학술논문
Radiometric corrections and calibration of SAR images
Document Type
Conference
Source
IGARSS '98. Sensing and Managing the Environment. 1998 IEEE International Geoscience and Remote Sensing. Symposium Proceedings. (Cat. No.98CH36174) IGARSS '98: sensing and managing the environment Geoscience and Remote Sensing Symposium Proceedings, 1998. IGARSS '98. 1998 IEEE International. 2:1147-1149 vol.2 1998
Subject
Language
Abstract
Specific characteristics of SAR images are the result of the imaging radar technique, which produces radiometric and geometric distortions. The main radiometric distortions are due to the spreading loss effect, the non-uniform antenna pattern, possible gain changes, saturation and speckle noise. The main geometric distortions are projection in slant range, foreshortening, layover and shadowing. To remove or reduce the distortions arising from these effects the application of image preprocessing procedures is necessary. This paper presents the procedures for preprocessing ERS/SAR and Radarsat images in terms of the radiometric corrections and calibration. Procedures for estimating the input filtering parameters for speckle reduction are also presented.