Assessment and Verification of Code-carrier Coherence on BDS

doi:10.16182/j.issn1004731x.joss.201810042

Abstract

Abstract: In order to verify code-carrier coherence on BeiDou Navigation Satellite System (BDS), the monitoring and assessment system of code-carrier coherence on BDS is designed. Code-Carrier Divergence (CCD) monitor is designed to detect the anomaly status of ionosphere, and based on the detection results, ionosphere delay error is eliminated by using Divergence-Free Smoothing (DFree) or Ionosphere-Free Smoothing (IFree) separately. The values of integer ambiguity are calculated based on tri-frequency ambiguity decomposition model, and the cycle slip is detected by using tri-frequency pseudorange code and combination of carrier phase. Assessment and verification of code-carrier coherence can be conducted. It is proved by experimental results data that the deviations of code-carrier coherence on different frequencies are fluctuating within a little range for most BDS satellites and the range is less than 6.1 m.

Key words: code-carrier coherence, Code-carrier Divergence (CCD) Monitor, Divergence-Free Smoothing (DFree), Ionosphere-Free Smoothing (IFree)

CLC Number:

TN967.1

Li Dongxia, Song Fuhan, Liu Ruihua. Assessment and Verification of Code-carrier Coherence on BDS[J]. Journal of System Simulation, 2018, 30(10): 3949-3957.

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