Terrain influences in SAR backscatter and attempts to their correction
- 1 May 1991
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Geoscience and Remote Sensing
- Vol. 29 (3), 451-462
- https://doi.org/10.1109/36.79436
Abstract
Synthetic aperture radar (SAR) images reveal radiometric image distortions that are caused by terrain undulations. The authors present the results of a study extracting and investigating the various components of these terrain influences. An imaging model, is set up for the geometric rectification of the SAR image and for a reconstruction of the imaging geometry. A prerequisite for the setup of this model is the use of a digital elevation model. Eight different geometric parameters are derived and investigated for their influence on grey-value variations in the geocoded SAR image. Image grey-value variations of three major land-use classes-forest, agricultural land, and urban/suburban areas-are examined. Empirical models of the SAR-backscatter variations are used to describe the relations between image grey values and various geometric parameters.<>Keywords
This publication has 9 references indexed in Scilit:
- Prototype Sar Geocoding Algorithms For Ers-1 And Sir-c /x-sar ImagesPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2005
- On shape from shadingComputer Vision, Graphics, and Image Processing, 1988
- Radiometric correction of C-band imagery for topographic effects in regions of moderate reliefIEEE Transactions on Geoscience and Remote Sensing, 1988
- A post-processing system for automated rectification and registration of spaceborne SAR imagery†International Journal of Remote Sensing, 1987
- Slope-Aspect Effects in Synthetic Aperture Radar ImageryCanadian Journal of Remote Sensing, 1985
- A simple speckle smoothing algorithm for synthetic aperture radar imagesIEEE Transactions on Systems, Man, and Cybernetics, 1983
- An examination of spectral band ratioing to reduce the topographic effect on remotely sensed dataInternational Journal of Remote Sensing, 1981
- Hill shading and the reflectance mapProceedings of the IEEE, 1981
- An Algorithm for Least-Squares Estimation of Nonlinear ParametersJournal of the Society for Industrial and Applied Mathematics, 1963