C# SGP4 Satellite Prediction Library. Load satellites from TLEs, convert between coordinate systems and reference frames, observe satellites from ground stations, and more.
active 2023-09-08 → 2026-08-07 (UTC)
Activity over time
Daily event counts in the loaded window
Line chart, 1065 days from 2023-09-08 to 2026-08-07. Pushes: 6 total, peak 2 in a day. Pull requests: 2 total, peak 2 in a day. Issues: 12 total, peak 7 in a day. Comments: 13 total, peak 5 in a day. Stars: 16 total, peak 1 in a day.
- Pushes
- Pull requests
- Issues
- Comments
- Stars
Stars, PRs, issues and forks are under-captured in the later part of this window. GH Archive progressively stopped capturing non-push events during 2026 — −95% or worse by the end of the window. Every series here except Pushes fades for that reason, so a decline above reflects the archive, not this repository. Pushes stay reliable throughout, so read them, and the contributor counts derived from them, as the real signal. Data health has the measurements.
Top contributors
Pushes, PRs, issues, reviews and comments — stars and forks excluded, so this is contribution rather than popularity
Recent activity
Latest issues, pull requests and releases
- Issue comment#42parzivail2026-08-07 17:58Port of dnwrnr fixes
- Issue comment#21parzivail2026-05-20 22:17OMM XML, OMM KVN, JSON, and CSV element loading support
- Issue comment#34KrailH2025-12-14 09:52Invalid sign exception due to B* two-digit exponent misaligning TLE columns
- Issue#34KrailH2025-12-12 02:24Invalid sign exception due to B* two-digit exponent misaligning TLE columns
- Issue comment#33parzivail2025-11-14 13:24Performance optimizations and correctness bug fixes
- Issue comment#33gabilan2025-11-14 05:49Performance optimizations and correctness bug fixes
- Issue comment#32parzivail2025-06-20 01:11Small bugfix PR
- Issue#32parzivail2025-06-20 01:11Small bugfix PR
- Issue#29parzivail2025-06-20 00:45FindNextAboveToBelowCrossingPoint fails to find the crossing
- Issue comment#32VE3NEA2025-06-20 00:43Small bugfix PR
- Issue comment#29parzivail2025-06-20 00:43FindNextAboveToBelowCrossingPoint fails to find the crossing
- Issue comment#28parzivail2025-06-20 00:43System.ArgumentOutOfRangeException: The added or subtracted value results in an un-representable DateTime. (Parameter 't')
- Issue#26parzivail2025-06-20 00:40Converting between reference frames
- Issue#24parzivail2025-06-20 00:40The time of the satellite's flight over the Ground Station is calculated incorrectly
- Issue#3parzivail2025-06-20 00:38SPICE support
- Issue#25parzivail2025-06-20 00:38RangeRate seems to be incorrect
- Pull request#31parzivail2025-06-20 00:36
- Issue comment#32parzivail2025-06-20 00:32Small bugfix PR
- Issue#32VE3NEA2025-06-20 00:19Small bugfix PR
- Pull request#31VE3NEA2025-06-20 00:11
- Issue comment#29elm-inzamam2025-05-08 06:49FindNextAboveToBelowCrossingPoint fails to find the crossing
- Issue#30VE3NEA2024-07-04 19:20`clipToStartTime: false` does not work
- Issue comment#29parzivail2024-07-02 23:51FindNextAboveToBelowCrossingPoint fails to find the crossing
- Issue#29VE3NEA2024-07-02 23:38FindNextAboveToBelowCrossingPoint fails to find the crossing
- Issue comment#27parzivail2024-02-13 10:47END TO END SIMULATION OBSERVATION
Totals cover only the window loaded into ClickHouse and count events, not GitHub's lifetime totals — 16 stars here means stars gained during the window, not the repo's star count.