Volume 40 Issue 2
Mar.  2020
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YAO Xiang, CHEN Mingjian, WANG Jianguang, CHEN Rui. Adaptability Analysis of GPT2w Model in High Latitudes[J]. Chinese Journal of Space Science, 2020, 40(2): 242-249. doi: 10.11728/cjss2020.02.242
Citation: YAO Xiang, CHEN Mingjian, WANG Jianguang, CHEN Rui. Adaptability Analysis of GPT2w Model in High Latitudes[J]. Chinese Journal of Space Science, 2020, 40(2): 242-249. doi: 10.11728/cjss2020.02.242
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Adaptability Analysis of GPT2w Model in High Latitudes

doi: 10.11728/cjss2020.02.242 cstr: 32142.14.cjss2020.02.242

  • 1 63798 PLA Troops, Xichang 615000;

  • 2 Institute of Geography Spatial Information, Information Engineering University, Zhengzhou 450001

  • Received Date: 2018-12-07
  • Rev Recd Date: 2019-07-23
  • Publish Date: 2020-03-15
    Abstract
  • The GPT2w model is the most accurate zenith tropospheric model in current, but there exists large error at high latitudes. In order to better ensure the high-precision application of satellite navigation and positioning system in high latitudes, the accuracy of GPT2w model in high latitudes is evaluated, and GPT2w model is used to obtain zenith tropospheric wet delay, dry delay and total delay, and the impact of GPT2w model correction on precise point positioning is explored. The test results show that the accuracy of GPT2w model in high latitudes is in the centimeter level, which is better than that in the middle and low latitudes. The zenith tropospheric delay in the Antarctic and Arctic regions has obvious seasonal variation characteristics and regional consistency characteristics. The total tropospheric delay in summer is higher than that in winter. The tropospheric delay in the Arctic region is significantly higher than that in the Antarctic region, and the zenith tropospheric delay in the Arctic region varies with the seasons more than the Antarctic region. The PPP test results show that the GPT2w model can effectively improve the positioning accuracy and adapt to high-precision positioning in high latitudes.

     

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