摘要
星载InSAR技术具有高效率、高精度获取全球DEM数据及其他增值产品的优势,是地形测绘领域的研究热点。本文综合利用国内外多源星载SAR影像数据,开展地形干涉测量试验及精度对比分析,旨在为全球测绘提供技术参考。现有的X/C/L波段卫星SAR系统,如COSMO-SkyMed、GF-3、ALOS-2获取的干涉数据集,在青海典型复杂地形实验区均成功获取了DEM数据产品。分析结果表明,在3种典型数据源中,基于COSMO-SkyMed干涉测量DEM的精度与细节质量相对较高,GF-3干涉结果次之,ALOS-2数据也实现了较好的地形测图精度。相关结果从侧面论证了国产GF-3数据具备在空间基线合适的条件下获得高精度DEM数据产品的潜力。
Spaceborne In SAR technology has been one of the hotspots in topographic surveying and mapping.Its advantages lie in that it can obtain global DEM data and other value-added products quickly and accurately.For providing a technical reference to the global mapping task,the multi-source spaceborne SAR image data are applied in implementing terrain interferometry experiment and accuracy analysis.The results indicated that the main SAR image data,including COSMO-SkyMed,GF-3 and ALOS-2 corresponding to the existing spaceborne X/C/L-bands SAR systems,could obtain high-quality DEM data products in the typical study area of Qinghai province.The accuracy and detail quality of DEM obtained by COSMO-SkyMed interferometry are higher relatively,followed by the GF-3 result,and the ALOS-2 result also has enough precision.The related results demonstrated from the side that,national GF-3 spaceborne SAR system has enough potential power in topographic interferometry,but the suitable spatial baseline is needed.
作者
陈利军
张瑞
郭旭东
洪凯瑞
涂晋升
CHEN Lijun;ZHANG Rui;GUO Xudong;HONG Kairui;TU Jinsheng(National Geomatics Center of China,Beijing 100830,China;Southwest Jiaotong University,Chengdu 611756,China)
出处
《测绘通报》
CSCD
北大核心
2020年第7期13-17,共5页
Bulletin of Surveying and Mapping
基金
全球地理信息资源建设与维护更新(12130040)
科技部国家重点研发计划(2016YBF0501401)
国防科技创新特区项目(18H86301ZT00502101)
四川省科技支撑计划应用基础面上项目(2018JY0664)。
