几种卫星测高海洋重力场模型精度比较分析  

Comparing and analyzing the accuracy of several satellite altimetry marine gravity field models

作　　者：范雕 李姗姗[1] 孟书宇 单建晨 张金辉[1] 王傲明 邢志斌 FAN Diao;LI Shanshan;MENG Shuyu;SHAN Jianchen;ZHANG Jinhui;WANG Aoming;XING Zhibin(Institute of Geospatial Information,Strategic Support Force Infomation Engineering University,Zhengzhou 450001,China;32022 Troops,Wuhan 430074,China;Space Engineering University,Beijing 102206,China)

机构地区：[1]战略支援部队信息工程大学地理空间信息学院,河南郑州450001 [2]32022部队,湖北武汉430074 [3]航天工程大学,北京102206

出　　处：《海洋测绘》2021年第5期1-5,共5页Hydrographic Surveying and Charting

基　　金：国家自然科学基金(41574020,41774018,41504018,41674026,41674082);国家重点研发计划(2016YFB0501702)。

摘　　要：以中国南海部分海域作为试验区,依据测区船载重力测量结果分别对S&S V28.1、S&S V29.1、DTU15和DTU17卫星测高海洋重力场模型开展了精度评估与分析工作。首先利用EIGEN6C4超高阶位系数模型计算得到的参考重力异常,使用多项式拟合技术对船载重力异常进行了长波误差改正;然后借鉴3σ准则进一步控制船载重力测量结果质量;最后以RMS作为精度主要评价指标,完成了对4种海洋重力场模型精度评估。结果表明,4种海洋重力场模型检核精度整体相当,其中S&S V29.1检核精度略高于S&S V28.1,4种重力异常模型在试验海域精度大致在1.5~6 mGal之间。试验结论对于后续重力场模型应用具有一定参考价值。The accuracy of S&S V28.1,S&S V29.1,DTU15 and DTU17 satellite altimetry marine gravity field models are evaluated and analyzed based on the shipborne gravity measurement results in the South China Sea.Firstly, the reference gravity anomaly calculated by EIGEN6 C4 model was used to correct the longwave error of shipborne gravity anomaly by using polynomial fitting technology;then, the quality of shipborne gravity measurement results was further controlled by using 3σ criterion;finally, the accuracy evaluation of four marine gravity field models was completed with RMS as the main evaluation index.The results showed that the accuracy of S&S V28.1,S&S V29.1,DTU15 and DTU17 was the same as a whole.The accuracy of S&S V29.1 was slightly higher than that of S&S V28.1.The accuracy of the four gravity anomaly models in the test area was about 1.5 mGal~6 mGal.The experimental results have certain reference for the subsequent application of gravity field model.

关 键 词：卫星测高 船载重力 海洋重力场 EIGEN6C4 精度分析 

分 类 号：P738.2[天文地球—海洋地质]