SondeTry SondeFox in your browser
An interactive mockup of all five screens — Chase, Spectrum, Sondes, Details, and Settings — running on dummy telemetry. It is exactly the layout the app ships, with zero install.
Tap the bottom tabs — Chase, Spectrum, Sondes, Details, Settings
Everything in the frame above runs locally in your browser on canned telemetry; there is no live receiver behind it. The real app decodes 400–406 MHz radiosonde signals from an Airspy Mini or R2 over USB-OTG on Android 10+ — no root, no drivers.
What to look at on each screen
The mockup mirrors the beta build. Here is what each tab does when a real Airspy is feeding the decoder.
Chase
The whole chase loop on one MapLibre map: you (purple), the sonde (amber), the predicted landing (green), with the track line behind it. Note the compass pointer with live distance and bearing, the Start Chase and Mark Recovered controls, and the Signal Hunt heat-map overlay that takes over for the final on-foot search.
Spectrum Tap-to-tune pending
The 400–406 MHz band scan with its peak list — in the real app, auto-lock engages when a sonde header correlates on a peak. One honest note: tap-to-tune is designed but not wired yet, so tapping a peak does not retune the radio in the current beta.
Sondes
Active and recent sondes with type, serial, frequency, altitude, and SNR. In the real app this list also merges in sondes from SondeHub, so you see what other stations are hearing before you have decoded anything locally.
Details
Per-sonde telemetry cards: position, motion, signal quality, PTU — temperature and humidity computed from real RS41 calibration math — plus the landing prediction and the raw frame.
Settings
Airspy gain presets (Quiet rural, Urban, External LNA, Manual), sample rate, and the bias-tee warning toggle; Signal Hunt mode; SondeHub callsign and opt-in upload switches — telemetry and chase-car location sharing are separate toggles, both off by default — with a live upload-status row; and the Experimental section, home of the chirp monitor: off by default, raw PHY bits only, no decryption of encrypted traffic.
Exactly what ships
This mockup is the project's zero-install UI preview: the same five screens as the app, fed dummy telemetry instead of RF. In the real app the layout is identical — the numbers just come from the native libsonde decoder working on live Airspy IQ.
Ready to chase the real thing?
SondeFox is in closed beta. RS41 decoding is validated end to end against synthetic signals — the beta is about proving it over the air, across real phones, antennas, and launch sites. Bring an OTG-capable Android 10+ device and an Airspy Mini or R2.