DocumentCode :
667869
Title :
Frequency stability estimation of Compass On-board clock based on smoothed broadcast ephemeris
Author :
Hang Gong ; Wenke Yang ; Hai Sha ; Xiangwei Zhu ; Feixue Wang
Author_Institution :
Coll. of Electron. Sci. & Eng., Nat. Univ. of Defense Technol., Changsha, China
fYear :
2013
fDate :
21-25 July 2013
Firstpage :
289
Lastpage :
294
Abstract :
For Compass and Galileo systems which are currently in their stage of construction, it is difficult to obtain precise on-board clock short-term stability for common users. In this paper, a simple estimation method based on smoothed broadcast ephemerides is proposed, which only needs observation from one single receiver. The principle of this method is discussed, followed by performance evaluation using GPS data. We conclude that the relative error of short-term stability estimated with this method is less than 10% for average time of 1~800 seconds. Short-term stability estimation of all the current 14 Compass on-board clocks are presented, with the result of approximately 6×10-12 at average time of 1s and 2×10-13 at 1000s.
Keywords :
Global Positioning System; clocks; compasses; direct broadcasting by satellite; frequency measurement; frequency stability; radio receivers; GPS; compass and galileo systems; compass on-board clock; frequency stability estimation; performance evaluation; receiver; short term stability estimation error; smoothed broadcast ephemeris; time 1000 s; Clocks; Estimation; Global Positioning System; Receivers; Satellite broadcasting; Satellites; Stability analysis; BeiDou Navigation Satellite System (BDS/Compass); on-board clock; precise ephemeris; short-term stability estimation; smoothed broadcast ephemeris;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
European Frequency and Time Forum & International Frequency Control Symposium (EFTF/IFC), 2013 Joint
Conference_Location :
Prague
Type :
conf
DOI :
10.1109/EFTF-IFC.2013.6702233
Filename :
6702233
Link To Document :
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