Beyond the 12m TanDEM-X DEM

Author

Xiao Xiang Zhu ; Lachaise, Marie ; Adam, Fathalrahman ; Yilei Shi ; Eineder, Michael ; Bamler, Richard

Author_Institution

Remote Sensing Technol. Inst. (IMF), German Aerosp. Center (DLR), Oberpfaffenhofen, Germany

fYear

2014

fDate

13-18 July 2014

Firstpage

390

Lastpage

393

Abstract

The standard TanDEM-X product meats HRTI-3 DEM specification and comes with a sample spacing of 12 m. We apply non-local means (NL) interferogram filtering to the TanDEM-X data. In this paper, we present modifications of the original NL filter which render it more appropriate and efficient for massive processing of TanDEM-X data. Further, we investigate the noise reduction properties as well as the resolution and the coherence estimation accuracy of the new NL filter. Simulations and tests with TanDEM-X data hint that the improved DEMs possess a quality close to the HRTI-4 standard. Also future global InSAR missions like Tandem-L will greatly benefit from this type of filters.

Keywords

digital elevation models; noise; radar interferometry; synthetic aperture radar; 12M TanDEM-X DEM; HRTI-3 DEM specification; HRTI-4 standard; NL interferogram filtering; TanDEM-X data; TanDEM-X data simulation; TanDEM-X data test; Tandem-L; coherence estimation accuracy; filter type; future global InSAR mission; improved DEM; massive TanDEM-X data processing; noise reduction property; nonlocal mean interferogram filtering; original NL filter modification; resolution estimation accuracy; sample spacing; standard TanDEM-X product; Accuracy; Adaptive filters; Coherence; Noise measurement; Noise reduction; Optical filters; Standards; DEM; HRTI-4; TanDEM-X; nonlocal means filter;

fLanguage

English

Publisher

ieee

Conference_Titel

Geoscience and Remote Sensing Symposium (IGARSS), 2014 IEEE International

Conference_Location

Quebec City, QC

Type

conf

DOI

10.1109/IGARSS.2014.6946440

Filename

6946440