NDLI: DEM Generation Combining SAR Polarimetry and Shape-From-Shading Techniques

Content Provider	IEEE Xplore Digital Library
Author	Xi Chen Chao Wang Hong Zhang
Copyright Year	2004
Abstract	Estimation of the polarization orientation angle shifts induced by terrain azimuth slope variations is a recently developed application in radar polarimetry. In general, without any prior knowledge on the terrain, two polarimetric SAR (POLSAR) flight passes are required to derive terrain slopes in perpendicular directions for digital elevation model (DEM) generation. Moreover, we note that SAR intensity is a strong indicator of the range component of the terrain slopes. In this letter, we developed a method for DEM generation requiring only one POLSAR flight pass, by combining orientation angle estimation and a shape-from-shading technique. In particular, when limited POLSAR data are available, this POLSAR technique provides an alternative way for DEM generation. National Aeronautics and Space Administration Jet Propulsion Laboratory (NASA/JPL) AIRSAR L-band POLSAR data over Camp Roberts, California, is used to demonstrate the results of the method proposed in this letter, and a DEM derived from simultaneously measured C-band interferometric SAR from NASA/JPL topographic SAR instrument is selected as the comparative ground truth to validate the effectiveness of this single POLSAR method. Analyses and discussions are also included in this letter.
Sponsorship	IEEE Geoscience and Remote Sensing Society
Starting Page	28
Ending Page	32
Page Count	5
File Size	481598
File Format	PDF
ISSN	1545598X
Volume Number	6
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Polarization Geoscience Synthetic aperture radar Azimuth Radar polarimetry Shape Geophysical measurements Digital elevation models Laboratories NASA terrain slope Digital elevation model (DEM) polarimetric synthetic aperture radar (POLSAR) shape from shading
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Geotechnical Engineering and Engineering Geology

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