GNSS World of China

Volume 43 Issue 3
Jun.  2018
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LIU Shuangtong, WANG Mingxiao, YANG Shuwen, YANG Mingze, YANG Lihua. Fitting Accuracy Analysis of Satellite Coordinate Based on BDS Broadcast Ephemeris[J]. GNSS World of China, 2018, 43(3): 51-55. doi: 10.13442/j.gnss.1008-9268.2018.03.009
Citation: LIU Shuangtong, WANG Mingxiao, YANG Shuwen, YANG Mingze, YANG Lihua. Fitting Accuracy Analysis of Satellite Coordinate Based on BDS Broadcast Ephemeris[J]. GNSS World of China, 2018, 43(3): 51-55. doi: 10.13442/j.gnss.1008-9268.2018.03.009
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Fitting Accuracy Analysis of Satellite Coordinate Based on BDS Broadcast Ephemeris

doi: 10.13442/j.gnss.1008-9268.2018.03.009

  • Faculty of Geomatics, Lanzhou Jiaotong University, Gansu Province, Lanzhou 730070, China

  • Gansu Provincial Engineering Laboratory for National Geographic State Monitoring, Gansu Province, Lanzhou 730070, China

  • Post-Doctor Research Center of PLA 68029 Troops, Gansu Province, Lanzhou 730020, China

  • Lanzhou Precision Sand Table Model Intelligent Manufacturing Co., Ltd., Gansu Province, Lanzhou 730020, China

  • Publish Date: 2018-09-05
    Abstract
  • Aiming at the question of repeated calculations and low efficiency when calculating satellite positions using the broadcast ephemeris,this paper proposes the use of Chebyshev polynomials to fit satellite orbit for broadcast ephemeris by calculating the satellite coordinates of some fixed time intervals as known nodes. Using different fitting orders to find difference between the fitting point and the corresponding point obtained by the direct method and analyzing the fitting accuracy.The examples show that the broadcast ephemeris fitting accuracy can meet the requirements as long as the fitting time interval and the fitting order are taken properly.

     

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