- Add DopplerTracker class using skyfield for satellite tracking
- Calculate and apply Doppler shift correction (up to ±3.5 kHz at 145.800 MHz)
- Background thread monitors shift and retunes rtl_fm when >500 Hz drift
- New /sstv/doppler endpoint for real-time Doppler info
- Start endpoint accepts latitude/longitude for automatic tracking
Also:
- Add slowrx installation to setup.sh (source build for macOS, apt for Debian)
- Sync observer location to dashboard-specific localStorage keys
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
- Fetch live ISS position from Open Notify API (primary)
- Fallback to "Where The ISS At" API if primary fails
- Remove dependency on potentially outdated local TLE data
- Calculate observer elevation/azimuth using spherical geometry
- Both APIs are free and don't require authentication
This fixes the issue where the ISS position was incorrect due to
the local TLE data being almost a year out of date.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
- Add /sstv/iss-position endpoint that calculates ISS position directly
- Update JS to use new endpoint instead of /satellite/position
- Returns lat, lon, altitude, and optionally elevation/azimuth from observer
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
The test_client approach was failing silently. Now calculates ISS
passes directly using skyfield within the sstv route.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Add slow-scan television decoder for receiving images from ISS.
Includes new Space dropdown in navigation grouping Satellite and SSTV modes.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
