A Short-Arc Batch Estimation Strategy Towards Decimetre Level GPS-Based Onboard LEO Orbit Determination

N. Zhou, Y. Feng, W. Enderle

Abstract:	The problem of dynamic orbit determination is that a batch estimator assumes use of sophisticated force and observation models, where tens of parameters are estimated to compensate the orbit and observation errors. In this paper, the short-arc batch estimation techniques are studied in order to achieve decimeter orbit accuracy over a few orbit periods. The technical basis and estimation strategies for the batch estimation will be outlined first. The results from a 24-hour data set collected from SAC-C mission have demonstrated that submetre 3D RMS orbit accuracy can be achieved with a 24h SAC-C data arc. With a data arc of 2-resolutions the batch estimation can achieve a 3D RMS orbit determination accuracy of 1.5m consistently with GPS carrier phase smoothed pseudoranges and broadcast GPS ephemerides. However, the results have also demonstrated the potential that further improvement towards data quality control could lead to 3D RMS orbit accuracy of 50cm with precise IGS GPS orbits and clocks. In general, the proposed orbit estimation strategies could lead to decemetre-level ground-based and onboard autonomous precise LEO orbit determination.
Published in:	Proceedings of the 16th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS/GNSS 2003) September 9 - 12, 2003 Oregon Convention Center Portland, OR
Pages:	2664 - 2670
Cite this article:	Zhou, N., Feng, Y., Enderle, W., "A Short-Arc Batch Estimation Strategy Towards Decimetre Level GPS-Based Onboard LEO Orbit Determination," Proceedings of the 16th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS/GNSS 2003), Portland, OR, September 2003, pp. 2664-2670.
Full Paper:	ION Members/Non-Members: 1 Download Credit Sign In