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TitleEffects of relief on the selection of RADARSAT-1 incidence angle for geological applications
DownloadDownloads (Preprint)
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorSinghroy, V; Saint-Jean, R
SourceCanadian Journal of Remote Sensing vol. 25, issue 3, 1999 p. 211-217,
Alt SeriesEarth Sciences Sector, Contribution Series 20042794
PublisherInforma UK Limited
Mediapaper; on-line; digital
File formatpdf
Subjectsincident angles; optic angles; remote sensing; geological research; morphology; RADARSAT-1; ADRO 210
Illustrationssatellite images; graphs
Released2014 07 31
AbstractOur research presents some guidelines for the selection of the various RADARSAT-1 incidence angles for geological applications. The study areas were selected to represent different terrain types and surfaces both in Canada and around the world. The terrain types represented include: high relief, rugged, forested, mountainous environments (Hope, BC; China), moderate to high relief environments (Cape Breton Highlands, N.S.), moderate relief environments, glaciated, forested Precambrian Shield terrains (Geraldton, ON; Sudbury, ON; Whitecourt, AB), and low relief environments, partly vegetated, flat to rolling prairie landscapes (Morden, MN; Jordan). Our results show that the selection of the most useful RADARSAT-1 viewing geometry is application and site specific. Significant difference exists in the interpretability of geological structure, lithological units, landform and terrain types depending on the incidence angle chosen for image acquisition. In low relief environments, small incidence angles (10 to 25 degrees from vertical) will produce the maximum relief enhancement, but larger incidence angles (25 to 59 degrees) will also result in acceptable terrain rendition by increasing the terrain textural contrasts. In moderate relief environments, small to intermediate incidence angles (20 to 35 degrees) are suitable since they produce a good topographical enhancement. In high relief environments, intermediate to large incidence angles (35 to 59 degrees) are recommended to reduce geometric distortion and minimise shadow effects.

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