Ryan Malloy
5867c54de3
Ported from zleffke/gr-sarsat (2018, GNU Radio 3.7): - Updated Python 2 → Python 3 - Converted XML block definitions to YAML - Added pyproject.toml for modern packaging - Preserved original MIT license Blocks: - biphase_l_decode_bb: Manchester decoder (decim_block) - pds_frame_sync: Frame synchronizer with PDU output - sarp_msg_extract: SARP message splitter/validator
38 lines
934 B
YAML
38 lines
934 B
YAML
id: sarsat_sarp_msg_extract
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label: SARP Message Extractor
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category: '[Sarsat]'
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templates:
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imports: from sarsat import sarp_msg_extract
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make: sarp_msg_extract()
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inputs:
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- label: in
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domain: message
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outputs:
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- label: valid
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domain: message
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- label: invalid
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domain: message
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documentation: |-
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SARP (Search And Rescue Processor) Message Extractor.
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Each 72-byte PDS frame contains three 24-byte SARP messages.
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Each SARP message should start with the sync word 0xD60 (12 bits).
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This block splits incoming PDS frames into individual SARP messages
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and validates the sync word:
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- 'valid' port: Messages with correct sync word (0xD60)
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- 'invalid' port: Messages with incorrect sync word
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Note: Even messages on the 'invalid' port may contain recoverable
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beacon data - check BCH error correction codes.
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Input: PDU from PDS Frame Sync block (72 bytes)
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Output: Individual 24-byte SARP messages
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file_format: 1
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