CAJ | 학술논문

升降轨PSInSAR时序分析获得的同一地区2组监测结果分别为升轨和降轨下的地表形变速率与累积变形量。针对研究区地面以下沉为主,水平方向变形极为微小的特点,将视线向( line of sight,LOS)变形转换为垂向的下沉值,以此进行升降轨模式下2组观测值的比较与精度检验。在此基础上,将相干目标的2组观测序列数据融合以实现加密观测。研究结果表明：升降轨模式下沉降速率观测值的互检验精度优于2 mm；2组观测序列数据的融合结果进一步揭示了相干目标在时域上的非线性沉降特征。
승강궤PSInSAR시서분석획득적동일지구2조감측결과분별위승궤화강궤하적지표형변속솔여루적변형량。침대연구구지면이하침위주,수평방향변형겁위미소적특점,장시선향( line of sight,LOS)변형전환위수향적하침치,이차진행승강궤모식하2조관측치적비교여정도검험。재차기출상,장상간목표적2조관측서렬수거융합이실현가밀관측。연구결과표명：승강궤모식하침강속솔관측치적호검험정도우우2 mm；2조관측서렬수거적융합결과진일보게시료상간목표재시역상적비선성침강특정。
A joint analysis of ascending and descending tracks of PSInSAR provides deformation measurements with average velocity and time series of each coherent target for the same deformation zone, which allows the inter -comparison of the velocity map and the fusion of deformation time series. In this paper, the authors present the method of PSInSAR measurement inter -comparison and time series fusion by using ascending and descending ENVISAT data acquired from 2006 to 2010 for the purpose of subsidence monitoring. The inter -comparison of subsidence velocity in ascending and descending tracks demonstrates that the precision is higher than 2 mm, indicating the accuracy of single track PSInSAR measurement for land subsidence monitoring. The fusion of ascending and descending deformation series of each coherent target enables a detailed analysis of temporal behaviors because it provides dense observations in time.