Extended wavenumber-domain synthetic aperture radar focusing with integrated motion compensation

Reigber, A; Alivizatos, E; Potsis, A; Moreira, A

dc.contributor.author	Reigber, A	en
dc.contributor.author	Alivizatos, E	en
dc.contributor.author	Potsis, A	en
dc.contributor.author	Moreira, A	en
dc.date.accessioned	2014-03-01T11:44:42Z
dc.date.available	2014-03-01T11:44:42Z
dc.date.issued	2006	en
dc.identifier.issn	1350-2395	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/37102
dc.subject	Data Collection	en
dc.subject	Data Processing	en
dc.subject	Motion Compensated	en
dc.subject	Spatial Resolution	en
dc.subject	Synthetic Aperture Radar	en
dc.subject	Low Frequency	en
dc.subject.classification	Telecommunications	en
dc.subject.other	Algorithms	en
dc.subject.other	Bandwidth	en
dc.subject.other	Data processing	en
dc.subject.other	Interferometry	en
dc.subject.other	Motion compensation	en
dc.subject.other	Sensors	en
dc.subject.other	Trajectories	en
dc.subject.other	Azimuth integration	en
dc.subject.other	Sensor parameters	en
dc.subject.other	Sensor trajectory	en
dc.subject.other	Spatial resolution	en
dc.subject.other	Wavelength resolution	en
dc.subject.other	Synthetic aperture radar	en
dc.title	Extended wavenumber-domain synthetic aperture radar focusing with integrated motion compensation	en
heal.type	other	en
heal.identifier.primary	10.1049/ip-rsn:20045087	en
heal.identifier.secondary	http://dx.doi.org/10.1049/ip-rsn:20045087	en
heal.language	English	en
heal.publicationDate	2006	en
heal.abstract	Modern synthetic aperture radar (SAR) systems are continually developing in the direction of higher spatial resolution. This requires the usage of high range bandwidths combined with long azimuth integration intervals. High-quality SAR processing methods, which are able to deal with such sensor parameters, are necessary for focusing the raw data of such sensors. Wavenumber-domain (ω-k) processing is commonly accepted as the ideal solution to the SAR focusing problem. However, it is only applicable to spaceborne SAR data where a straight sensor trajectory is given. In the case of airborne data, wavenumber-domain processing is limited because of its inability to perform high-precision motion compensation. Here, the extended chirp scaling (ECS) algorithm has proven to be very powerful, although it has certain limitations concerning long aperture syntheses and highly squinted geometries. In the paper, a new stripmap SAR data-processing algorithm, called extended ω-k (EOK), is analytically derived. The EOK algorithm aims to combine the high focusing accuracy of the wavenumber-domain algorithm with the high-precision motion compensation of the ECS algorithm. The new EOK algorithm integrates a three-step motion compensation correction in the general formulation of the wavenumber-domain algorithm, leading to a new airborne SAR processing scheme, which is also very robust in the cases of long synthetic apertures and high squint angles. As demonstrated, it offers the possibility of processing wide-band, low-frequency airborne SAR data up to near-wavelength resolution. The performance and accuracy of the new EOK SAR data-processing algorithm are demonstrated using simulated data in different data collection scenarios and geometries as well as using interferometric data acquired by the airborne experimental SAR system of DLR at L-band (Horn, 1996; Scheiber, 1999). © The Institution of Engineering and Technology 2006.	en
heal.publisher	INSTITUTION ENGINEERING TECHNOLOGY-IET	en
heal.journalName	IEE Proceedings: Radar, Sonar and Navigation	en
dc.identifier.doi	10.1049/ip-rsn:20045087	en
dc.identifier.isi	ISI:000239101700015	en
dc.identifier.volume	153	en
dc.identifier.issue	3	en
dc.identifier.spage	301	en
dc.identifier.epage	310	en