文献类型：会议论文

英文题名：Evaluation of airborne L-band multi-baseline pol-InSAR for dem extraction beneath forest canopy

作者：Li, W.M.[1] Chen, E.X.[2] Li, Z.Y.[2] Jiang, C.[1] Jia, Y.[1]

第一作者：Li, W.M.

机构：[1] School of Geographic and Biologic Information, Nanjing University of Posts and Telecommunications, No. 9 Wenyuan Road Yadong new city Nanjing, Jiangsu province, China; [2] Institute of Forest Resources Information Technique, Chinese Academy of Forestry, No. 1 Dongxiaofu Haidian district, Beijing, China

会议日期：May 7, 2018 - May 10, 2018

会议地点：Beijing, China

语种：英文

外文关键词：Extraction - Optical radar - Remote sensing - Surveying

年份：2018

摘要：DEM beneath forest canopy is difficult to extract with optical stereo pairs, insar and pol-InSAR techniques. Tomographic SAR (TomoSAR) based on different penetration and view angles could reflect vertical structure and ground structure. This paper aims at evaluating the possibility of TomoSAR for underlying DEM extraction. Airborne L-band repeat-pass Pol-InSAR collected in BioSAR 2008 campaign was applied to reconstruct the 3D structure of forest. And sum of kronecker product and algebraic synthesis algorithm were used to extract ground structure, and phase linking algorithm was applied to estimate ground phase. Then Goldstein cut-branch approach was used to unwrap the phases and then estimated underlying DEM. The average difference between the extracted underlying DEM and Lidar DEM is about 3.39 m in our test site. And the result indicates that it is possible for underlying DEM estimation with airborne L-band repeat-pass TomoSAR technique. ? Authors 2018. CC BY 4.0 License.