南极Amery冰架近海Envisat测高波形重构海面高评价  

Assessment of Waveform Retracked Envisat Altimetry Sea Surface Heights Near Antarctic Amery Ice Shelf Coastal Ocean

作　　者：赵健[1,2,3] 沈云中[1,3] 

机构地区：[1]同济大学测绘与地理信息学院,上海200092 [2]中国石油大学(华东)地球科学与技术学院,山东青岛266580 [3]同济大学空间信息科学及可持续发展应用中心,上海200092

出　　处：《山东科技大学学报（自然科学版）》2013年第3期71-76,共6页Journal of Shandong University of Science and Technology(Natural Science)

基　　金：国家重点基础研究发展计划("973"计划)项目(2012CB957700);国家自然科学基金项目(41074018;40874016)

摘　　要：波形重构能够有效改善近岸海域卫星测高数据精度。以南极Amery冰架附近海域为研究区域,采用OCOG,Threshold,β-5和Sea-ice波形重构算法对Envisat高度计4条轨迹的测高波形数据进行了计算分析,并对重构后的海面高精度进行评价。结果表明,Threshold和Sea-ice算法能显著提高重构后海面高的精度,其中Sea-ice算法的重构精度最高,Threshold算法的精度也较好,这两种算法的结果都比较稳定,均适合于南极区域近海的测高波形重构。Waveform retracking can effectively improve the accuracy of sea surface height （SSH） measurements of the satellite altimetry. The Offset Center of Gravity （OCOG）, Threshold, β-5 parameter and Sea-ice retracking algorithms were used to retrack the Envisat waveform data over Antarctic Amery Ice Shelf coastal ocean and then the accuracy of retracked SSHs was assessed by comparing the retracked SSHs with Earth Gravitational Model 2008 （EGM2008） geoid. The results show that the quality of the SSH measurements can be improved by Threshold and Seadce retracking algorithms, among which the accuracy of Sea-ice algorithm is the highest and the Threshold algorithm also performs better. In addition, both algorithms can have very stable results and they are more suitable for the Envisat waveform retracking over Antarctic coastal ocean.

关 键 词：卫星测高 波形重构 AMERY冰架 近岸海域 

分 类 号：P715[天文地球—海洋科学]