Volume 37 Issue 2
Mar.  2017
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FENG Laiping, CUI Xianqiang, JIA Xiaolin, RUAN Rengui. Analysis of the changing regularity of 16-parameter GPS broadcast ephemeris improved parameters (in Chinese)[J]. Journal of Space Science, 2017, 37(2): 214-221. doi: 10.11728/cjss2017.02.214
Citation: FENG Laiping, CUI Xianqiang, JIA Xiaolin, RUAN Rengui. Analysis of the changing regularity of 16-parameter GPS broadcast ephemeris improved parameters (in Chinese)[J]. Journal of Space Science, 2017, 37(2): 214-221. doi: 10.11728/cjss2017.02.214

Analysis of the changing regularity of 16-parameter GPS broadcast ephemeris improved parameters (in Chinese)

doi: 10.11728/cjss2017.02.214
  • Received Date: 2015-12-07
  • Rev Recd Date: 2016-06-06
  • Publish Date: 2017-03-15
  • A new 18-parameter GPS broadcast ephemeris improved on the basis of 16-parameter GPS are introduced in the GPS interface control document issued in 2004. But the improved reasons have not been analyzed. In this paper, the fitting algorithm of 16-parameter GPS broadcast ephemeris is briefly introduced, the differences of the two kinds of GPS broadcast ephemeris parameters are compared, and the change regularity and properties of the improved parameters are analyzed. Calculation results show that the improved parameters of 16-parameter GPS broadcast ephemeris have obvious periodic variation characteristics with a period of about 12 hours and 13.5 days, and the newly proposed 18-parameter GPS broadcast ephemeris can better approach the real orbit of GPS satellites.

     

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