Automated rectification and geocoding of SAR imageryAn automated post-processing system has been developed for rectification and geocoding of SAR (Synthetic Aperture Radar) imagery. The system uses as input a raw uncorrected image from the operational SAR correlator, and produces as a standard output a rectified and geocoded product. The accurate geolocation of SAR image pixels is provided by a spatial transformation model which maps the slant range-azimuth SAR image pixels into their location on a prespecified map grid. This model predicts the geodetic location of each pixel by utilizing: the sensor platform position; a geoid model; the parameters of the data collection system and the processing parameters used in the SAR correlator. Based on their geodetic locations, the pixels are mapped by using the desired cartographic projection equations. This rectification and geocoding technique has been tested with Seasat and SIR-B images. The test results demonstrate absolute location uncertainty of less than 50 m and relative distortion (scale factor and skew) of less than 0.1 percent relative to local variations from the assumed geoid.
Document ID
19870065869
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Kwok, R. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Curlander, J. C. (California Institute of Technology Jet Propulsion Laboratory, Pasadena, United States)