mckero
af96fe1cf0
MapViewModel converts MoonPosition.gha into the sub-lunar longitude with `if (gha <= 180) -gha else 360 - gha`, which is only a valid longitude while gha stays inside 0..360. Nothing enforced that: getMoonPosition relies on `while (teg > 360) teg -= 360` reducing GMST before the single `if (gha < 0) gha += 360` correction, and the raw GMST polynomial is about 3.5e6 degrees today, so losing that one line silently pushes the Moon marker millions of degrees off the map instead of failing loudly. Sweep a synodic month at 37-minute steps (1,167 samples) asserting gha stays in 0..360 and the derived longitude in -180..180, plus a check that the hour angle advances 10-20 degrees per hour. Verified the test has teeth: deleting the teg reduction makes both cases fail; with the current implementation :core:domain:test is green. No production change - the existing code is correct.
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.