国产卫星时序InSAR形变监测精度分析  

Analysis of InSAR time-series deformation monitoring accuracy of domestic satellite

作　　者：许兵[1] 朱焱 李志伟[1] 易辉伟[1] 胡妙文 陈琦[2,3] 韩焜 杜洵 XU Bing;ZHU Yan;LI Zhiwei;YI Huiwei;HU Miaowen;CHEN Qi;HAN Kun;DU Xun(School of Geoscience and Info-Physics,Central South University,Changsha 410083,China;China Centre for Resources Satellite Data and Application,Beijing 100094,China;China Siwei Surveying and Mapping Technology Co.,Ltd.,Beijing 100089,China)

机构地区：[1]中南大学地球科学与信息物理学院,湖南长沙410083 [2]中国资源卫星应用中心,北京100094 [3]中国四维测绘技术有限公司,北京100089

出　　处：《测绘学报》2024年第10期1930-1941,共12页Acta Geodaetica et Cartographica Sinica

基　　金：国家杰出青年科学基金(41925016);国家自然科学基金(42330112);湖南省自然科学基金(2022JJ30707)。

摘　　要：陆地探测一号01组卫星(LT-1)的发射成功实现了我国L波段干涉SAR卫星“从无到有”的发展。LT-1卫星因空间避障等原因,部分空间基线较长;经过调轨后,空间基线长度控制在400 m以内。为了验证LT-1卫星数据的可用性及精度,本文以山西大同矿区为例,获取了2022年12月23日至2023年5月20日共25景LT-1条带模式影像数据,分别进行差分干涉测量短基线集时序分析(SBAS)技术和永久散射体(PS)技术数据处理。对时序InSAR和GPS站点在SAR卫星视线向上的形变监测结果进行对比分析,二者差异标准差分别为5.7 mm/a(SBAS-InSAR)和3.4 mm/a(PS-InSAR),时间序列均方根误差均小于5 mm,具有高度一致性。研究表明国产LT-1卫星具备高精度的形变监测能力,为国内地形测绘及形变监测提供了可靠的数据保障。The successful launch of the Lutan-1 satellite group(LT-1)has achieved the development of China s L-band interferometric SAR satellite from scratch.For obstacle avoidance,a small part of the spatial baselines of LT-1 satellite was long,but the length of the baseline has been controlled to within 400 meters after the orbit adjustment.In order to verify the availability and accuracy of LT-1 satellite data,this article takes the Datong mining area in Shanxi Province as an example and obtains 25 LT-1 strip pattern image data from December 23,2022 to May 20,2023,respectively,for SBAS-InSAR and PS-InSAR data processing.By comparing and analyzing the deformation monitoring results of time-series InSAR and GPS stations in the light of sight,the standard deviations of the two are 5.7 mm/a(SBAS-InSAR)and 3.4 mm/a(PS-InSAR),respectively.The root mean square error of the time series is less than 5 mm,indicating high consistency.The research has shown that domestically produced LT-1 satellites have high-precision deformation monitoring capabilities,providing reliable data assurance for domestic terrain surveying and deformation monitoring.

关 键 词：陆探一号 时序InSAR CSU-InSAR 精度分析 

分 类 号：P236[天文地球—摄影测量与遥感]