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Conference Paper
Communication, Ocean, and Meteorological Satellite Orbit Determination Accuracy Improvement
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- Authors
- Yoo La Hwang, Byoung-Sun Lee, Hae-Yeon Kim, Jae Hoon Kim
- Issue Date
- 2008-01
- Citation
- AAS/AIAA Space Flight Mechanics Meeting 2008, pp.1-13
- Publisher
- AAS
- Language
- English
- Type
- Conference Paper
- Abstract
- An operational Orbit Determination and Prediction (ODP) system for geostationary Communications, Ocean, and Meteorological Satellite (COMS) mission requires accurate satellite positioning knowledge to accomplish Image Navigation Registration (INR) on the ground. Ranging and tracking data from single ground station are used for COMS Orbit Determination (OD) in a normal operation. However, the orbital longitude of the COMS is so close to that of satellite tracking site that geometric singularity affects observability. A method to solve azimuth bias of single station in singularity is periodically to apply an estimated azimuth bias using ranging and tracking data of two-station. Although the result of OD using only single station without the estimation of the azimuth bias showed 5-6 km RSS, the difference from truth orbit was reduced by 1-1.5 km when the azimuth bias was corrected.
- KSP Keywords
- Geometric singularity, Ground Station, Image navigation, Orbit determination accuracy, Satellite Tracking, Satellite orbit determination, Satellite positioning, Tracking data, accuracy improvement, meteorological satellite, normal operation