Method and Accuracy Assessment of Zenith Tropospheric Delay Derived from ERA5 Re-Analysis Data
Abstract In this paper, we present the method of calculating zenith tropospheric delay (ZTD) from ERA5. Then the accuracy of the ZTD derived from ERA5 is evaluated using GNSS data during the entire year of 2017 with a comparison to ERA-Interim. The GNSS-derived ZTD is obtained at 26 stations in crustal movement observation network of China (CMONOC). Statistics show that the root mean square (RMS) of ZTD calculated by ERA5 is lower than ERA-Interim, indicating that the ERA5 has an obvious accuracy improvement over the ERA-Interim.
Key words :
GNSS
ERA5
ERA-Interim
zenith tropospheric delay
CMONOC
Cite this article:
ZHANG Yonglin,CAI Changsheng. Method and Accuracy Assessment of Zenith Tropospheric Delay Derived from ERA5 Re-Analysis Data[J]. jgg, 2020, 40(1): 62-65.
ZHANG Yonglin,CAI Changsheng. Method and Accuracy Assessment of Zenith Tropospheric Delay Derived from ERA5 Re-Analysis Data[J]. jgg, 2020, 40(1): 62-65.
URL:
http://www.jgg09.com/EN/ OR http://www.jgg09.com/EN/Y2020/V40/I1/62
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