Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/39821
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Type: Conference paper
Title: The effect of polar format resampling on uncompensated motion phase errors and the phase gradient autofocus algorithm
Author: Preiss, M.
Gray, D.
Stacy, N.
Citation: IGARSS 2001 : proceedings : IEEE 2001 International Geoscience and Remote Sensing Symposium : scanning the present and resolving the future : 9-13 July 2001, University of New South Wales, Sydney, Australia / vol. 3, pp. 1442 - 1444
Publisher: IEEE - Institute of Electrical and Electronics Engineers
Issue Date: 2001
ISBN: 0780370317
Conference Name: IEEE International Geoscience and Remote Sensing Symposium (2001 : Sydney, N.S.W.)
Statement of
Responsibility: 
Preiss, M. ; Gray, D. ; Stacy, N.J.S.
Abstract: The phase gradient algorithm (PGA) is an autofocus technique applied after SAR image formation for correcting uncompensated motion phase errors. A crucial aspect of the algorithm is the assumed phase error model used to describe the motion errors in the phase history data. In this paper it is shown that the Polar Format Algorithm (PFA) image formation processor introduces a distortion to the phase error that is not considered in the PGA formulation. It is shown that the PFA distortions degrade the point target response in the PGA image output and act as a source of relative phase errors in repeat pass SAR interferometry applications
Description: © Copyright 2001 IEEE
RMID: 0020073799
DOI: 10.1109/IGARSS.2001.976872
Appears in Collections:Electrical and Electronic Engineering publications

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