HAN Songhui, GONG Yisong, LI Jianwen, MA Chaozhong, LI Xinna, GUO Shumei. Outliers Detection in BDS Satellite Clock Errors by Using ARMA Model and Corresponding Short-Term Prediction[J]. Geomatics and Information Science of Wuhan University, 2021, 46(2): 244-251. DOI: 10.13203/j.whugis20190232
Citation: HAN Songhui, GONG Yisong, LI Jianwen, MA Chaozhong, LI Xinna, GUO Shumei. Outliers Detection in BDS Satellite Clock Errors by Using ARMA Model and Corresponding Short-Term Prediction[J]. Geomatics and Information Science of Wuhan University, 2021, 46(2): 244-251. DOI: 10.13203/j.whugis20190232

Outliers Detection in BDS Satellite Clock Errors by Using ARMA Model and Corresponding Short-Term Prediction

Funds: 

The National Natural Science Foundation of China 41774038

The National Natural Science Foundation of China 41474009

Information Engineering University Double Important 

More Information
  • Author Bio:

    HAN Songhui, PhD, associate professor, specializes in processing of surveying and navigation data. E-mail: hansonghui@126.com

  • Received Date: September 19, 2019
  • Published Date: February 04, 2021
  • The on-board atomic clock will be affected by such factors as bad space conditions and aging equipment while it is working, so there are often outliers in the satellite clock error data, among which the additive outlier (AO) is a common class of outliers in the clock error sequence. Based on the autoregressive moving average (ARMA) model, this paper proposes an AO detection algorithm, which can not only accurately detect isolated AO, but also accurately detect pieces of AO, and overcome the overwhelming and masking phenomenon that often occurs in other algorithms. When the AO of the clock error sequence is successfully detected, the algorithm can obtain an accurate ARMA model, and then accurately predict satellite clock error. In order to analyze the outlier detection and prediction effect of this algorithm, BeiDou satellite clock error is used to verify it. The results show that the proposed algorithm can accurately detect the AO of the clock error sequence, and has good effects in the short-term prediction of satellite clock errors.
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