GEOSCAN Search Results: Fastlink


TitleAnalytic Formulation of Spaceborne SAR Image Geocoding and Value-AddedProduct Generation Procedures Using Digital Elevation Data
AuthorGuindon, B; Adair, M
SourceCanadian Journal of Remote Sensing 18, 1, 1992 p. 2-12,
Alt SeriesEarth Sciences Sector, Contribution Series 20041064
Alt SeriesRESORS 1088502
PublisherInforma UK Limited
Mediapaper; on-line; digital
File formatpdf
Subjectsgeophysics; remote sensing
Released2014 08 01
AbstractBecause of the viewing geometry characteristics of spaceborne SARs carried by SEASAT, ERS-1, JERS-1, and RADARSAT, images from these sensors will exhibit significantly greater radiometric and geometric sensitivity to local topographic relief than corresponding optical images from Landsat and SPOT sensors. It is imperative, therefore, that digital elevation models be an integral part of any SAR analysis capability. This paper presents a unified analytic formulation of a simulation-based approach to spaceborne SAR analysis, including image geocoding and value-addedproduct generation to aid in subsequent scene interpretation. The concept of a topographic-scaling factor is proposed to quantify the average level of geometric distortion in a SAR scene given a knowledge of the elevation variability over a site. A prototype software package based on these algorithms has been implemented on a low-cost personal computer platform and used to geocode two example SEASAT SAR scenes that exhibit terrain-induced distortions on the scale of 1 km to 1.5 km. Final geocoding accuracies of 75 m to 150 m have been achieved using a 1:250 000-scale DEMs.

Date modified: