Volume 42 Issue 10
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WANG Huarun, CHAI Hongzhou, WANG Min, PAN Zongpeng. BDS Triple-frequency Ionospheric Delay and Code Hardware Delay Estimation Method[J]. Geomatics and Information Science of Wuhan University, 2017, 42(10): 1438-1445. DOI: 10.13203/j.whugis20150675
Citation: WANG Huarun, CHAI Hongzhou, WANG Min, PAN Zongpeng. BDS Triple-frequency Ionospheric Delay and Code Hardware Delay Estimation Method[J]. Geomatics and Information Science of Wuhan University, 2017, 42(10): 1438-1445. DOI: 10.13203/j.whugis20150675
shu

BDS Triple-frequency Ionospheric Delay and Code Hardware Delay Estimation Method

  • 1.

    Measurement Control Station of Taiyuan Satellite Launch Centre, Kelan 036301, China

  • 2.

    Institute of Geographic Space Information, Information Engineering University, Zhengzhou 450001, China

Funds: 

The National Natural Science Foundation of China 41574041

The National Natural Science Foundation of China 41604013

the Open Fund of Geographic Information Engineering State Key Laboratory SKLGIE2015-Z-1-1

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  • Author Bio:

    WANG Huarun, master, assistant engineer, specializes in GNSS measurement data processing, E-mail: 593855433@qq.com

  • Received Date: May 02, 2017
  • Published Date: October 04, 2017
    Graphical Abstract
    • Abstract
  • Getting precise undifferenced ambiguity resolution is the key issue when obtaining high-precise ionospheric delay with phase observations. Generally, extreme wide-lane (EWL), wide-lane (WL) and narrow-lane ambiguities are needed in the process under triple-frequency conditions. The MW combination wide-lane ambiguity may be fixed into a wrong integer because of the influence of code hardware delay and observation noise. In this paper BDS triple-frequency observation and GIM production are applied to resolve wide-lane ambiguity with a fixed EWL ambiguity and phase geometry-free (GF) combination. In addition, high-precise ionospheric delay is reconstructed and code hardware delay is separated. Test results show that the wide-lane ambiguity fixing success rate rises to 100% when assisted with GIM information, while the ambiguity is free of systemic bias. There is a difference of about 1.0m between the reconstructed ionospheric delay and GIM corrections, meaning an equivalent precision of 6 TECU. The standard deviation of the separated code hardware delay is less than 0.3 m.
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    • References (12)
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