Orthorectification of radar (SAR) data: synergism and complementariness with optical (Landsat TM) data

Cora Lucia Braescu; Maria Zoran; Cristina Aiftimiei; Axente D. Stoica; Dan Raducanu

doi:10.1117/12.312683

2 July 1998 Orthorectification of radar (SAR) data: synergism and complementariness with optical (Landsat TM) data

Cora Lucia Braescu, Maria Zoran, Cristina Aiftimiei, Axente D. Stoica, Dan Raducanu

Proceedings Volume 3405, ROMOPTO '97: Fifth Conference on Optics; (1998) https://doi.org/10.1117/12.312683
Event: ROMOPTO '97: Fifth Conference on Optics, 1997, Bucharest, Romania

Abstract

The integration of digital remote sensing data from either airborne or spaceborne platforms and normal line or thematic maps has become increasingly significant to a varied field of applications, from geology to municipal mapping. To take full advantage of this data source, it must be overlayed to existing map data. The geometry and projection information must be equivalent, in other words they must be an orthogonal projection or correlation between the point on the ground and some reference surface. This process is referred to as rectification. The output satellite or airphoto images are referred to as orthorectified images or ortho images. The particular data we have used--SAR (Synthetic Aperture Radar) have several characteristics which we had to take into account in order to produce the orthorectified images. The main problem is the geometric distortion (layover, shadowing effects) due to the oblique viewing of the antenna. Another problem met was the `speckle' type perturbation, due to the coherence of the radar signal. An orthorectification procedure for radar data (SAR-ERS-1) over a mountainous zone in Romania (Buzau) is presented, also a registration procedure with optical (Landsat TM) data and a complementarity study.

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Cora Lucia Braescu, Maria Zoran, Cristina Aiftimiei, Axente D. Stoica, and Dan Raducanu "Orthorectification of radar (SAR) data: synergism and complementariness with optical (Landsat TM) data", Proc. SPIE 3405, ROMOPTO '97: Fifth Conference on Optics, (2 July 1998); https://doi.org/10.1117/12.312683

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KEYWORDS

Radar

Synthetic aperture radar

Earth observing sensors

Landsat

Image registration

Satellites

Integrated optics

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