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Proceedings Paper

A method to evaluate residual phase error for polar formatted synthetic aperture radar systems
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Paper Abstract

Synthetic aperture radar systems that use the polar format algorithm are subject to a focused scene size limit inherent to the polar format algorithm. The classic focused scene size limit is determined from the dominant residual range phase error term. Given the many sources of phase error in a synthetic aperture radar, a system designer is interested in how much phase error results from the assumptions made with the polar format algorithm. Autofocus algorithms have limits to the amount and type of phase error that can be corrected. Current methods correct only one or a few terms of the residual phase error. A system designer needs to be able to evaluate the contribution of the residual or uncorrected phase error terms to determine the new focused scene size limit. This paper describes a method to estimate the complete residual phase error, not just one or a few of the dominant residual terms. This method is demonstrated with polar format image formation, but is equally applicable to other image formation algorithms. A benefit for the system designer is that additional correction terms can be added or deleted from the analysis as necessary to evaluate the resulting effect upon image quality.

Paper Details

Date Published: 31 May 2013
PDF: 10 pages
Proc. SPIE 8714, Radar Sensor Technology XVII, 871413 (31 May 2013); doi: 10.1117/12.2014929
Show Author Affiliations
Cameron Musgrove, Sandia National Labs. (United States)
Richard Naething, Sandia National Labs. (United States)


Published in SPIE Proceedings Vol. 8714:
Radar Sensor Technology XVII
Kenneth I. Ranney; Armin Doerry, Editor(s)

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