Potential and limits of non-local means InSAR filtering for TanDEM-X high-resolution DEM generation

REMOTE SENSING OF ENVIRONMENT

卷:218

Article

Zhu, Xiao Xiang^1,2  Baier, Gerald¹  Lachaise, Marie¹  Shi, Yilei³  Adam, Fathalrahman¹  Bamler, Richard^1,3 

[1] German Aerosp Ctr DLR, Remote Sensing Technol Inst IMF, D-82234 Oberpfaffenhofen, Wessling, Germany

[2] Tech Univ Munich, Signal Proc Earth Observat SiPEO, Arcisstr 21, D-80333 Munich, Germany

[3] Tech Univ Munich, Chair Remote Sensing Technol, Arcisstr 21, D-80333 Munich, Germany

关键词: TanDEM-X;    Non-local filtering;    Interferometric SAR;    Phase noise;    Digital elevation models;   

DOI  :  10.1016/j.rse.2018.09.012

来源: Elsevier

【 摘 要 】

The primary objective of the German TanDEM-X mission is the generation of a globally available, highly accurate and detailed digital elevation model (DEM), with the final product having 12 m posting, 2 m relative and 10 m absolute vertical accuracy. The first version of this global DEM has been finalized by the German Aerospace Center (DLR), in September 2016. Our experience with the experimental application of non-local means filters to TanDEM-X data suggests that TanDEM-X has the potential of producing DEMs of even higher resolution and accuracy. The goal of this investigation is to explore the possibility of employing non-local InSAR filters to achieve an effective resolution of 6 m, with an equivalent posting, and a relative height error below 0.8 m, i.e. an increase of quality by a factor of 2 x 2 in resolution and a factor of 2 m/0.8 m = 2.5 in height accuracy - all in all one order of magnitude.

【 授权许可】

Free