Title :
Geo-location error correction for synthetic aperture radar image using the ground control point
Author :
Rho, Soo H. ; Kim, Jung ; Kwag, Young K.
Author_Institution :
ISR R&D Center, LIGNex1, Yongin, South Korea
Abstract :
Spaceborne synthetic aperture radar(SAR) can provide a high resolution image in all weather conditions. Spaceborne SAR(Synthetic Aperture Radar) obtains electronic image of earth´s surface using electromagnetic waves. SAR image inherently contains geo-location error which is caused by SAR image acquisition geometry, imaging mode, characteristics of reflectivity and image formation process. In this paper, a geo- location error correction method is presented to analyze and correct the geometric distortion by terrain height error. Using RADARSAT-1 image, a simulation is performed to evaluate the proposed geo-location algorithm. To analyze the effect of proposed correction method, the corrected SAR images are compared with the reference image by RMSE values.
Keywords :
geophysical image processing; radar imaging; remote sensing by radar; synthetic aperture radar; RADARSAT-1 image; SAR image acquisition geometry; SAR imaging mode; geolocation error correction; geometric distortion; ground control point; high resolution images; image formation process; reflectivity; spaceborne SAR image; synthetic aperture radar; terrain height error; Error correction; Geometry; Radar cross section; Radar imaging; Shadow mapping; Spaceborne radar; Foreshortening; Geo-location; Ground Control Point; Layover; SAR; Shadowing;
Conference_Titel :
Geoscience and Remote Sensing Symposium (IGARSS), 2011 IEEE International
Conference_Location :
Vancouver, BC
Print_ISBN :
978-1-4577-1003-2
DOI :
10.1109/IGARSS.2011.6050198
