Study of a New Method about Improving the Positioning Accuracy of Dual-satellites Passive Location System

Yanrong Xue, Juan Du, Yuwei Li, Wenli Wang, Xin Zhang

Peer Reviewed

Abstract:	Dual-satellite passive location system is a passive location method basing on time-and-frequency-difference of arrival (TDOA and FDOA), simultaneously the time difference and frequency difference information of the same radiation source on the ground getting to the two satellites is measured to determine the location of the signal source. At present, the positioning accuracy being obtained by using the current technology is 10?20 km, which is not accurately enough to know the position of the radiation source. In order to improve the positioning accuracy of the system, combining with differential technology of positioning error correction in Global Navigation Satellite System (GNSS) and the principle of time-and-frequency-difference of arrival of the dual-satellite passive location system, a new method, that is wide-area pseudo-range differential method basing on TDOA and FDOA of dual-satellite passive location is proposed. According to the present positioning parameter, the simulation results show that, the positioning accuracy of the system can be improved greatly and precede 5km, even 4km for some distance, meanwhile, the available range of this method in the positioning area will be wider, alternative reference radiation source become much more, after wide-area pseudo-range differential, which has taken an very important step for improving positioning accuracy of dual-satellite passive location and has important theoretical and application value as well as practical value for improving its availability and the reliability of positioning result of the dual-satellite passive location system for the future development of the dual-satellite passive location system.
Published in:	Proceedings of the ION 2017 Pacific PNT Meeting May 1 - 4, 2017 Marriott Waikiki Beach Resort & Spa Honolulu, Hawaii
Pages:	211 - 216
Cite this article:	Xue, Yanrong, Du, Juan, Li, Yuwei, Wang, Wenli, Zhang, Xin, "Study of a New Method about Improving the Positioning Accuracy of Dual-satellites Passive Location System," Proceedings of the ION 2017 Pacific PNT Meeting, Honolulu, Hawaii, May 2017, pp. 211-216. https://doi.org/10.33012/2017.15085
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