南极数字高程模型研究进展

本文首先结合卫星测高技术的发展,回顾了20多年来南极数字高程模型(DEM)研究发展的历史,并重点介绍了为处理Radarsat南极测图计划(RAMP)SAR影像进行地面验证而制作的高精度RAMP/DEM的构建过程。然后,介绍了南极局部地区,尤其是我国利用地面实测数据及遥感数据在南极地区进行DEM研究的状况。最后,结合冰、云和陆地高程卫星(ICESat)的研究进展,对最新的南极DEM研究进行了展望。

PROGRESS ON THE ANTARCTIC DIGITAL ELEVATION MODEL

Firstly,this paper retrospects the history of the research on Antarctic Digital Elevation Model(DEM) with the development of Satellite Altimetry,such as Seasat,Geosat,ERS-1/2 etc.The development of RAMP(Radarsat Antarctic Mapping Project)/DEM is introduced in detail which includes the data compilation and selection,analysis of the resultant DEM.Secondly,Chinese research on Antarctic DEM based on remote sensing data and survey data is introduced.Finally,the prospect of Antarctic DEM is presented with the development of Ice Cloud and Land Elevation Satellite(ICESat) and Cryosat.Although ESA's ice mission Cryosat was lost due to an anomaly in the launch sequence on October 8 of 2005,it is believed that another new Cryosat will be designed in the near future,which will make great contributions to the research on Antarctic DEM.