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Computation of normal points with their mean SSH of altimetry satellite

PENG Fu-qing,XIA Zhe-ren,ZHANG Rui-hua,SHI Pan(Xi'an research institute of surveying and mapping, Xi′an 710054, China)  
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. 
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