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feat: Add VHF DSC Channel 70 monitoring and decoding

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- Implement DSC message decoding (Distress, Urgency, Safety, Routine)

- Add MMSI country identification via MID lookup

- Integrate position extraction and map markers for distress alerts

- Implement device conflict detection to prevent SDR collisions with AIS

- Add permanent storage for critical alerts and visual UI overlays
This commit is contained in:
Marc
2026-01-25 04:07:14 -06:00
committed by Smittix
parent 3b238c3c8f
commit b4d3e65a3d
12 changed files with 2781 additions and 5 deletions
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17
utils/constants.py
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@@ -237,3 +237,20 @@ HANDSHAKE_CAPTURE_PATH_PREFIX = '/tmp/intercept_handshake_'
# PMKID capture path prefix
PMKID_CAPTURE_PATH_PREFIX = '/tmp/intercept_pmkid_'
# =============================================================================
# DSC (Digital Selective Calling)
# =============================================================================
# VHF DSC frequency (Channel 70)
DSC_VHF_FREQUENCY_MHZ = 156.525
# DSC audio sample rate for rtl_fm
DSC_SAMPLE_RATE = 48000
# Maximum age for DSC messages in transient store
MAX_DSC_MESSAGE_AGE_SECONDS = 3600 # 1 hour
# DSC process termination timeout
DSC_TERMINATE_TIMEOUT = 3