Affiliation:
1. Institute of Space Sciences Shandong University Weihai China
2. Key Laboratory of Marine Environmental Exploration Technology and Application Ministry of Natural Resources Guangzhou China
Abstract
AbstractThe entire global operation of the newly launched BDS global navigation satellite system (BDS‐3) was completed in July 2020. After that, a series of performance tests were conducted, such as positioning, navigation, and signal experiments. However, the precipitable water vapor (PWV) retrieval performance evaluation of BDS‐3 has not yet been carried out, so in this paper, we thoroughly verified its accuracy with AIRS v7, ERA5, and radiosonde data to know the current performance of BDS‐3 PWV. From the tests applied with different satellite systems, we found that BDS‐3 has a comparable PWV retrieval performance as global positioning system (GPS), and a better outcome was achieved using the combined data from GPS and BDS‐3. Furthermore, BDS‐3 PWV accuracy calibrated by AIRS v7 showed a strong correlation with the spatial distribution. In addition, the PWV content decreased with the climbing of the latitude and elevation, and the relative root mean square error (ReRMSE) indicated better in the low‐latitude areas. Finally, the effect of different surface types on PWV performance was analyzed, showing the BDS‐3 PWV accuracy in the land type was the highest, the sea one was the lowest, and the coast type was in the middle. These findings will provide a good reference for the community to understand the PWV performance of BDS‐3 at the present stage.
Funder
National Natural Science Foundation of China
National Key Research and Development Program of China
Natural Science Foundation of Shandong Province
Publisher
American Geophysical Union (AGU)
Subject
General Earth and Planetary Sciences,Environmental Science (miscellaneous)
Cited by
2 articles.
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