Determination of CHAMP orbit from onboard GPS double-difference phase data with dynamic method

Jinyun Guo*, Chein-way Hwang, Jianguo Hu, Jiancheng Li

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

In order to determine the CHAMP's orbit, the onboard GPS data of CHAMP, the GPS data of IGS tracking stations, EOP, SGO and time data are necessary. The GPS data should be pre-processed to correct the clock error, solve the ambiguity, detect the cycle slips, determine the satellite attitude, and calculate the antenna phase center offset and correction. Then the air-ground GPS double-difference phase observations are constructed. The CHAMP's orbit is really determined with the dynamic method. Comparing with the PSO from German GFZ, the precision (RMS) in the radial direction is 0.285 7 m. For the 1-day overlapping orbit, the RMS of radial orbit difference is 0.095 8 m. Comparing the orbit end-points, the mean difference of radial orbit is 0.066 6 m.

Original languageEnglish
Pages (from-to)213-217
Number of pages5
JournalGeomatics and Information Science of Wuhan University
Volume31
Issue number3
StatePublished - 5 Mar 2006

Keywords

  • CHAMP
  • Dynamic method
  • GPS double-difference phase data
  • Satellite orbit determination

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