长空间基线干涉对辅助的时序InSAR岛礁沉降监测  

Long spatial baseline interferometric pair⁃aided time⁃series InSAR monitoring of reefs

作　　者：童成功 靳国旺[1] 滕惠忠 余洋 熊新[1] TONG Chenggong;JIN Guowang;TENG Huizhong;YU Yang;XIONG Xin(School of Geospatial Information,Strategic Support Force Information Engineering University,Zhengzhou 450001,China;Naval Research Institute,Tianjin 300061,China)

机构地区：[1]战略支援部队信息工程大学地理空间信息学院,河南郑州450001 [2]海军研究院,天津300061

出　　处：《海洋测绘》2022年第3期61-65,共5页Hydrographic Surveying and Charting

基　　金：国家自然科学基金(41474010,61401509)。

摘　　要：针对岛礁沉降监测中DEM现势性差、数据不完整等因素造成干涉处理困难的问题,设计了一种利用长空间基线干涉对生成DEM辅助时序InSAR处理的岛礁沉降监测方案。该方案选取空间基线较长且干涉质量良好的干涉对提取相对完整、精确的岛礁区域DEM,并利用该DEM仿真时序干涉处理中所需的地形相位,从而获取差分干涉图,实现精确、稳健的岛礁沉降监测。利用2020年04~09月覆盖某岛礁的12景TanDEM-X影像进行了沉降监测试验,在利用长空间基线像对获取DEM的基础上,得到了试验区沉降速率和沉降量分布图,验证了本方案的可行性和有效性。Aiming at the problem of difficult interference processing caused by factors such as poor DEM current situation and incomplete data in reef subsidence monitoring,a subsidence monitoring scheme of reefs using long⁃space baseline interferometric pairs to generate DEM⁃assisted time series InSAR processing is designed in the work.The scheme selects interferometric pairs with long spatial baselines and good interference quality to extract relatively complete and accurate DEM of reefs,and obtain the differential interferogram through this DEM to simulate the terrain phase required in the timing interferometry process,so as to obtain accurate and robust monitoring results of reef subsidence.The subsidence monitoring experiment was carried out using 12 Tan DEM⁃X images covering an reef from April to September 2020.On the basis of obtaining DEM,the subsidence rate and subsidence amount distribution map in the test area was obtained,which verifies this feasibility and effectiveness of the program.

关 键 词：合成孔径雷达干涉测量 数字高程模型 小基线集 岛礁沉降 沉降监测 

分 类 号：P237[天文地球—摄影测量与遥感]