SSE EventSource connections for AIS, ACARS, VDL2, and radiosonde were
not closed when switching modes, causing fd exhaustion after repeated
switches. Also fixes socket leaks on exception paths in AIS/ADS-B
stream parsers, closes subprocess pipes in safe_terminate/cleanup, and
caches skyfield timescale at module level to avoid per-request fd churn.
Closes#169
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Each SDR mode now includes frequency-specific antenna guidance:
- Pager: VHF/UHF dipole info for 153/929 MHz bands
- 433 MHz Sensors: quarter-wave ground plane for ISM band
- Utility Meters: 912 MHz stock antenna tips and upgrades
- APRS: 2m band dipole and commercial options for 144.39 MHz
- SSTV: V-dipole for ISS reception at 145.800 MHz
- AIS: marine VHF antenna for 162 MHz vessel tracking
- Listening Post: wideband discone recommendation with band table
- Meshtastic: LoRa 915/868 MHz antenna upgrades and placement
- ADS-B: 1090 MHz collinear, commercial options, LNA/placement
Each guide includes antenna type, element lengths, placement tips,
and a quick reference table with key specs for the mode.
https://claude.ai/code/session_01FjLTkyELaqh27U1wEXngFQ
The bias-T checkbox on the main dashboard was not being passed to the
ADS-B and AIS tracking start requests. Added getBiasTEnabled() helper
to each dashboard that reads from shared localStorage, and updated all
start request bodies to include bias_t parameter.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
