mckero
c7bb253981
The ground track is cut into polylines so none of them spans 180 degrees, but the cut only ever appended the outgoing edge point. The next polyline therefore began at the first sample past the meridian - typically around -178 - so the drawn track stopped at the edge on one side and reappeared inland on the other, leaving a visible gap on every orbit that crosses the Pacific. The edge point also reused the *next* sample's latitude, so the closing leg jumped: for 179 -> -178 spanning 14 -> 16 degrees latitude the edge was placed at 16.0 instead of the true crossing at 14.667. Now a crossing closes the current polyline on the edge it leaves through and opens the next one on the opposite edge, both at the interpolated crossing latitude, so the seam is continuous. The split is extracted as the pure internal splitAtAntimeridian/crossingLatitude pair, which also gives feature:map its first unit tests. Verified against a standalone Java probe first (eastward, westward, repeated crossings, and a track hugging the edge without crossing), then as Kotlin tests: restoring the old single-point behaviour fails four of them, and the current code is green alongside :core:domain:test and :feature:roaming:testDebugUnitTest. Also drops the misleading "left/right terminal position" comments: the branch that fires when the previous sample sat near +180 is the eastward crossing, and it correctly closes on +180.
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.