day period (minimum) of operational use.
L = the elapsed time that the GEOLUT lost carrier lock on the GEOSAR satellite's downlink carrier
signal during the test period. L shall be equal to zero.
The value for L and the duration of the test period shall be reported.
B-2
B.4
PROCESSING REQUIREMENTS - STATISTICAL DATA ELEMENTS
This test demonstrates the GEOLUTs ability to satisfy the processing requirements documented in
section 4.2 of document C/S T.009.
The preferred procedure to be used to validate these requirements is by using a beacon simulator to
transmit a series of beacon message test scripts detailed at Annex C. The resulting alert data produced
by the GEOLUT shall be analysed and compared to the expected results for each script. The national
Administration shall report the following in a tabular format:
a.
the identification of each test script (provided to the national Administration by the
beacon simulator provider);
b.
the date and time that each beacon activation occurred;
c.
the expected result(s) for each beacon activation;
d.
the actual result(s) produced by the GEOLUT for each beacon activation; and
e.
an indication of whether the GEOLUT satisfied the applicable processing
requirements.
If a suitable beacon simulator is not available, then this test may be performed using a software
simulator connected directly to the GEOLUT (as opposed to beacon simulators which radiate signals).
The beacon simulator shall replicate the beacon message test scripts that were developed for the beacon
simulator. These test scripts are detailed at Annex C.
B.5
PERFORMANCE REQUIREMENTS - STATISTICAL DATA ELEMENTS
B.5.1
PROCESSING PERFORMANCE
This test demonstrates the GEOLUTs ability to satisfy the processing performance requirements
detailed in document C/S T.009.
The preferred procedure to validate this requirement is to use a beacon simulator to radiate the beacon
message test scripts detailed at Annex C. Before the test scripts are activated, the national
Administration shall liaise with the provider of the beacon simulator to calibrate the radiated power
level of the beacon simulator to produce the required C/No at the GEOLUT. Upon completion of the
test, the resulting alert data produced by the GEOLUT shall be analysed and compared to the expected
results for each script. The national Administration shall report the following:
a.
the identification of each test script (provided to the national Administration by the
beacon simulator provider);
b.
the date and time that each test script was run;
c.
the beacon alert message transmitted for each beacon activation;
d.
the actual beacon alert message produced by the GEOLUT for each beacon activation;
e.
the time duration required by the GEOLUT to provide a suitable valid message; and
B-3
f.
an indication of whether the GEOLUT satisfied the applicable processing
requirements.
If a suitable beacon simulator is not available, then this test may be performed using real beacons
whose output power can be adjusted. If this procedure is used, then the number of beacon signals, their
duration, and power levels shall replicate the beacon test scripts detailed at Annex C.
B.5.2
FREQUENCY MEASUREMENT
This test measures the ability of the GEOLUT to measure the transmitted frequency of beacons signals
to the specifications detailed in document C/S T.009.
The preferred procedure to validate this requirement is to use orbitography or reference beacons with
known frequency performance characteristics. For each valid beacon message processed by the
GEOLUT, the difference between GEOLUT measured frequency and the actual transmitted frequency
shall be calculated and documented. The largest, average and smallest frequency differences shall be
reported. Furthermore, the ratio of messages with frequency measurements accurate to within 2 Hz to
the total number of valid beacon messages shall be calculated and documented. This ratio shall be
0.95 or better. The frequency specifications of the orbitography or reference beacons used in this test
shall be confirmed and reported. A minimum of 100 measurements shall be made for this test.
If suitable orbitography or reference beacons are not within the satellite coverage area then a beacon
simulator can be used. The simulator shall radiate the beacon messages detailed at Annex C. For each
valid beacon message processed by the GEOLUT, the difference between GEOLUT measured
frequency and the actual transmitted frequency shall be calculated and documented. The largest,
average and smallest frequency differences shall be reported. Furthermore, the ratio of messages with
frequency measurements accurate to within 2 Hz to the total number of valid beacon messages shall
be calculated and documented. This ratio shall be 0.95 or better. The frequency specifications of the
beacon simulator shall be confirmed and reported.
The identifier(s) of the test or reference beacon(s) used to verify the frequency stability of the
GEOLUT shall be reported in the commissioning report.
- END OF ANNEX B -
C-1
ANNEX C - BEACON SIMULATOR TEST SCRIPT
C.1
TEST MESSAGES TO BE TRANSMITTED
C.1.1
C/S T.001 BEACONS
Test
Code
Sequence
Simulator
Transmit
Frequency
(MHz)
Date /Time
(UTC)
Transmitted
30 Hex Transmitted Code
(9-bit Frame Synchronization)
Number of Bit Errors
Comments
PDF-1
BCH-1
PDF-2
BCH-2
Bit Rate Tolerance Check (BR)
BR1
[TBD]
406.025
[TBD]
96EEF9DA0A2BA9EB5F96F400000F19
Transmit 20 bursts at the higher end of the permissible Bit
Rate Range (396 bps)
[TBD]
406.025
[TBD]
96EEF9DA0A2BA9EB5F96F400000F19
Transmit 20 bursts at the lower end of the permissible Bit
Rate Range (404 bps)
Message Recovery (MR)
MR1
USA
406.025
6 Bursts
50s spacing
56EE0000000000477BEAC000000000
(1 1010 1111)
n/a
n/a
USA, User Test coded beacon with two bit errors in 9-bit
frame synchronization at bits 16 and 17.
MR2
USA
406.027
6 Bursts
50s spacing
96EF000049C14CD260D5F608380389
(0 1101 0000)
USA, National Location Protocol Test Coded beacon with
encoded position (38.995, -76.851) with the last eight bits of
the frame synchronization inverted.
Bit Verification (BV)
BV1
USA
406.025
56EE1100000000037E540000000111
(0 0010 1111)
n/a
n/a
USA, User Test coded beacon with two (2) bit errors
introduced at bits 44 and 48 in PDF-1. Spurious data in BCH-
2.
406.025
x + 50s
56EE0000000000037E540000000111
(0 0010 1111)
n/a
n/a
USA, User Test coded beacon with no bit errors.
406.025
x + 100s
56EE1100000000037E540000000111
(0 0010 1111)
n/a
n/a
USA, User Test coded beacon with two (2) bit errors
introduced at bits 44 and 48 in PDF-1. Spurious data in BCH-
2.
406.025
x + 150s
56EE0000000000037E540000000111
(0 0010 1111)
n/a
n/a
USA, User Test coded beacon with no bit errors.
406.025
x + 200s
56EE1100000000037E540000000111
(0 0010 1111)
n/a
n/a
USA, User Test coded beacon with two (2) bit errors
introduced at bits 44 and 48 in PDF-1. Spurious data in BCH-
2.
406.025
x + 250s
56EE0000000000037E540000000111
(0 0010 1111)
n/a
n/a
USA, User Test coded beacon with no bit errors.
BV2
USA
406.027
6 Bursts
50s spacing
D6E10E1A4324920458B9D555555555
(0 0010 1111)
USA, Orbitography beacon with a pattern of A01" in the long
message. No bit errors.
BV3
USA
406.025
20 Bursts
50s spacing
D6EEAAAAAAAAAAA2EA1A24E14CD2F4
(0 0010 1111)
USA, User Test coded beacon with encoded position (38.885,
-76.931) in PDF-2. One bit error at bit 138.
Message Validation (MV)
MV1
USA
406.025
6 Bursts
50s spacing
96EE0000002729A5E22BB61B872E0A
(0 0010 1111)
USA, Standard Location Protocol Test coded beacon with
encoded position (38.855, -76.931) in PDF-1 and PDF-2.
C-2
Test
Code
Sequence
Simulator
Transmit
Frequency
(MHz)
Date /Time
(UTC)
Transmitted
30 Hex Transmitted Code
(9-bit Frame Synchronization)
Number of Bit Errors
Comments
PDF-1
BCH-1
PDF-2
BCH-2
Message Processing
MP1
USA
406.023
96EFFFFFDFC0FF01F6E8B30000090E
(0 0010 1111)
USA, National Location Protocol Test coded beacon with
default position.
406.023
x + 50s
96EFFFFFDFC0FF01F6E8B30000090E
(0 0010 1111)
Same as above.
406.023
x + 100s
96EFFFFFDFC0FF01F6E8B30000090E
(0 0010 1111)
Same as above.
406.023
x + 150s
96EFFFFFDFC0FF01F6E8B30000090E
(0 0010 1111)
Same as above.
406.023
x + 200s
96EFFFFFDFC0FF01F6E8B30000090E
(0 0010 1111)
Same as above.
406.023
x + 250s
96EFFFFFDFC0FF01F6E8B30000090E
(0 0010 1111)
Same as above.
406.023
96EFFFFFC9C14CE4BAA57708080AA8
(0 0010 1111)
USA, National Location Protocol Test coded beacon with
updated position (38.995, -76.931).
406.023
96EFFFFFC9C14CE4BAA57708080AA8
(0 0010 1111)
Same as above.
406.023
96EFFFFFC9C14CE4BAA57708080AA8
(0 0010 1111)
Same as above.
406.023
96EFFFFFC9C14CE4BAA57708080AA8
(0 0010 1111)
Same as above.
406.023
96EFFFFFC9C14CE4BAA57708080AA8
(0 0010 1111)
Same as above.
406.023
96EFFFFFC9C14CE4BAA57708080AA8
(0 0010 1111)
Same as above.
Processing Performance
PP1
USA
406.02700
6 Bursts
Start at x
56EE000004000002510CC000000000
(0 0010 1111)
USA Test coded beacon, decimal value 2 in bits 40-63.
406.02704
6 Bursts
Start at x + 2s
56EE0000060000061D9CC000000000
(0 0010 1111)
USA Test coded beacon, decimal value 3 in bits 40-63.
406.02708
6 Bursts
Start at x + 4s
56EE00000A0000056C758000000000
(0 0010 1111)
USA Test coded beacon, decimal value 5 in bits 40-63.
406.02712
6 Bursts
Start at x + 6s
56EE00000E000004432D4000000000
(0 0010 1111)
USA Test coded beacon, decimal value 7 in bits 40-63.
406.02716
6 Bursts
Start at x + 8s
56EE000016000002A0FFC000000000
(0 0010 1111)
USA Test coded beacon, decimal value 11 in bits 40-63.
406.02720
6 Bursts
Start at x + 10s
56EE00001A000001D1168000000000
(0 0010 1111)
USA Test coded beacon, decimal value 13 in bits 40-63.
PP1 (contd)
USA
(contd(
406.02724
6 Bursts
Start at x + 12s
56EE000022000007FE7AC000000000
(0 0010 1111)
USA Test coded beacon, decimal value 17 in bits 40-63.
406.02728
6 Bursts
Start at x + 14s
56EE000026000006D1220000000000
(0 0010 1111)
USA Test coded beacon, decimal value 19 in bits 40-63.
406.02732
6 Bursts
Start at x + 16s
56EE00002E0000048F938000000000
(0 0010 1111)
USA Test coded beacon, decimal value 23 in bits 40-63.
406.02736
6 Bursts
Start at x + 18s
56EE00003A0000011DA84000000000
(0 0010 1111)
USA Test coded beacon, decimal value 29 in bits 40-63.
C-3
Test
Code
Sequence
Simulator
Transmit
Frequency
(MHz)
Date /Time
(UTC)
Transmitted
30 Hex Transmitted Code
(9-bit Frame Synchronization)
Number of Bit Errors
Comments
PDF-1
BCH-1
PDF-2
BCH-2
406.02740
6 Bursts
Start at x + 20s
56EE00003E00000032F08000000000
(0 0010 1111)
USA Test coded beacon, decimal value 31 in bits 40-63.
406.02744
6 Bursts
Start at x + 22s
56EE00004A000004F5080000000000
(0 0010 1111)
USA Test coded beacon, decimal value 37 in bits 40-63.
406.02748
6 Bursts
Start at x + 24s
56EE00005200000216DA8000000000
(0 0010 1111)
USA Test coded beacon, decimal value 41 in bits 40-63.
406.02752
6 Bursts
Start at x + 26s
56EE00005600000339824000000000
(0 0010 1111)
USA Test coded beacon, decimal value 43 in bits 40-63.
406.02756
6 Bursts
Start at x + 28s
56EE00005E0000016733C000000000
(0 0010 1111)
USA Test coded beacon, decimal value 47 in bits 40-63.
406.02760
6 Bursts
Start at x + 30s
56EE00006A00000439B6C000000000
(0 0010 1111)
USA Test coded beacon, decimal value 53 in bits 40-63.
406.02764
6 Bursts
Start at x + 32s
56EE000076000003F53C8000000000
(0 0010 1111)
USA Test coded beacon, decimal value 59 in bits 40-63.
406.02768
6 Bursts
Start at x + 34s
56EE00007A00000084D5C000000000
(0 0010 1111)
USA Test coded beacon, decimal value 61 in bits 40-63.
406.02772
6 Bursts
Start at x + 36s
56EE0000860000052F67C000000000
(0 0010 1111)
USA Test coded beacon, decimal value 67 in bits 40-63.
406.02776
6 Bursts
Start at x + 38s
56EE00008E00000771D64000000000
(0 0010 1111)
USA Test coded beacon, decimal value 71 in bits 40-63.
406.02780
6 Bursts
Start at x + 40s
56EE000092000000BD5C0000000000
(0 0010 1111)
USA Test coded beacon, decimal value 73 in bits 40-63.
406.02784
6 Bursts
Start at x + 42s
56EE00009E000003CCB54000000000
(0 0010 1111)
USA Test coded beacon, decimal value 79 in bits 40-63.
406.02788
6 Bursts
Start at x + 44s
56EE0000A6000005E3D90000000000
(0 0010 1111)
USA Test coded beacon, decimal value 83 in bits 40-63.
406.02792
6 Bursts
Start at x + 46s
56EE0000B200000071E2C000000000
(0 0010 1111)
USA Test coded beacon, decimal value 89 in bits 40-63.
406.02796
6 Bursts
Start at x + 48s
56EE0000C200000599428000000000
(0 0010 1111)
USA Test coded beacon, decimal value 97 in bits 40-63.
C/S T.001 ELT(DT) Functional Validation Script
The validation of the specific management of ELT(DT) alerts at GEOLUT level shall use the script “C/S T.001 ELT(DT) Functional Validation Script”
defined in Annex D of document C/S T.020.
C-4
C.1.2
C/S T.018 BEACONS
Test Code
Sequence
Simulator
Transmit
Frequency
(MHz)
Date/Time
(UTC)
Transmitted
63 Hex Transmitted Message
(23 Hex Identifier)
Number of Bit Errors
Comments
PDF
BCH
Message Recovery (MR)
MR1
[TBD]
406.05
[TBD]
See MR1 script defined in section D.1.2 of document C/S T.020
Transmit bursts with normal mode PRN
MR2
[TBD]
406.047
[TBD]
See MR2 script defined in section D.1.2 of document C/S T.020
Transmit 20 bursts at the lower limit of the
processing bandwidth
Bit Verification (BV)
BV1
[TBD]
406.050
[TBD]
See BV1 script defined in section D.1.2 of document C/S T.020
Transmit bursts with 6 bit errors on
PDF+BCH
Message Processing (MP)
MP1
FR
406.050
3FFF1B0038CFF83E0FFFC1FE00000000000BFFF000007FFFE
50A0D7299FC30E
(9C77FFF1B00F00000000000)
France, National Location Protocol Test
coded beacon with default position.
406.050
x + 50s
3FFF1B0038CFF83E0FFFC1FE00000000000BFFF000007FFFE
50A0D7299FC30E
(9C77FFF1B00F00000000000)
Same as above.
406.050
x + 100s
3FFF1B0038CFF83E0FFFC1FE00000000000BFFF000007FFFE
50A0D7299FC30E
(9C77FFF1B00F00000000000)
Same as above.
406.050
x + 150s
3FFF1B0038CFF83E0FFFC1FE00000000000BFFF000007FFFE
50A0D7299FC30E
(9C77FFF1B00F00000000000)
Same as above.
MP1
(cont)
406.050
x + 200s
3FFF1B0038CFF83E0FFFC1FE00000000000BFFF000007FFFE
50A0D7299FC30E
(9C77FFF1B00F00000000000)
Same as above.
406.050
x + 250s
3FFF1B0038CFF83E0FFFC1FE00000000000BFFF000007FFFE
50A0D7299FC30E
(9C77FFF1B00F00000000000)
Same as above.
406.050
x + 300s
3FFF1B0038C95C7BE00BD8CE00000000000BFFF0000004C0
05811CA719BE531
(9C77FFF1B00F00000000000)
France, National Location Protocol Test
coded beacon with updated position
(Toulouse, 43.56049, -1.48083).
C-5
406.050
x + 350s
3FFF1B0038C95C7BE00BD8CE00000000000BFFF0000004C0
05811CA719BE531
Same as above.
406.050
x + 400s
3FFF1B0038C95C7BE00BD8CE00000000000BFFF0000004C0
05811CA719BE531
(9C77FFF1B00F00000000000)
Same as above.
406.050
x + 450s
3FFF1B0038C95C7BE00BD8CE00000000000BFFF0000004C0
05811CA719BE531
Same as above.
406.050
x + 500s
3FFF1B0038C95C7BE00BD8CE00000000000BFFF0000004C0
05811CA719BE531
(9C77FFF1B00F00000000000)
Same as above.
406.050
x + 550s
3FFF1B0038C95C7BE00BD8CE00000000000BFFF0000004C0
05811CA719BE531
(9C77FFF1B00F00000000000)
Same as above.
[Processing Performance (PP)]
[PP1]
USA
See C/S T.018 Performance Evaluation Script defined in section
D.3 in document C/S T.020
C/S T.018 ELT(DT) Functional Validation Script
The validation of the specific management of ELT(DT) alerts at GEOLUT level shall use the script “C/S T.018 ELT(DT) Functional Validation Script”
defined in Annex D of document C/S T.020.
C-6
C.2
EXPECTED PROCESSING
C.2.1
C/S T.001 BEACONS
Test
Code
Sequence
Message to be Transmitted by GEOLUT
Comments
BR1
96EEF9DA0A2BA9EB5F96F400000F19
GEOLUT sends a valid message to the MCC.
MR1
n/a
GEOLUT should suppress these messages due to bit errors in the frame synchronization.
MR2
n/a
GEOLUT should suppress these messages due to the inverted frame synchronization.
BV1
56EE0000000000037E540000000000
GEOLUT should correct bit errors in PDF-1 and set bits 113 to 144 all to “0” for short format message.
BV2
D6E10E1A4324920458B9D555555555
GEOLUT should transmit orbitography beacon message without error correcting the long message.
BV3
D6EEAAAAAAAAAAA2EA1A24E14CD2B4
GEOLUT should correct error at bit 138 and transmit alert to MCC.
MV1
96EE0000002729A5E22BB6FFFFFFFF
GEOLUT should set bits 113 to 144 all to “1”.
MP1
96EFFFFFDFC0FF01F6E8B30000090E
GEOLUT should transmit the confirmed message with default position.
96EFFFFFC9C14CE4BAA57708080AA8
GEOLUT should transmit confirmed, completed updated message.
PP1
Various
GEOLUT should be able to process at least 23 beacons and transmit to MCC.
C/S T.001 ELT(DT) Functional Validation Script
For the FGB ELT(DT) functional validation test, it should be verified that each received burst results in an alert message sent to the associated MCC.
C.2.2
C/S T.018 BEACONS
Test
Code
Sequence
Message to be Transmitted by GEOLUT
Comments
MR1
n/a
GEOLUT should suppress these messages due to bit errors in the frame synchronization.
MR2
n/a
GEOLUT should suppress these messages due to the inverted frame synchronization.
BV1
See BV1 expected processing section C.2.2 of
document C/S T.020
GEOLUT should correct bit errors using the BCH.
MP1
3FFF1B0038CFF83E0FFFC1FE00000000000BFFF0
00007FFFE50A0D7299FC30E
GEOLUT should transmit the confirmed message with default position.
3FFF1B0038C95C7BE00BD8CE00000000000BFFF0
000004C005811CA719BE531
GEOLUT should transmit confirmed, completed updated message.
[PP1
Various
GEOLUT should be able to process at least TBD beacons and transmit to MCC]
C/S T.018 ELT(DT) Functional Validation Script
For the SGB ELT(DT) functional validation test, it should be verified that each received burst results in an alert message sent to the associated MCC.
C-7
C.3
REPORTING GUIDELINES
National Administrations shall complete the sections referencing 406 MHz beacon message processing
requirements, processing performance, and system beacon capacity in the GEOLUT Commissioning
Report provided at Annex A. A copy of the GEOLUT message to the associated MCC shall be
included for each test code sequence which requires a message to be transmitted. The copies should
be included in appendix 1 to the GEOLUT Commissioning Report. For situations where the GEOLUT
to MCC message includes several alerts, the message shall be annotated in a manner which identifies
the alert and its associated requirement (i.e. the alert associated with test bit verification 1 (BV1) should
be highlighted and annotated with the words BV1).
-END OF ANNEX C-
D-1
ANNEX D - DATA FORMAT
D.1
GENERAL
This annex describes the data format to be provided to the Cospas-Sarsat Secretariat separately from a
commissioning report. The data is to be provided in three separate electronic text files, one for the
tracking database (section D.2), the solution data (section D.3), and the beacon database (section D.4).
The data is to be provided in a comma (,) delimited format, and each field shall include an entry. If
there is no data for any given field, then a blank space is to be inserted into the appropriate portion of
the file. All data used in the commissioning testing are to be provided.
A description of the fields is provided below:
Field
Relative position of the field
Description
Description of the information provided
Format
Guidance on how the data should be provided (i.e. n - numeric character, s -
sign, H - hexadecimal, and C - alphabetic character)
Width
The total number of bytes for the field. If this value includes a decimal point,
the number to the right of the decimal point signifies the number of decimal
places. For example, 5.3 would indicate a total width of 5 digits with one digit
to the left of the decimal point, one occupied by the decimal point itself, and
the remaining three digits to the right of the decimal point.
D.2
TRACKING DATABASE
Field
Description
Format
Width
GEOLUT ID
nnnn
Satellite ID
G or I and nn\*
Start Time
dd/mm/yyyy/hh/min min/ss**
Stop Time
dd/mm/yyyy/hh/min min/ss
\*
G or I represents GOES and INSAT respectively, and the nn captures the satellite number (i.e.,
G09 would represent GOES-9)
**
Provide all dates and times in this format, with the time in UTC. Include slashes (/) as indicated
in the format to show the separation in the time fields.
D-2
D.3
GEOLUT DATABASE FOR SOLUTION DATA
Field
Description
Format
Width
GEOLUT ID
nnnn
Location Name in plain text
CCC…CCC
3 (i)
Satellite ID
G or I and nn
The data in fields 4 to 13 provides information
pertaining to the transmitted signal for each
beacon activation
Beacon Script reference number
CCCCC
Beacon Script sequence number
CCCCC
6 (ii)
Beacon ID transmitted (15 hex)
HHH…HHH
Beacon data transmitted (30 hex)
HHH…HHH
8 (iii)
Transmit Location Latitude
snn.nnn
7.3
9 (iv)
Transmit Location Longitude
snnn.nnn
8.3
Encoded Location (Yes / No)
Y or N
Transmit Power in watts
n.n
3.1
Transmit Frequency in MHz
nnn.nnn
7.3
Time of activation (for each simulated or real
activation)
see section D.2
Time of de-activation (for each simulated or real
activation)
see section D.2
Number of bursts transmitted in activation
nn
Comments pertaining to transmitted signal
CCC…CCC
The fields 17 to 29 provide data pertaining to
the information determined / received by the
GEOLUT for each beacon activation
17(v)
Beacon message (as measured by the GEOLUT at
the end of integration, 30 hex)
HHH…HHH
First valid beacon message transmitted to MCC,
30 hex)
HHH…HHH
First confirmed beacon message transmitted to
MCC (30 hex)
HHH…HHH
Time valid message sent to MCC (leave blank if
message not validated)
see section D.2
Time confirmed message sent to MCC (leave
blank if message not confirmed)
see section D.2
Number of bursts integrated to calculate alert
nn
D-3
Field
Description
Format
Width
Time of first burst used in integration
see section D.2
Time of last burst used in integration
see section D.2
Received signal frequency in MHz
nnn.nnn
7.3
Received signal to noise density ratio in dB-Hz nn.n
4.1
27 (iii)
Beacon location latitude (only for encoded
location transmissions
snn.nnn
7.3
28 (iv)
Beacon location longitude (only for encoded
location transmissions)
snnn.nnn
8.3
Value of frame synchronisation bits
nnnnnnnnn
(i)
G or I represents GOES or INSAT respectively, and the nn captures the satellite number (i.e.
G09 would represent GOES-9).
(ii)
For tests involving location protocols with updates to the location during the test, each update
shall be reported as a separate beacon activation.
(iii)
The sign (s) is positive (+) for northern latitudes and negative (-) for southern latitudes.
(iv)
The sign (s) is positive (+) for eastern longitudes and negative (-) for western longitudes.
(v)
This is the value of the beacon message as measured/determined by the GEOLUT at the end
of the integration process. The value of the message shall be that which was
measured/processed directly by the GEOLUT (i.e. with no changes to bits 113 to 144 for
unconfirmed location protocol long messages).
D.4
BEACON DATABASE DESCRIPTION
Field
Description
Format
Width
1 (i)
Beacon Simulator ID
CCC…CCC
2 (ii)
Location Latitude
snn.nnn
7.3
3 (iii)
Location Longitude
snnn.nnn
8.3
4 (iv)
Beacon ID
HHH…HHH
(i)
Provide identifier of simulator, or provide a blank space if a real beacon was used.
(ii)
The sign (s) is positive (+) for northern latitudes and negative (-) for southern latitudes.
(iii)
The sign (s) is positive (+) for eastern longitudes and negative (-) for western longitudes.
(iv)
Use the 15 hex ID associated with the beacon or simulator.
-END OF ANNEX D-
E-1
ANNEX E - TEST CONDITIONS
E.1
GENERAL
This annex defines the test conditions, and criteria for including and excluding test result data in the
GEOLUT commissioning report.
E.2
BEACONS
All tests performed for GEOLUT commissioning purposes shall be conducted using type approved
Cospas-Sarsat beacons coded with the test protocol or a beacon simulator (where appropriate). The
sole exception is when specific tests cannot be conducted with type approved beacons (i.e. processing
threshold test). Except for the frequency measurement test, orbitography or reference beacons that are
in the GEOSAR satellite's uplink field of view are not to be used for commissioning tests.
The concept of a beacon activation is used in the test procedures detailed at Annex B and the data
requested at Annex D. A beacon activation is defined as the beacon's signal being transmitted through
a GEOSAR satellite for a predetermined number of times at the beacon burst repetition rate defined in
document C/S T.001, and a GEOLUT output message being generated and the beacon's signal being
turned off. In this manner a beacon activation is to represent and/or simulate how a beacon would be
used operationally. If the same beacon signal is to be reused later, sufficient time between the
activations must be allowed for the previous beacon's signal to be removed from the GEOLUT's
processor memory.
E.3
SOLUTION STATISTICS
GEOLUT output messages meeting one or more of the following criteria shall be eliminated from the
statistics:
a.
messages known to have been interfered with by other emitters in the 406 MHz band
in the GEOSAR satellite's uplink field of view;
b.
messages received from beacons located such that their elevation angle to the
GEOSAR satellite is less than four (4) degrees from the local horizon; and
c.
messages known to have been received during periods of interference by the LEOSAR
satellites with the GEOSAR satellites' downlink signals.
In cases where the GEOLUT was not able to satisfy document C/S T.009 requirements or the minimum
standards for testing as documented herein because of situations described above, then the affected
tests shall be redone.
E.4
SOLUTION DATA
The GEOLUT output messages shall be provided for all test and orbitography beacons used during the
test period.
-END OF ANNEX E-
F-1
ANNEX F - GEOLUT COMMISSIONING - PRINCIPLES AND POLICIES
F.1
REFERENCES
The Cospas-Sarsat Council approved the general principles of its commissioning policy for GEOLUTs,
provided hereunder in Sections F.2, F.3, and F.4, at its Twenty-First Session.
F.2
GENERAL
The following principles govern the commissioning of Cospas-Sarsat Ground Segment equipment:
F.2.1
A State which has notified its association with the Cospas-Sarsat Programme as a Ground
Segment Provider assumes the responsibility "to adhere to the technical specifications
and operating procedures set by the Council for the purpose of ensuring adequate System
performance" and "to provide, as agreed with the Council, appropriate performance data
in order to confirm compatibility of its Ground Segment equipment with the System"
(Section 3.1 of the Letter of Notification).
F.2.2
Cospas-Sarsat performance standards and design guidelines of GEOLUTs and MCCs are
defined in documents C/S T.009 and C/S A.005, respectively.
F.2.3
Cospas-Sarsat criteria and test methods for verifying that GEOLUTs and MCCs meet
these standards are defined in documents C/S T.010 and C/S A.006, respectively.
F.2.4
The responsible Agency or Administration installing or planning to operate a new
GEOLUT or MCC shall plan and conduct appropriate tests, in accordance with the
applicable Cospas-Sarsat standards, which may form part of its own acceptance testing.
F.2.5
A commissioning report, including the results of the commissioning tests defined by
Cospas-Sarsat, shall be submitted to the Cospas-Sarsat Secretariat, for review by the
Joint Committee or an EWG established by the Cospas-Sarsat Council to review LUT
commissioning reports and be subsequently submitted by the Ground Segment Provider
as per the meeting submission deadline.
F.2.6
After review of the commissioning report, appropriate recommendations to the Cospas-
Sarsat Council are made. Formal commissioning is recorded at the subsequent Council
meeting, after approval of the recommendation by the Council.
F-2
F.2.7
This commissioning and reporting procedure shall be implemented by all Cospas-Sarsat
Ground Segment operators, including Parties to the International Cospas-Sarsat
Programme Agreement, for commissioning new GEOLUTs and MCCs or new
equipment or functions which have a significant impact on the Cospas-Sarsat Ground
Segment operation.
F.2.8
The cost of implementing the commissioning procedure and reporting to Cospas-Sarsat
is borne by the operating Agency or Administration installing the equipment to be
commissioned.
F.2.9
Ground Segment equipment will be commissioned into the Cospas-Sarsat System only
if the formal association of the GEOLUT and the MCC operator with the Cospas-Sarsat
Programme has been notified in accordance with the standard procedure, unless
otherwise agreed by the Council.
F.3
GEOLUT COMMISSIONING
The following principles govern the implementation of the Cospas-Sarsat GEOLUT Commissioning
Standard (C/S T.010):
F.3.1
The implementation of the commissioning procedure defined in document C/S T.010 is
the responsibility of the operating Agency or Administration.
F.3.2
The operating Agency or Administration will be responsible for equipment which may
be required for performing the commissioning tests.
F.3.3
For a GEOLUT to be commissioned it must be connected to its associated MCC.
F.3.4
The GEOLUT/MCC interface is tested as part of the GEOLUT commissioning.
F.3.5
If the test results in the commissioning report submitted by the operating Agency or
Administration do not demonstrate full compliance with document C/S T.009 (GEOLUT
performance specification), corrective action shall be taken.
F.3.6
If the test results in the commissioning report submitted by the operating Agency or
Administration do demonstrate full compliance with document C/S T.009 (GEOLUT
performance specification), the alert data derived from the new GEOLUT can be
immediately used by the associated MCC for distribution in accordance with the Cospas-
Sarsat Data Distribution Plan (C/S A.001).
F-3
F.3.7
Once the alert data derived from the new GEOLUT begins to be used by the associated
MCC, a change of System status shall be distributed to all MCCs by the associated MCC,
in accordance with the procedure of document C/S A.001.
F.3.8
The Joint Committee or an EWG established by the Council for the purpose reviews the
LUT commissioning report and recommends to the Cospas-Sarsat Council, as
appropriate, formal commissioning of the GEOLUT.
F.4
STATUS OF THE COSPAS-SARSAT GROUND SEGMENT
F.4.1
After their commissioning, GEOLUTs are listed and described as appropriate in the
applicable System documents and the "Cospas-Sarsat System Data" document.
F.4.2
The Cospas-Sarsat GEOLUTs commissioned in the Cospas-Sarsat System shall be listed
on the Cospas-Sarsat website www.cospas-sarsat.org.
-END OF ANNEX F-
G-1
ANNEX G - GUIDELINES FOR INTEGRATION OF NEW GEOLUTS IN THE
COSPAS-SARSAT SYSTEM
The introduction of new GEOLUTs in the Cospas-Sarsat System is supervised by the Joint Committee
or an EWG body tasked by the Cospas-Sarsat Council to review LUT commissioning reports whose
objectives support:
a)
the improvement of the overall performance of the Cospas-Sarsat Ground Segment; and
b)
the technical control of the development of the Cospas-Sarsat LUTs.
The guidelines hereunder, and Figure G.1, provide procedures for integrating a new GEOLUT into the
Cospas-Sarsat Ground Segment.
1.
Installation of New Equipment - The new GEOLUT(s) equipment should be sited to provide for
good reception from the GEOSAR satellite with which it is to operate. The location of the
GEOLUT(s) should also allow for reliable communications with the associated MCC.
2.
GEOLUT Description - The national Administration should ensure that a description of the new
GEOLUT(s) along with (1) co-ordinates, (2) address, and (3) uplink frequency bandwidth are
provided to the Cospas-Sarsat Secretariat.
The national Administration should also ensure that their GEOLUT(s) is (are) properly
registered with the International Telecommunications Union (ITU). The forms provided in
Annex H to this document should be completed and forwarded to ITU through the appropriate
national authorities.
3.
Commissioning Test - For new Ground Segment Providers, the GEOLUT Commissioning tests
may be scheduled to coincide with the MCC commissioning tests. In any case, the GEOLUT
should be connected to the MCC and tested in its operational configuration.
The GEOLUT Operator should ensure that test beacon(s) capable of transmitting the test code
sequences contained in Annex C is (are) available for the commissioning test, or the GEOLUT
Operator should co-ordinate with beacon simulator providers in the USA or France for the
transmission of such code sequences. If test beacons/simulators cannot be used during the
commissioning test, the GEOLUT Operator should ensure that an alternative method of
confirming compliance is identified.
The relevant sections of this document describe the operational, functional and processing, and
performance requirements to be tested. During the test, the data from the GEOLUT(s) should
be transmitted to the associated MCC, however, the data should be suppressed by the MCC and
not transmitted within the Cospas-Sarsat System.
4.
Preparation of Commissioning Report - The results of the tests, along with the proper
declarations and verifications for items not specifically tested, should be documented in a
commissioning report. Annex A to this document contains the format of the commissioning
report.
G-2
The commissioning report should include as a minimum the information requested in this
document and in the format contained in Annex A. In addition, information to explain or clarify
results should also be included in the commissioning report.
Any anomaly, or failure to meet a requirement, observed during the commissioning test should
be corrected and the requirement re-tested. After the GEOLUT satisfies the requirements of
document C/S T.009, “Cospas-Sarsat GEOLUT Performance Specification and Design
Guidelines,” the completed commissioning report should be submitted by the national
Administration to the Cospas-Sarsat Secretariat.
5.
Initial Operational Capability (IOC) - If the commissioning test has been completed successfully,
and the commissioning report has been forwarded to the Cospas-Sarsat Secretariat, the GEOLUT
may begin operations in an IOC status. However, the GEOLUT cannot reach IOC status prior
to the MCC IOC date if the associated MCC is also in the commissioning process. The national
Administration, through its associated MCC, should notify all Ground Segment Operators of a
GEOLUTs IOC status via a System Status message.
The IOC phase allows a thorough review of the GEOLUT performance. However a GEOLUT
shall not remain in an IOC phase for more than one year. GEOLUTs that have not reached FOC
within one year will be considered not operational, and documented as “Under Development”.
To regain IOC status the GEOLUT will require a retest of the elements which prevented it from
reaching FOC. The GEOLUT then must operate again in an IOC phase prior to reaching FOC.
All Cospas-Sarsat Ground Segment Operators should monitor the data from new GEOLUTs for
any significant anomalies that could impact Cospas-Sarsat operations.
6.
Full Operational Capability (FOC) - If after 90 days of operation in an IOC state no anomalies
are detected in the performance of the GEOLUT, the GEOLUT should be declared at FOC by
the appropriate nodal MCC. The transition of a GEOLUT from an IOC status to a FOC status
ensures that the GEOLUT performs to Cospas-Sarsat standards and does not negatively impact
System operations.
7.
Formal Commissioning - The Joint Committee or an EWG established by the Cospas-Sarsat
Council for the purpose reviews the commissioning report and, pending additional details or
explanations, provides recommendations on the approval of the report and the commissioning
of the GEOLUT into the Cospas-Sarsat Ground Segment to the Council. The Council approves
the recommendation and decides that the GEOLUT is formally commissioned in the Cospas-
Sarsat Ground Segment.
8.
GEOLUTs with Limited Data Availability - A GEOLUT which does not satisfy document
C/S T.009 data availability requirements (e.g. GEOLUTs which share equipment with
LEOLUTs) will be authorised to provide their alert data into the System upon the successful
completion of the GEOLUT commissioning tests. Such GEOLUTs will follow the integration
process described in this annex for full time GEOLUTs, however, such equipment will not be
reported as operational GEOLUTs when reporting the status of the System.
G-3
Figure G.1: Overview of GEOLUT Integration
-END OF ANNEX G-
Any
Significant
Anomalies
?
GO Coordinate
with Beacon
Simulator
Providers as
Necessary
Confirm
to C/S
T.009?
GO* Install
GEOLUT
Equipment
Begin Process to
Register LUTs
with ITU
GO Submit
Report to C/S
Secretariat
Ground Segment
Description to
C/S Secretariat
GO Prepare
Required
Documentation
GO Perform
Commissioning
Test
GO Analyze
Test
Results/Prepare
Report
GEOLUT
Begins Operations
at IOC
GEOLUT
Operator Take
Corrective
Action
Council
Formally
Commissions
GEOLUT
JC or EWG on LUT
Commissioning Evaluates
Report and
Recommends
Commissioning
NM** Declares
GEOLUT at FOC
C/S System
Monitors for
Anomalies
Report is
submitted for
review
Yes
No
Yes
No
\*GO: GEOLUT Operator
**NM: Nodal MCC
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H-1
ANNEX H - GUIDELINES FOR REGISTRATION OF GEOLUTS WITH ITU
To Be Developed
- END OF ANNEX H -
I-1
ANNEX I - GEOLUT REQUIREMENTS MATRIX
Requirement / Specification
Section in
C/S T.009
Section in
C/S T.010
Method of
Compliance in
C/S T.010
GEOLUT Availability
3.1
3.1
M
Data Requirements
3.2
3.2
V
Satellite Tracking Capability
3.3
3.3
M or D, D
Satellite Visibility
3.4
3.4
V
Status and Alarm Reporting
3.5
3.5
D
RF Radiation and Emissions
3.6
3.6
V
Interference
3.7
3.7
V
Antenna and RF Subsystem
4.1.1
4.1.1
V
Time and Frequency Reference
System
4.1.2
4.1.2
D
MCC Interface
4.1.3
4.1.3
V
Processing Requirements
4.2
4.2
M
Processing Performance
5.1
5.1.a
M
Frequency Measurement
5.2
5.1.b
M
Capacity
5.3
5.1.c
V
Processing Anomalies
5.4
5.2
V
Downlink Fading
5.5
5.2
V
M - Measurement, D- Declaration, V - Verification
The definitions of Declaration and Verification are provided at section 2.8.
- END OF ANNEX I -
- END OF DOCUMENT -
Cospas-Sarsat Secretariat
1250 René-Lévesque Blvd. West, Suite 4215, Montreal (Quebec) H3B 4W8 Canada
Telephone: +1 514 500 7999
Fax: +1 514 500 7996
Email: mail@cospas-sarsat.int
Website: www.cospas-sarsat.int