A Method to Enhance RDSS Based on Receiver Clock Error Modeling

Guoliang Sun and ShiTuan Shen

Abstract:	Radio Determination Satellite Service (RDSS) System provides services by using two geosynchronous satellites. It allows user to get their position and to communication with other users or the master station. RDSS system suits for developing countries or business organizations to build their own local area communication and positioning satellite system for its low cost compared with GPS, GLONASS and GNSS. Geostar system and Localstar system are all RDSS systems that had been built earlier. They had been implemented in North America, Europe and adjacent areas. BD system is also a RDSS system built by China in 1990s. It has been succeeded to be applied to many fields in the country. RDSS has limitations on application, such as limited user amount, longer time lag at positioning, etc. It cause the positioning performance becoming even worse while user moves in high speed or dynamic, especially to plane and automobile. In order to resolve these problems, a method based on receiver clock error modeling was put forward to to improve RDSS. Receiver clock error model was built through round trip time comparison with the master station. User can calculate its own position in real time with the one-way pseudo range corrected by the forecast of the model. Possibility and benefits to enhance RDSS performance with aid of clock error modeling were discussed. Clock error measurement and modeling methods were described in detail. Additionally, it is also partly verified through flying datum. As the result shows that it can not only satisfy the requirement of real-time and precise positioning performance, but also reduce the burden of the ground master station and increase the amount of the system.
Published in:	Proceedings of the 2008 National Technical Meeting of The Institute of Navigation January 28 - 30, 2008 The Catamaran Resort Hotel San Diego, CA
Pages:	382 - 388
Cite this article:	Sun, Guoliang, Shen, ShiTuan, "A Method to Enhance RDSS Based on Receiver Clock Error Modeling," Proceedings of the 2008 National Technical Meeting of The Institute of Navigation, San Diego, CA, January 2008, pp. 382-388.
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