Journal of Geodesy and Geoinformation Science ›› 2018, Vol. 1 ›› Issue (1): 46-52.doi: 10.11947/j.JGGS.2018.0106

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A 16-parameter GEO Broadcast Ephemeris

Zhongkai ZHANG1,Lan DU1(),Li LIU2,Feng HE2,Yu LU1,Peiyuan ZHOU1   

  1. 1. Zhengzhou Institute of Surveying and Mapping, Zhengzhou 450001, China
    2. Beijing Global Information Application and Development Center, Beijing 100094, China
  • Received:2016-08-03 Accepted:2017-09-01 Online:2018-12-20 Published:2019-11-20
  • About author:Zhongkai ZHANG(1989—),male,postgraduate,majors in orbital dynamics and satellite navigation. E-mail:zzk.caesar@gmail.com

Abstract:

Currently, the broadcast ephemerides used in GEOs are same as those of the MEOs and IGSOs in the BeiDou navigation constellation. However, a trade-off strategy, i.e. an orbital inclination of 5° rotation, is needed in the fitting algorithm to solve the ephemeris parameters as well as the user satellite position computation for GEOs. Based on the standard broadcast ephemerides, the representations of both the orbit and its perturbation were revised according to the second class of nonsingular orbital elements. In this research, a 16-parameter broadcast ephemeris is presented specifically for GEOs,and user satellite position computation formulas were derived correspondingly. Fit simulations show that the root of mean squares (RMS) of user range error (URE) with two hour and three hour data sets are better than 0.05m and 0.1m, respectively.

Key words: GEO satellites; broadcast ephemeris parameters; nonsingular orbital elements; perturbation; user range error(URE)