Mr. Radar
Guardians of the…
Given the radar pulse returns of a satellite, determine its orbital parameters (assume two-body dynamics). Each pulse has been provided as:
- t, timestamp (UTC)
- az, azimuth (degrees) +/- 0.001 deg
- el, elevation (degrees) +/- 0.001 deg
- r, range (km) +/- 0.1 km
The radar is located at Kwajalein, 8.7256 deg latitude, 167.715 deg longitude, 35m altitude.
Estimate the satellite's orbit by providing the following parameters:
- a, semi-major axis (km)
- e, eccentricity (dimensionless)
- i, inclination (degrees)
- Ω, RAAN (degrees)
- ω, argument of perigee (degrees)
- υ, true anomaly (degrees)
at the time of the final radar pulse, 2021-06-27-00:09:52.000-UTC
Solution Statistics
| observations | 145 |
|---|---|
| solves | 5 |
| points | 304 |
| average solve seconds | 7694 seconds, or about 2 hours |
| stddev solve time | 3978 seconds, or about 1 hour |
Solutions Over Time
| by time | solve count | solve percent |
|---|---|---|
| 2021-06-27 16:00:00 UTC | 1 | 20% |
| 2021-06-27 17:00:00 UTC | 3 | 60% |
| 2021-06-27 18:00:00 UTC | 4 | 80% |
| 2021-06-27 19:00:00 UTC | 5 | 100% |
| 2021-06-27 20:00:00 UTC | 5 | 100% |
solving teams:
solved by 5 teams
| team | solved at | it took |
|---|---|---|
| FluxRepeatRocket | 2021-06-27 15:37:17 UTC | 3470 seconds, or 0.96 hours |
| DiceGang | 2021-06-27 16:37:33 UTC | 7070 seconds, or 1.96 hours |
| vMag | 2021-06-27 16:41:34 UTC | 4549 seconds, or 1.26 hours |
| PPP | 2021-06-27 17:26:23 UTC | 10418 seconds, or 2.89 hours |
| Poland Can Into Space | 2021-06-27 18:10:37 UTC | 12964 seconds, or 3.6 hours |