Micro-motion extraction from spotlight SAR using a modified backprojection approach
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.
Authors
- Massimo Zavagli
- Francesca Rollo (ORCID: https://orcid.org/0000-0003-2724-872X)
- Alessandro Lotti (ORCID: https://orcid.org/0000-0003-2313-5007)
- Daniele Zonta (ORCID: https://orcid.org/0000-0002-7591-9519)
- Carmine Clemente (ORCID: https://orcid.org/0000-0002-6665-693X)
- Enrico Tubaldi (ORCID: https://orcid.org/0000-0001-8565-8917)
- Daniel Tonelli (ORCID: https://orcid.org/0000-0002-9089-4583)
- Malcolm Macdonald (ORCID: https://orcid.org/0000-0003-4499-4281)
- Pietro Milillo (ORCID: https://orcid.org/0000-0002-1171-3976)
- Christos Ilioudis (ORCID: https://orcid.org/0000-0002-7164-6461)
- Greta Zefi
- Mario Constantini
Institutions
- University of Strathclyde (GB)
- University of Trento (IT)
- University of Houston (US)
Publication Details
- Published
- 2024-11-19
- DOI
- https://doi.org/10.1117/12.3031678
- Citations
- 5
- Primary Topic
- Advanced SAR Imaging Techniques
- Type
- article
- Field-Weighted Citation Impact
- 6.49