Volume 39 Issue 5
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Article Navigation >  Chinese Journal of Space Science  > 2019  >  39(5): 662-669
MEI Dengkui, WEN Debao. Comparative Analysis of Two Precise Processing Methods for MGEX BDS Differential Code Biases[J]. Chinese Journal of Space Science, 2019, 39(5): 662-669. doi: 10.11728/cjss2019.05.662
Citation: MEI Dengkui, WEN Debao. Comparative Analysis of Two Precise Processing Methods for MGEX BDS Differential Code Biases[J]. Chinese Journal of Space Science, 2019, 39(5): 662-669. doi: 10.11728/cjss2019.05.662
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Comparative Analysis of Two Precise Processing Methods for MGEX BDS Differential Code Biases

doi: 10.11728/cjss2019.05.662

  • 1. School of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha 410114;

  • 2. School of Geographical Science, Guangzhou University, Guangzhou 510006

  • Received Date: 2018-12-03
  • Rev Recd Date: 2019-02-26
  • Publish Date: 2019-09-15
    Abstract
  • Differential Code Bias (DCB) is one of the systematic errors that must be dealt with in BDS-based high-precision positioning and ionospheric modeling. Firstly, two different processing strategies proposed by DLR and CAS for estimating BDS differential code biases are introduced respectively. Secondly, using the BDS differential code bias products released by MGEX in 2017 and June 2018, the variation characteristics of daily solutions, monthly mean values and the stability of BDS satellite DCB estimated by DLR and CAS, respectively, are compared and analyzed in this paper. The results show that both the DLR DCB and CAS DCB exhibited high stability in 2017, and the stability of C2I-C7I DCB was better than that of C2I-C6I DCB. Besides, the stability of monthly mean values of BDS satellite DCB was better than that of daily solutions. In June 2018, the stability of DLR DCB is slightly better than that of CAS DCB, and the difference between DLR DCB and CAS DCB ranged from -0.58ns to 1.07ns, indicating that the BDS satellite DCB estimated by CAS and DLR had a good consistency. BDS satellite DCB products provided by DLR and CAS have high reliability in correcting differential code biases for global BDS users.

     

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