Performance evaluation of HY-2 series satellites in marine gravity field recovery  

作　　者：Ruijie Hao Xiaoyun Wan Keyan Zhang 

机构地区：[1]School of Land Science and Technology,China University of Geosciences(Beijing),Beijing,100083,China [2]School of Geospatial Engineering and Science,Sun Yat-Sen University,Zhuhai,519082,China

出　　处：《Geodesy and Geodynamics》2024年第4期397-403,共7页大地测量与地球动力学（英文版）

基　　金：funded by the National Natural Science Foundation of China(No.42074017).

摘　　要：China has successfully launched four Haiyang-2(HY-2)series altimetry satellites.HY-2A has attracted significant attention in gravity field recovery,but the performance of other HY-2 series satellites,including HY-2B/C/D,is seldom discussed.This study evaluated the performance of all the HY-2 series satellites in recovering marine gravity field.First,the crossover discrepancies in sea surface height of the four satellites,HY-2A,HY-2B,HY-2C,and HY-2D,were analyzed to assess their altimetry stability.It was found that HY-2B had the best altimetry quality,followed by HY-2D.Subsequently,different combina-tions of altimetry data were used to calculate vertical deflections and gravity anomalies in the South China Sea(112°E-119°E,12°N-20°N).The results showed that combining data from HY-2B,HY-2C,and HY-2D improved the inversion accuracy of gravity anomalies by 0.3 mGal compared to using HY-2A data alone.HY-2C and HY-2D contributed to enhancing the accuracy of the east component of vertical deflections.

关 键 词：Satellite altimetry HY-2 Sea surfaceheight Marinegravityfield 

分 类 号：P715.6[天文地球—海洋科学]