mckero
a25f0fe2cf
Switching "Custom TLE URL" on used to mean "my source AND yours". The map overwrote only
the value keyed "All" and the other 26 built-in sources were still fetched, so pointing
Look4Sat at a mirror, a filtered subset, an offline server or a URL reachable on a censored
network did not stop it hitting Celestrak 26 more times. On a blocked link the real
behaviour was 26 failing requests.
This was a fossil rather than a decision: upstream has satelliteDataUrls as a plain list of
six URLs with no keys and no custom-URL concept, all fetched unconditionally. The fork
turned the list into a keyed map and bolted the override onto one key.
Three things made replacing safe to choose, all checked rather than assumed. Stored
satellites do not disappear, because insertEntries is OnConflictStrategy.REPLACE and
updateFromRemote deletes nothing first, so rows the new source does not mention survive.
The selection is a plain id list and is untouched. What degrades is the type filter for the
skipped keys, which goes stale rather than empty - the last known membership, not a claim
about the current fetch.
The key is now customSourceType ("Other"), not "All". setSatelliteTypeIds early-returns on
"All", so indexing there was always a no-op - satellites from a custom URL were never
reachable by the type filter at all. "Other" is what manual file import already uses, which
is the same meaning: satellites from a source the operator supplied. The existing test
asserted the "All" index, which means it was asserting a no-op; it now checks that no
built-in source is fetched and that the entries land somewhere the filter can see.
A second test covers the switch-off path, which must fetch every built-in source exactly as
before.
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.