摘要
极坐标格式算法(PFA)是一种典型的聚束SAR成像算法。本文从信号相位历程的角度阐述了PFA成像的基本原理,并基于对条带SAR和聚束SAR两种模式的比较,利用二者之间的内在联系,将条带SAR的原始数据进行分块处理并将分块数据等效成为聚束模式数据,然后用PFA对等效数据进行聚束成像。对外场数据的处理证实了理论分析的正确性和本文所提出方法的可行性。
Polar format algorithm(PFA) is a typical image formation algorithm used in spotlight SAR.This paper elaborates on the basic image formation theory of PFA. And based on the comparison of stripmap SAR and spotlight SAR, the paper divides the stripmap SAR raw data into segments and converts theminto equivalent spotlight data according to the inherent relation between the two SAR modes. Then theequivalent data are respectively processed through PFA to form the spotlight SAR image. The processingresults of live data verify the theoretical analysis and the method proposed by this paper.
出处
《雷达科学与技术》
2003年第4期228-231,236,共5页
Radar Science and Technology
