mckero
e0900778f0
`submit()` opened with `if (call.length < 3) return`. During a pass the operator typed a callsign, pressed done, and nothing happened - no entry, no message, no way to tell the app had decided against them. None of the logging software surveyed for this work - N1MM+, DXLog, PoLo, HAMRS - discards a submission silently. Validation is deliberately loose, because strictness costs more than it saves. Checked against 28 real callsigns, a typical strict pattern rejects 16 of them: W1AW/4, 2E0ABC, 9A1CCY and SV2ASP/A among others. A pattern permissive enough to accept those also accepts a Maidenhead locator as a callsign. There is no regex that catches typos without throwing away legitimate calls, so CallsignEntry rejects only what cannot be a callsign - empty, one character, illegal characters, all digits, all letters - and reports doubt as a warning that still logs the contact. Two warnings exist. A six-character grid-shaped entry says so, because grid and callsign are exchanged together on FM satellites and the fields sit side by side. A station already worked this pass says so too, without blocking: the same station on a later pass is a legitimate new contact, and contest loggers default to working duplicates - DXLog describes refusing them as an outdated habit. That warning also replaces the duplicate suppression, which was a 300ms window comparing the last callsign, admitted in its own comment to be a workaround. It could silently discard a real second contact, and a set of calls worked this pass is both honest and more useful. It survives configuration changes via rememberSaveable. Not addressed here: the QRZ grid backfill still reads the cookie out of SharedPreferences from inside a composable through LocalContext, and still reports nothing when a lookup fails. IQrzGridLookup is added for that, but wiring it needs the container, the view model and the UI to change together.
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.