计算测高卫星的正常点及其平均海面高  

Computation of normal points with their mean SSH of altimetry satellite

作　　者：彭富清[1] 夏哲仁[1] 张瑞华[1] 石磐[1] 

机构地区：[1]西安测绘研究所,西安710054

出　　处：《地球物理学进展》2004年第2期437-441,共5页Progress in Geophysics

基　　金：国家自然科学基金(40374001)项目资助.

摘　　要：　利用测高卫星的冻结轨道特征计算了正常点轨迹,利用三次B样条函数和Stacking技术内插计算了T/P、ERS-1/2和Geosat测高数据在正常点的平均海面高,改善了测高数据的精度和分辨率.最后,利用正常点上的平均海面高反演了多种分辨率的海域重力异常,其中所反演的海域重力异常的标准差为mGal级.The normal points of the altimetry satellite are computed according to the frozen orbit of the altimetry satellite. The cubic B\|sample functions and the Stacking technique are applied to determine the mean SSHs at the normal points from the altimeter data of T/P, ERS\|1/2 and Geosat satellite, which improves the accuracy and resolution of the altimeter data. Finally, multi\|resolution marine gravity anomalies are determined from the mean SSH, and the STD of the marine gravity anomalies is mGal. 

关 键 词：正常点 三次B样条函数 Stacking技术 海域重力异常 

分 类 号：P228[天文地球—大地测量学与测量工程]