GNSS World of China

Volume 47 Issue 5
Nov.  2022
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HE Bei, CAI Changsheng, PAN Lin, CAI Chenglin. Optimization design method for low earth orbit navigation constellation considering constellation stability and comprehensive cost[J]. GNSS World of China, 2022, 47(5): 9-15. doi: 10.12265/j.gnss.2022092
Citation: HE Bei, CAI Changsheng, PAN Lin, CAI Chenglin. Optimization design method for low earth orbit navigation constellation considering constellation stability and comprehensive cost[J]. GNSS World of China, 2022, 47(5): 9-15. doi: 10.12265/j.gnss.2022092
shu

Optimization design method for low earth orbit navigation constellation considering constellation stability and comprehensive cost

doi: 10.12265/j.gnss.2022092
  • 1.

    School of Geosciences and Info-Physics, Central South University, Changsha 410083, China

  • 2.

    School of Automation and Electronic Information, Xiangtan University, Xiangtan 411105, China

  • Received Date: 2022-05-25
  • Accepted Date: 2022-08-25
    • Available Online: 2022-09-26
    Abstract
  • The first step is to design a low earth orbit satellite (LEO) for navigation augmentation using low earth orbit satellites. When designing the constellation configuration, the stability and comprehensive cost of the constellation are two important factors to be considered. This paper presents an optimal design method for low earth orbit navigation constellation considering constellation stability and comprehensive cost. First, the Iridium constellation is optimized by genetic algorithm. Compared with Iridium constellation, the mean number of visible satellites increases from 2.3 to 2.9, the standard deviation of visible satellites decreases from 2.3 to 0.7, and the comprehensive cost factor decreases from 5.3 to 4.5, which proves the effectiveness of this method. Then, taking Walker constellation as the basic configuration, the low earth orbit hybrid constellation is optimized by genetic algorithm, considering the navigation performance and comprehensive cost on the basis of ensuring the stability of the hybrid constellation. The optimized low earth orbit hybrid constellation is combined with the BDS constellation. Compared with the BDS, the mean number of visible satellites increases from 6.9 to 9.3, and the standard deviation of visible satellites decreases from 1.1 to 0.4.

     

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