极地研究2017，Vol.29Issue(2)：204-209,6.DOI:10.13679/j.jdyj.2017.2.204
联合GPS和SARAL卫星测高数据构建南极Dome A区域DEM
DIGITAL ELEVATION MODEL CONSTRUCTED BY GPS AND SARAL DATA OVER DOME A
摘要
Abstract
DEM of the Antarctic ice sheet plays an important role on the Antarctic environment change and the topographic study. GPS data and satellite altimetry data are two common data to construct DEM of the Ant-arctic ice sheet. Considering the accuracy of GPS measurement data and the spatial resolution of satellite altimetry, this paper obtains a new DEM over Dome A using SARAL and GPS data. SARAL satellite is a follow-on satellite of Envisat, which is jointly developed by Centre National d'Etudes Spatiales (CNES) and Indian Space Research Organization (ISRO). A new radar altimeter AltiKa with the Ka band was first used to reduce the influence of the ionosphere and to improve spatial resolution. The GPS data collected in 29th CHINARE Expedition over Dome A were used to evaluate the accuracy of the DEM using SARAL data. Then a new DEM used obtained by the combination of SARAL data and GPS data over Dome A. The results show that the height accuracy of the SARAL data is about 0.615 m. Moreover, it can reduce to 0.261 m after the combination between GPS data and SARAL data.关键词
SARAL/数字高程模型/精度评估/数据融合Key words
SARAL/digital elevation model (DEM)/accuracy evaluation/data fusion引用本文复制引用
杨全明,杨元德,王泽民,宋国云,刘艳霞..联合GPS和SARAL卫星测高数据构建南极Dome A区域DEM[J].极地研究,2017,29(2):204-209,6.基金项目
全球变化研究国家重大科学研究计划(973计划)(2013CBA01804)、国家自然基金(41476163,41106163)、南北极环境综合考察及资源潜力评估专项(CHINARE2016)、测绘地理信息公益性行业科研专项经费项目(201412009)资助 （973计划）
