Title :
New applications of nonlinear chirp scaling in SAR data processing
Author :
Wong, Frank H. ; Yeo, Tat Soon
Author_Institution :
Dept. of Electr. Eng., Nat. Univ. of Singapore, Singapore
fDate :
5/1/2001 12:00:00 AM
Abstract :
New applications of nonlinear chirp scaling (NLCS) have been found in processing monostatic and bistatic SAR data acquired in the strip-map mode. When the effects in impulse response broadenings due to quadratic range migration are negligible for short radar wavelengths, a time domain range cell migration correction (RCMC) can be applied. After the correction, the FM rates of targets confined in a range gate will differ from each other. A nonlinear chirp perturbation function can be applied to each range gate to equalize the targets´ FM rates before azimuth compression. This algorithm is analyzed in the paper and is supported by point target simulation experiments
Keywords :
geophysical techniques; radar imaging; remote sensing by radar; synthetic aperture radar; terrain mapping; FM rate; SAR; algorithm; azimuth compression; bistatic SAR; data processing; geophysical measurement technique; impulse response broadening; land surface; monostatic SAR; nonlinear chirp perturbation function; nonlinear chirp scaling; quadratic range migration; radar remote sensing; range gate; strip map mode; synthetic aperture radar; terrain mapping; time domain range cell migration correction; Algorithm design and analysis; Analytical models; Azimuth; Chirp; Data processing; Frequency domain analysis; Helium; Radar; Trajectory; Transmitters;
Journal_Title :
Geoscience and Remote Sensing, IEEE Transactions on
