Resolution improvement in both azimuthal and range directions with repeat-pass spaceborne SAR - art. no. 67460N

	Resolution improvement in both azimuthal and range directions with repeat-pass spaceborne SAR - art. no. 67460N
	Yunhua Zhang
	2007
会议名称	Conference on SAR Image Analysis, Modeling, and Techniques IX
会议日期	2007
会议地点	Florence, ITALY
关键词	spaceborne SAR repeat-pass resolution improvement high-resolution stepped frequency chirp signals (SFCSs) matched filtering doppler spectrum spatial spectrum combination
页码	N7460-N7460
通讯作者	北京8701信箱
英文摘要	This paper introduces a simple method to obtain a much higher resolution than the designed resolution in both azithumal and range directions for SAR by synthesizing the data taken by repeat passes without increasing any complexity in SAR hardware and satellite platform. The basic idea of the method is to firstly establish the equivalence between the signal models of repeat pass SAR signals in both azithumal and range directions and the signal model of stepped frequency chirp signals (SFCSs) when some conditions are presumed, i.e. for range direction, interferometric condition is required and for azimuthal direction, a small squint angle increase between repeat passes is required, and then using the already proposed method for SFCSs compression to process the data of repeat passes. In the course of processing, each observation in range direction or in azimuthal direction is treated as a subchirp in SFCSs. The major facts affecting the final resolution one could get are investigated and found. They are the relative range measurement accuracy and the absolute squint angle measurement accuracy between repeat passes. Detailed derivations and simulations are presented to show the effectiveness of the method.
收录类别	CPCI
会议网址	://000253486800015
会议录	Proceedings of the Society of Photo-Optical Instrumentation Engineers (Spie)
会议录出版者	Spie-Int Soc Optical Engineering
会议录出版地	BELLINGHAM
学科主题	微波遥感
语种	英语
ISSN号	0277-786X
ISBN号	978-0-8194-6904-5
内容类型	会议论文
源URL	[http://ir.cssar.ac.cn/handle/122/1785]
专题	国家空间科学中心_微波遥感部
推荐引用方式 GB/T 7714	Yunhua Zhang. Resolution improvement in both azimuthal and range directions with repeat-pass spaceborne SAR - art. no. 67460N[C]. 见:Conference on SAR Image Analysis, Modeling, and Techniques IX. Florence, ITALY. 2007.://000253486800015.