DOPPLER CENTER FREQUENCY CONVERSION METHOD OF A SATELLITE RADAR IMAGE TRANSFORMED EXACTLY TO MATCH THE DOPPLER CENTER FREQUENCIES OF A MAIN IMAGE AND A SUBSIDIARY IMAGE

摘要

PURPOSE: A Doppler center frequency conversion method of a satellite radar image improves the utilization of the satellite radar image and observes precise indicator displacement by using satellite radar interference.;CONSTITUTION: A first compensation satellite radar image is formed by Fourier-transforming a satellite radar image in the azimuth direction into a Doppler-distance domain (S10). A reference Doppler spectrum is formed from the first compensation satellite radar image (S20). A second compensation satellite radar image is formed by multiplying the reference Doppler spectrum and the first compensation satellite radar image (S30). A window, which is symmetric around a new Doppler center frequency, is formed (S40).;COPYRIGHT KIPO 2013;[Reference numerals] (AA) Start; (BB) End; (S10) Doppler frequency conversion step; (S20) Reference doppler spectrum creation step; (S21) Maximum value calculation; (S22) Average doppler spectrum creation; (S23) Noise removal; (S24) Normal doppler spectrum creation; (S25) Reference doppler spectrum creation; (S30) Doppler spectrum correction step; (S40) Windowing step; (S50) Doppler frequency re-conversion step