摘要
基于CryoSat-2 SARIn模式L1b数据,利用干涉处理法生成了南极Grove山地区DEM(CS2-SWDEM),并与CryoSat-2 L2高程脚点数据及4种南极DEM进行比较分析。针对CryoSat-2基线C数据存在的卫星姿态问题进行了侧滚角校正,此外,利用模型模拟了Grove山地区CryoSat-2雷达穿透影响。结果表明,CS2-SW DEM与REMA和TanDEM-X DEM符合较好,高程差异分别为-3.57±4.71 m和-0.28±4.68 m,其中和REMA的高程偏差主要由雷达穿透引起。同时,CS2-SW DEM精度随着坡度的增加而降低。
Based on the CryoSat-2 L1 b SARIn mode data,we generate DEM by interferometric swath processing method(CS2-SW DEM)in Grove Mountains,East Antarctica.The CS2-SW DEM is then compared with CryoSat-2 L2 elevation points products and four Antarctic DEMs.The roll angle correction is performed for the CryoSat-2 baseline C data with respect to the satellite attitude error.In addition,a microwave penetration model is used to evaluate the impact of the CryoSat-2 radar penetration in the Grove Mountains area.The results show that the CS2-SW DEM is in good agreement with TanDEM-X DEM and REMA,and the mean elevation differences are-3.57±4.71 m and-0.28±4.68 m respectively.The difference between CS2-SW DEM and REMA is mainly attributed by radar penetration.The error analysis suggests that CS2-SW DEM precision decreases with increasing slope.
作者
周春霞
付正
墙强
ZHOU Chunxia;FU Zheng;QIANG Qiang(Chinese Antarctic Center of Surveying and Mapping,Wuhan University,Wuhan 430079,China)
出处
《测绘地理信息》
2020年第1期1-7,共7页
Journal of Geomatics
基金
国家自然科学基金(41776200,41376187).
