Sensitivity of back‐projection algorithm (BPA) synthetic aperture radar (SAR) image formation to initial position, velocity, and attitude navigation errors

Lindstrom, Colton; Christensen, Randall; Gunther, Jacob; Jenkins, Scott

doi:10.1049/rsn2.12189

Title: Sensitivity of back‐projection algorithm (BPA) synthetic aperture radar (SAR) image formation to initial position, velocity, and attitude navigation errors

Journal Article · 04 November 2021 · IET Radar, Sonar & Navigation

DOI: https://doi.org/10.1049/rsn2.12189 · OSTI ID:1829099

^[1];

^[1]; Gunther, Jacob ^[1]; Jenkins, Scott ^[2]

Department of Electrical and Computer Engineering Utah State University Logan Utah USA
Department of Navigation, Pointing, and Control and Systems Integration Sandia National Laboratories Albuquerque New Mexico USA

Abstract The Back‐Projection Algorithm (BPA) is a time‐domain‐matched filtering technique to form synthetic aperture radar (SAR) images. To produce high‐quality BPA images, precise navigation data for the radar platform must be known. Errors in position, velocity, or attitude result in improperly formed images that are corrupted by shifting and blurring. The contribution of this paper is the development of analytical expressions that characterise the relationship between navigation errors and image formation errors from an inertial navigation point of view, where trajectory estimation errors in position, velocity, and attitude propagate through time and cause compounding errors in the vehicle state vector. These analytical expressions are verified via simulated image formation and real‐data image formation.

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Sponsoring Organization:: USDOE

OSTI ID:: 1829099

Journal Information:: IET Radar, Sonar & Navigation, Journal Name: IET Radar, Sonar & Navigation Journal Issue: 2 Vol. 16; ISSN 1751-8784

Publisher:: Institution of Engineering and Technology (IET)Copyright Statement

Country of Publication:: United Kingdom

Language:: English

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