.png){kind=icon}
.png){kind=icon}
Return
Addressing Inaccurate Phase Center Offsets in Precise Orbit Determination for Agile Satellite Missions
.png){kind=icon}
OA
AI
K
T
S
DOI：10.33012/navi.671.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
Incorrect offsets between a satellite's center of mass and its global navigadetermination (POD) of many current Earth observation missions. Based on hardware-in-the-loop simulations, this paper demonstrates the more adverse effects on agile satellites, which perform frequent attitude maneuvers around all spacecraft axes. However, findings obtained from an observability analysis and Monte Carlo simulations indicate that rapid attitude changes enable the direct estimation of otherwise unobservable offsets. Application to the POD of agile satellites leads to a consistent and significant performance improvement in the presence of incorrect phase center offsets. Directly estimated corrections for the phase center offset of Sentinel-6A, which performs slews on several occasions, are consistent with values obtained from other studies via independent methods. These results underscore the possibility of estimating the lever arm for both agile and non-agile satellites in dedicated calibration maneuvers.
Keywords:
agile satellites
phase center offset
precise orbit determination
Sentinel-6
Journal
IF:
2
Papers:
554
Citations:
1.6K
Organization
Cited Papers