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TitleRadar Stereo Pairs for DEM Generation RADARSAT for Stereoscopy
DownloadDownloads (Preprint)
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorToutin, Th
SourceGeomatics Info Magazine International; 13, 1, 1999 p. 6-9, Open Access logo Open Access
Alt SeriesEarth Sciences Sector, Contribution Series 20042773
Mediapaper; on-line; digital
File formatpdf
Released1999 01 01
AbstractIn the 1960's, stereoscopic methods were first applied to radar images to derive ground elevation. Unfortunately, research uncovered contradictions and a dichotomy between error propagation theory and practical results, particularly over high relief areas. This dichotomy combined with the lack of stereo radar pairs led to the decline of radargrammetry. The launch in 1995 of Canada's first earth observation satellite, RADARSAT with its various operating modes and specific geometric characteristics has turned the tide. We are now able to understand and resolve this dichotomy, and to define general guidelines for selecting RADARSAT stereo pairs for DEM generation as a function of terrain relief. Digital Elevation Model (DEM) generation from stereo Synthetic Aperture Radar (SAR) images has once more become a hot R&D topic. However, stereoscopy using SAR data is more problematic than VIR stereoscopy, which emulates human stereo vision. An a priori understanding of the physical components of stereo SAR is a pre-requisite for any processing and product generation.

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