Micro-motion extraction from spotlight SAR using a modified backprojection approach

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Rollo, Finlay Gardiner and Ilioudis, Christos and Zefi, Greta and Lotti, Alessandro and Tonelli, Daniel and Zavagli, Massimo and Constantini, Mario and Zonta, Daniele and Tubaldi, Enrico and Milillo, Pietro and Macdonald, Malcolm and Clemente, Carmine; (2024) Micro-motion extraction from spotlight SAR using a modified backprojection approach. In: Sensors + Imaging, 2024, Edinburgh. SPIE, GBR. (In Press)

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Abstract

Typically, an image formed using the backprojection algorithm is the coherent sum of every pulse’s contribution to every image pixel, accounting for the respective time delays and phase corrections. This allows for highly accurate image reconstruction. The modification proposed, differs in that the contributions of every pulse are concatenated to form a 3D radar data cube, instead of being coherently summed. This approach allows for the precise analysis of how the phase of individual target pixels change over time. In this work, the phase is utilized to accurately reconstruct the amplitude and frequency of a vibrating target. This method is demonstrated on both simulated data and compensated phase history data (CPHD) acquired by Capella Space.

ORCID iDs

Rollo, Finlay Gardiner, Ilioudis, Christos ORCID logoORCID: https://orcid.org/0000-0002-7164-6461, Zefi, Greta, Lotti, Alessandro, Tonelli, Daniel, Zavagli, Massimo, Constantini, Mario, Zonta, Daniele, Tubaldi, Enrico, Milillo, Pietro, Macdonald, Malcolm ORCID logoORCID: https://orcid.org/0000-0003-4499-4281 and Clemente, Carmine ORCID logoORCID: https://orcid.org/0000-0002-6665-693X;
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