Acta Geodaetica et Cartographica Sinica ›› 2016, Vol. 45 ›› Issue (3): 274-281.doi: 10.11947/j.AGCS.2016.20150386

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Analysis of Characteristics of QZSS Satellite Orbit and Clock Products during Yaw Attitude Model Switching

ZHOU Peiyuan, DU Lan, FANG Shanchuan, LU Yu, ZHANG Zhongkai, LI Fupeng   

  1. School of Navigation and Aerospace Engineering, Information Engineering University, Zhengzhou 450001, China
  • Received:2015-07-21 Revised:2015-11-03 Online:2016-03-20 Published:2016-03-25
  • Supported by:
    The National Natural Science Foundation of China(Nos.41174025;41174026;41174027)

Abstract: Yaw attitude model switching of navigation satellites have great impact on its orbit and clock products derived from precise orbit determination. Firstly, the yaw attitude and solar radiation model of QZSS is given briefly. Then, using QZSS precise orbit and clock products provided by IGS MGEX analysis center, precision of orbit and clock is analyzed by satellite laser ranging residuals and polynomial fit residuals respectively. Finally, spectral analysis and modified Allan variance is carried out on clock products to reveal its periodic variations. Research on QZSS satellite orbit and clock products of 2014 shows that there are two eclipse seasons of 20 days and the beta angle is fluctuating with a period of half-year. And there is significant correlation between the precision of orbit and clock products and beta angle. Moreover, the satellite clock offset has periodic variations similar to orbit periods and its amplitude is changing with the beta angle which indicates problems of current orbit determination strategies. In view of similarities between QZSS and BeiDou IGSO and MEO satellites in yaw attitude model, the conclusion is beneficial to improve BeiDou precise orbit determination.

Key words: quasi-zenith satellite system(QZSS), yaw attitude error, precise orbit determination, eclipse seasons, satellite laser ranging(SLR)

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