Radiosonde recovery app
SondeAlert is an Android app for discovering and recovering previously landed radiosondes. It combines locally stored radiosonde data with map tools, filters and field alerts to help you plan and carry out a recovery.
01 / ABOUT
SondeAlert is not a live flight tracker. It is built specifically for radiosondes that have already landed and may still be recoverable.
The app stores selected radiosonde records locally, shows useful recovery targets around you and supports the final search with map information, filters, favourites and configurable detection alerts.
02 / APP HIGHLIGHTS
A compact look at the parts of SondeAlert you will use most — from theme options and map filters to offline preparation and recovery settings.
SondeAlert supports both light and dark themes so the interface stays readable during daytime searches and easier on the eyes after sunset.
Narrow the local dataset by sonde family, status, distance, year and altitude so the map only shows recovery targets that are useful to you.
Download radiosonde data for another location before you leave, so your next recovery area is ready when you get there.
Fine-tune map behaviour, detection preferences and app settings without cluttering the main recovery screen.
03 / ABOUT THE APP
SondeAlert is an Android app for finding previously landed radiosondes. It turns historical landing records into practical recovery targets and gives you the tools needed for the search on the ground.
From a database record to a real-world recovery.
Choose an area and SondeAlert downloads the relevant radiosonde records to your device. The app then uses that local dataset to show nearby landed sondes, calculate distances, apply filters and provide detection alerts while you search.
SondeAlert is not a live flight tracker. It is intentionally focused on what happens after a sonde has landed.
THE IDEA
Find it. Recover it. Log it.Discover a useful target, use its last known position as your starting point, recover the sonde if possible and record the result.
Prepare radiosonde data for your current area or a location you plan to visit.
Find previously landed sondes nearby and narrow the results with filters.
Use distance information, map context and configurable field alerts.
Use the last known position as the starting point for the final search.
Last known position ≠ exact landing position. A sonde can move after its final recorded position. Treat the coordinate as a search starting point, not as a guarantee of where the sonde will be found.
04 / FAQ
No. SondeAlert focuses on radiosondes that have already landed and uses their last known positions as recovery targets.
Radiosonde records, filters, distance calculations and detection can use the local database. Map tiles may still require internet unless they are cached.
Your position is used to show your location, calculate distance to nearby sondes and power detection and search-zone features.
Yes. The last known position is a search starting point, not a guarantee. Wind, water, people, animals or terrain may move a sonde after its final recorded position.
SondeAlert uses radiosonde records provided through Radiosondy.info. The map is rendered with MapLibre and uses map data from OpenStreetMap contributors.
SUPPORT SONDEALERT
SondeAlert is an independent project developed in my spare time. If you enjoy the app and would like to support continued development, testing and future features, you can help through Ko-fi.
