Skip to main content
padlock icon - secure page this page is secure

Simplified radar mapping equations for terrain correction of space-borne SAR images

Buy Article:

$61.00 + tax (Refund Policy)

Correction of a space-borne Synthetic Aperture Radar (SAR) image for the effects of terrain distortion requires the use of mapping equations that relate the coordinates of a scatterer in three dimensions to its position in the twodimensional image. These mapping equations are complicated since they take into account the curved geometry of the Earth's surface, and since they must be evaluated of the order of 10 to 100 million times in the course of correcting a typical SAR image, the complexity is a disadvantage. In this paper we derive two approximations, one quadratic and one linear, to the mapping equation, and evaluate their performance relative to the observational parameters of a variety of space-borne SAR systems and the range of topographic variation present in the scene. We show that the quadratic approximation is sufficiently accurate in virtually all circumstances likely to be encountered. In most cases the linear approximation is also valid, although it is unsuitable where the topographic variation is large and the near-swath incidence angle is small.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
No Metrics

Document Type: Technical Note

Affiliations: Scott Polar Research Institute, University of Cambridge, Lensfield Road, Cambridge CB2 1ER, UK

Publication date: December 15, 2001

More about this publication?
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more