期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2006
卷号：XXXVI Part 1
出版社：Copernicus Publications
摘要：Satellite radar altimetry plays a critical role in monitoring the global oceans for scientific uses as well as navigation. The extreme accuracy of Jason-1 and Topex/Poseidon, and the additional global coverage of the European satellite Envisat, have created significant advances in geodetic, oceanic and climate studies. Altimeter calibration is essential to obtain an absolute measure of sea level, as are knowing the instrument's drifts and bias. Specially designed tide gauges are necessary to improve the quality of altimetric data, preferably near the satellite track. Further, due to systematic differences among instruments onboard different satellites, several in-situ calibrations are essentials to tie their systematic differences. We present synthesis of the results obtained from Topex/Poseidon and the first results on Jason-1 altimeter calibration using the measurements from a GPS Catamaran and the derived marine geoid. They agree relatively well with results obtained at Corsica, Harvest and Bass Strait calibration permanent sites. Moreover, the geodetic activities (e.g., GPS, levelling) has permitted to build a very accurate (few mm) local network linked to the European one, with a reference frame compatible with the satellite altimetry missions (ITRF2000). The GPS kinematic data were processed using two different softwares allowing to check the consistency of the solutions
