mckero
baf2a7022d
sendPacket wrote the packet under the lock but read the server response outside it. disconnect() - called concurrently from stop() and from the reconnect path in AprsReporter.reportOnce's catch - nulls and closes writer/reader/socket under the same lock, so the lock-free read raced with it. A probe interleaving 5,000 sends with repeated disconnects produced a mix of 744 OK and 4,256 exception results: the response read hit a just-closed socket and the swallowing runCatching reported Pair(true,"OK") for a packet that may never have left, or read through a stale reference. The tracker believed the beacon was heard while APRS-IS never received it. Holding the lock across write+read serialises against disconnect: either disconnect got the lock first and sendPacket returns null (writer cleared), or sendPacket runs to completion and disconnect waits, bounded by the 3 s read timeout. Re-ran the interleaving probe: 3,000 sends, zero inconsistent results. Compiles and :core:data tests stay green.
Look4Sat: Satellite tracker
Radio satellite tracker and pass predictor for Android, inspired by Gpredict
Track satellite passes with ease!
Thanks to Celestrak and SatNOGS you have access to over 9000 active satellites.
You can search the entire database by NORAD Catalog Number or the satellite's name.
Orbital positions and passes are calculated relative to your location.
To get reliable data make sure to set the station position via the app Settings.
The application is built using Kotlin, Coroutines, Jetpack Compose and Navigation.
It is now and always will be completely ad-free and open-source.
Main features:
- Predicting satellite positions and passes for up to 10 days
- Showing the list of currently active and upcoming satellite passes
- Showing the active pass progress, polar trajectory and transceivers info
- Showing the satellite positional data, footprint and ground track on the map
- Custom TLE satellite data import is available via Three Line Element .txt files
- Offline first: calculations are made offline. Weekly TLE data update is recommended.
License
The Look4Sat application code is licensed under the GNU General Public License v3.0.
The CW decoder in feature/cw bundles the DeepCW
neural decoding model, licensed under the GNU Affero General Public License v3.0 only
(AGPL-3.0-only). Because the combined work incorporates an AGPL-3.0 component, the
combined work is distributed under the
GNU Affero General Public License v3.0 — GPL-3.0 Section 13 permits the
combination, and AGPL-3.0 Section 13 applies to the combined work as a whole.
Model provenance and attribution are documented in
feature/cw/licenses/NOTICE.md; the original GPL-3.0
text is preserved at feature/cw/licenses/Look4Sat-GPL-3.0.txt. The CW model runs
locally on-device and does not provide services over a network.