Look up. Tune in.

OrbitSDR brings satellite tracking, camera aiming guidance and USB software-defined radio together on your Android phone. Follow the ISS, amateur-radio satellites and weather satellites, plan your next pass, and explore received signals with a compatible RTL-SDR receiver.

Track satellites from your location
Browse the satellite catalog by category, search by name or NORAD ID, and see a selected satellite's position, altitude, azimuth, elevation and range. View its ground track and next predicted horizon pass, with pass times shown in your phone's local time zone. Set your observer location with GPS or enter coordinates manually.

Find your direction with Sky
Use the back-camera preview with predicted satellite markers, orbit paths and aiming guides. See which satellites are above your horizon and follow a selected target's direction. Estimated receive Doppler helps you understand how satellite motion shifts the signal frequency.

Explore live radio signals
Connect a compatible USB RTL-SDR receiver through USB OTG to view a live spectrum, waterfall and channel-power readings in dBFS. Adjust frequency, measurement bandwidth, sample rate and frequency correction. The USB driver is built in, with RTL-SDR Blog V4 support, so no separate driver app or root access is needed.

Listen to broadcast FM
With a connected receiver and suitable antenna, tune a local FM broadcast station and enable mono audio playback through your phone's speaker.

Keep your catalog ready
Start with a bundled satellite catalog and use saved orbital data offline. Refresh orbital elements online through CelesTrak, with SatNOGS DB as a fallback. Add your own satellites using two-line element sets (TLEs), or remove catalog entries you no longer need.

Choose how you use your phone
No account is required. OrbitSDR has no advertising or analytics SDKs. Camera frames and received radio samples are processed on your phone. You can enter observer coordinates without granting location permission, and enable or disable the camera when you choose. Android backup settings may include saved app data.

Before you begin
Satellite tracking works without a radio receiver. Live radio reception and FM listening require a compatible RTL-SDR USB receiver, a suitable antenna and a phone that supports USB OTG. RTL-SDR Blog V4 is the target receiver for this release; other hardware compatibility varies.

Sky overlays show calculated directions, and satellites may not be visible to the eye or camera. Keep orbital elements current for useful predictions. Radio readings are relative dBFS, not calibrated dBm. This release does not decode weather images or satellite voice channels.

Developed by EnvisionRF LLC.
Support: support@envisionrf.com