P-RTK: A High Reliable OTF Positioning Package for Both Single and Dual Frequency Observations

Dingsheng Chen and Jin Shi

Abstract:	P-RTK, developed by GeoNav Systems, is high precision positioning software package based on carrier phase based the fly (OTF). It works both in real time and in post mission modes. With its superior OTF ambiguity search and cvcle slip handling techniques,P-RTK has tremendously enhanced the reliability for Ll only OTF ambiguity resolution. While it is widely regarded Ll only ambiguity resolution unreliable, P-RTK’s reliability on Ll only OTF is over 05% for norm231 behaviour receivers and nearly 100% in most conditions. P-RTK can be used with GeoNav Systems’ low cost and some other GPS receivers to achieve the same accuracy as with very costly dual frequency receivers over a baseline up to 15 km. Typically, P-RTK can achieve reliable centimetre OTF accuracy in less than 10 minutes. With dual frequency configuration, P-RTK can typically achieve centimetre level accuracy with only a few seconds of observations and instantaneously in a favorable condition, such as eight and many cases of seven satellites. In addition, P-RTK can process data in an automatic mode to obtain the reliable OTF results, so it releases user from complicated and tedious parameter settings which are often required by other existing GE’S positioning softivare. Besides default parameter settings, P- RTK also provides user controllable mode for experienced users with special data processing requirements to get optimal OTF results. The paper will further discuss the main features of P-RTK in details with emphasis on the concepts of reIiability and avi1ilabiIity. The statistics of results with field data in both real time and post mission modes will be also provided.
Published in:	Proceedings of the 9th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1996) September 17 - 20, 1996 Kansas City, MO
Pages:	195 - 200
Cite this article:	Chen, Dingsheng, Shi, Jin, "P-RTK: A High Reliable OTF Positioning Package for Both Single and Dual Frequency Observations," Proceedings of the 9th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1996), Kansas City, MO, September 1996, pp. 195-200.
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