mckero
3612e662e7
Grey meant two different things. The API caps at 500 records however many hours are requested: measured against the live endpoint, a 72-hour request returned 500 reports spanning only 49 hours, so the oldest 9.5 hours of the third day had no data at all. Those cells were painted the same grey as "nobody reported", which claimed knowledge we did not have - 352 of 3168 cells on a real page, a third of the third day's column. Slots entirely older than the earliest report in the response now use a lighter grey. Coverage is judged from all reports rather than per satellite: a quiet satellite has no reports of its own, but the slots it shares with the rest of the response were still covered, so it must read as "not heard" rather than "unknown". The two greys are now in the legend, which previously listed only the four active states. That matters more than it sounds: on the live page 81% of cells are "nobody reported" and 11% are outside our data, so a user looking at a mostly-grey row had no way to tell a dead satellite from a gap in what we fetched. The legend chips use a solid dot, so the two greys stay distinguishable despite the 25% alpha background. Strings added to all nine locales. Three tests cover it: a day entirely before the data starts, a day straddling the boundary, and an empty response marking nothing as covered.
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.