Aspects of 3D tomography for multiple-pass spotlight-mode airborne SAR

Author

Pincus, P.B. ; Preiss, M. ; Gray, D.A.

Author_Institution

Defence Sci. & Technol. Organ., Edinburgh, SA, Australia

Volume

3

fYear

2009

fDate

12-17 July 2009

Abstract

Three-dimensional SAR tomography makes use of radar data acquired at different depression angles to synthesise an aperture in elevation and thereby undo layover and resolve along height. Focusing on one tomographic method appropriate to a spotlight-mode airborne collection system, the details of spatial bandwidth usage and point-spread function are described, and the phase modulation effects of the initial two-dimensional image formation stage are analysed in terms of the impact on the tomographic processing. Finally, an adaptive beamforming approach is investigated for the improvement of height resolution.

Keywords

airborne radar; geophysical image processing; synthetic aperture radar; tomography; 3D focusing; 3D tomography; adaptive beamforming approach; height resolution; image formation; multiple-pass spotlight-mode airborne SAR; phase modulation effects; point-spread function; spatial bandwidth usage; spotlight-mode airborne collection system; synthetic aperture radar; tomographic processing; Array signal processing; Australia; Bandwidth; Focusing; Image reconstruction; Layout; Reflectivity; Spatial resolution; Synthetic aperture radar; Tomography; 3D focusing; Synthetic aperture radar (SAR); tomography;

fLanguage

English

Publisher

ieee

Conference_Titel

Geoscience and Remote Sensing Symposium,2009 IEEE International,IGARSS 2009

Conference_Location

Cape Town

Print_ISBN

978-1-4244-3394-0

Electronic_ISBN

978-1-4244-3395-7

Type

conf

DOI

10.1109/IGARSS.2009.5417929

Filename

5417929