Terrain elevations from InSAR incorporating ground control data

Interferometric SAR (InSAR) techniques permit the production of elevation maps of an area through interpretation of interference fringes between two SAR images of the same region. However, uncertainty in orbit determination causes an absolute height error of the order of several hundred meters. It i...

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Bibliographic Details
Published inIGARSS'97. 1997 IEEE International Geoscience and Remote Sensing Symposium Proceedings. Remote Sensing - A Scientific Vision for Sustainable Development Vol. 4; pp. 1576 - 1578 vol.4
Main Authors Mirbagheri, M., Trinder, J.C., Forster, B.C.
Format Conference Proceeding
LanguageEnglish
Published IEEE 1997
Subjects
Control systems
Error correction
Interference
Layout
Orbital calculations
Polynomials
Production
Synthetic aperture radar interferometry
Terrain mapping
Uncertainty
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Summary:Interferometric SAR (InSAR) techniques permit the production of elevation maps of an area through interpretation of interference fringes between two SAR images of the same region. However, uncertainty in orbit determination causes an absolute height error of the order of several hundred meters. It is a systematic error which affects every point in the image, but can be removed using known heights of a few control points in a given image scene. A model is developed to calculate absolute terrain elevation incorporating ground control points. The computation procedure is based on stereo radargrammetric mapping of overlapping SAR images, incorporating expressions for elevation based on the fringe information. The model uses second order polynomials for orbital position and first order polynomials for satellite velocity.
ISBN:9780780338364
0780338367
DOI:10.1109/IGARSS.1997.608955