Analysis of Positioning Accuracy for COMPASS Based on Single/Multi Frequency Pseudo-Range
Compass/Beidou satellite navigation system makes it possible for positioning using three frequencies for the first time. Single frequency pseudo-range measurement and multi-frequency combination pseudo-range measurement are introduced; single & dual f
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Analysis of Positioning Accuracy for COMPASS Based on Single/Multi Frequency Pseudo-Range Yongxing Zhu, Xiaolin Jia and Yu Liang
Abstract Compass/Beidou satellite navigation system makes it possible for positioning using three frequencies for the first time. Single frequency pseudo-range measurement and multi-frequency combination pseudo-range measurement are introduced; single & dual frequency positioning accuracy of raw & smooth pseudorange are analyzed; and the single point availability for different accuracy demands at Lintong station is counted. Results show that: the noise of the ionosphere free using triple-frequency combination is amplified as much as the one using dual frequency combination by eliminating only the first order ionosphere delay; and the amplification is 30 times by eliminating both the first and second order ionosphere delay; pseudo-range positioning errors less than 10 m takes up about 95 % for single & dual frequency pseudo-range; and the single point availability for 10, 15 and 20 m (both level and height errors) take up about 95, 99 and 100 % at the this station.
Keywords Beidou satellite navigation system Multi-frequency combination pseudo-range measurement Smooth pseudo-range positioning Positioning accuracy Availability
36.1 Introduction Compass is a self-developed, independent satellite navigation system which is being implemented and independently run by China [1]. Its goal is providing positioning, navigation and timing (PNT) service, as well as short-message communication service, for most Asia–Pacific region users in 2012, and realizing global coverage around 2020.1 After completion, it will provide users integrated 1
http://www.beidou.gov.
Y. Zhu (&) X. Jia Y. Liang Xi’an Research Institute of Surveying and Mapping, Xi’an, People’s Republic of China e-mail: [email protected]
J. Sun et al. (eds.), China Satellite Navigation Conference (CSNC) 2013 Proceedings, Lecture Notes in Electrical Engineering 243, DOI: 10.1007/978-3-642-37398-5_36, Ó Springer-Verlag Berlin Heidelberg 2013
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services of PNT and short-message. The capacity of compatibility and interoperability enables it to take advantage of multi-system observation data, which will greatly improve observation redundant degree as well as navigation and positioning accuracy [2]. Now the service performance has become a great concern for system builders, related scholars and many future users. In the early stage of the system construction, many researches has presented on the service performance of Compass based on simulation data. For example, Yang Xinchun analyzed the system’s satellite visibility, DOP values and positioning accuracy in China mainland based on the Compass global constellation. And the XPL value provided in China mainland is studied using the Space-Based Augmentation System’s (SBAS) integrity algorithm. Results show that the simulation meets the predetermined demand [3]. In the process of system-building, a number of studies are carried out based on measured da
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