mckero
ea125d7db4
Mutation testing found the decision rule was effectively untested. Four defects injected into it - removing the silence guard, comparing shifts instead of tones, never setting the hysteresis anchor, and inverting the comparison - all left the entire suite green. The rule lived inside CwDeepDecoder, which needs an Android Context and a loaded ONNX session, so tests could only restate it, and a restated rule cannot fail when the real one is wrong. CwShiftDecider now holds the rule as a pure class that both the decoder and the tests drive. Its outcome is reported as an enum so the decoder's logging is a presentation concern rather than a second copy of the logic. CwShiftDeciderTest targets each of the four surviving mutants directly. MIN_PROMINENCE lowered from 8.0 to 4.5. Raising it to 8.0 last round overshot: measured on 400 ms windows of keyed CW in noise, a comfortably copyable signal reaches only 7.6-9.0 at 0 dB SNR and 5.2-6.7 at -3 dB, so 8.0 silently refused to shift weak out-of-window signals - the exact failure the feature exists to prevent. Pure noise peaks at 2.2-3.4, so 4.5 keeps zero false positives across 40 noise windows while retaining the weak end. A false tone is worse than a missed one: it moves a good signal out of range, whereas a miss leaves the audio alone until a stronger window arrives. Windows dominated by keying gaps measure 2.4 and are indistinguishable from noise at any threshold; those are skipped. Test files reorganised to match: the decision rule is covered by CwShiftDeciderTest against real code, signal-level properties by CwToneShiftSignalTest, and the restated-logic file it replaces is gone. 80 CW tests pass, golden vectors included.
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.