| 摘要 |
PURPOSE:To attain reproduction high in picture quality by making one- dimensional sampling of reproduced complex image in azimuthal direction, correcting phase deviation in range direction multiplying a phase rotation factor and making one-dimensional resampling in range direction. CONSTITUTION:A synthetic aperture radar SAR provided with a radar sensor 1 and an antenna 2 is mounted on an artificial satellite etc., and photographs ground surface while moving on the flying path 3 in the direction of arrow mark 4. Photographing data from the radar SAR are received by a ground station 6. In such a case, phase deviation in azimuthal direction is corrected by multiplying complex image after azimuth compression by phase rotation factor exp(-2pijBt). Then, one-dimensional resampling is made in azimuthal direction. Image data resampled in azimuthal direction is multiplied by phase rotation factor exp(2pijBt) again, and phase deviation in range direction is corrected. Finally, one-dimensional resampling is made in range direction to complete two-dimensional resampling process, and a reproduced image is obtained. |
