- 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>
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>
