SAR Processing by a modified CSA based algorithm with a delicate azimuth matched filter ETF4ZDT

KOMPSAT-6 in constellation of KOMSAT-5 is foreseen to be operating in near future to be used for variety of SAR applications and monitoring of Earth environment. In order to pursue an efficient and reliable product delivery, a genuine processing software concept is devised in which the algorithm is based on the well known chirp scaling algorithm. The efficiency of the algorithm is made through incorporation of a delicate azimuth matched filter named as ETF4ZDT which means exact transfer function 4th order zero Doppler time. The base principle of it is from ETF4 which is adopting 4th order polynomials for range history tracking. A practical format of the enhanced azimuth matched filter is delivered by ETF4ZDT which performs highly accurate compression, focusing targets to their zero Doppler time at once and preserves phases of targets for their closest approach ranges simultaneously without requiring any additional phase compensation.