Scientific Quarterly Journal of Geosciences

Scientific Quarterly Journal of Geosciences

Study of 2D and 3D Geometric Models Applied on SAR Images(A case study in BAM area)

Document Type : Original Research Paper

Authors
M. Dehghani
M. J. Valadan Zouj
A. Mansourian
Faculty of Geodesy & Geomatics Engineering, K. N. Toosi University of Technology (KNTU), Tehran, Iran.
10.22071/gsj.2008.58202
Abstract
study several 2D and 3D math models have been tested in order to correct slant range SAR data geometrically. Some of these models consider the imaging geometry at the time of imaging while the others relate the ground space to the image one by mathematical polynomials. The images used here are 3 ENVISAT ones of Bam area. In order to extract the 3D GCPs, a topographic map with a scale of 1:25000 and SRTM DEM were used. The 2D math models used in this study include Global polynomial, Point wise, Piece wise and Projective while the 3D models are DLT and Rigorous SAR model. Since the images used in this study were originally ordered for interferometry studies, their baseline is so small that the precision of 3D coordinates extraction is not satisfactory enough. However, the results of 2D models are much better.  
Keywords
RADAR
SAR images
Geometric correction
Control point
Radargrammetry
Crosetto, M. &  Argues Pereze F., 1999 -  Radargrammetry and SAR interferometry for DEM generation: validation and data fusion. Proceedings of a Conference held 26-29 October, Toulouse, France. European Space Agency, 2000. ESA-SP vol. 450, ISBN: 9290926414, p.367.
 
Liu, H., Zhao Z. &  Jezek, K. C., 2004 - Correction of positional errors and geometric distortions in topographic maps and DEMs using  rigorous SAR simulation technique, Photogrammetric Engineering & Remote Sensing , Vol. 70, No. 9, 1031-1042
Leberl, F. W., 1990 – Radargrammetric Image Processing. Artech House. 
Scientific Quarterly Journal of Geosciences
Volume 17, Issue 65
Winter 2007
Pages 183-195