Plan your amateur radio satellite contacts through the warm glow of a vintage phosphor terminal. PhosphorBeam predicts satellite passes from your location, calculates real-time Doppler frequency correction for uplink and downlink, and tracks active amateur birds on a 3D globe — all in authentic retro CRT style.
FEATURES
- 3D globe with real-time satellite positions, radio footprints, and ground station marker
- Pass predictions for all favourited satellites with quality ratings
- Real-time Doppler correction for uplink and downlink frequencies
- Sky track polar plots and corrected frequency charts per pass
- Transponder database: FM repeaters, SSB/CW linear transponders, digital modes
- 23 bundled amateur satellites with offline support
- Automatic satellite discovery from AMSAT active frequency database
- SGP4 orbital propagation with CelesTrak TLE updates
- Maidenhead grid locator display
- Green phosphor and amber CRT colour themes with scanline effects
- No accounts, no tracking, no clutter
DATA SOURCES
Orbital elements are provided by CelesTrak (public domain). Transponder frequencies are sourced from the AMSAT / palewire amateur satellite database.
SUPPORT
Need help with PhosphorBeam? Whether you have a question about how the app works, want to request a feature, or need to report a problem, you can reach us through the following channels:
- Ask a question — get help with using PhosphorBeam
- Report a bug — let us know if something isn't working
- Request a feature — suggest improvements or new functionality
We aim to respond to all support requests promptly. You can also browse existing issues to see if your question has already been answered.