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

Finlay Gardiner Rollo; Christos Ilioudis; Greta Zefi; Alessandro Lotti; Daniel Tonelli; Massimo Zavagli; Mario  Constantini; Daniele Zonta; Enrico Tubaldi; Pietro Milillo; Malcolm Macdonald; Carmine Clemente

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

Finlay Gardiner Rollo^*, Christos Ilioudis, Greta Zefi, Alessandro Lotti, Daniel Tonelli, Massimo Zavagli, Mario Constantini, Daniele Zonta, Enrico Tubaldi, Pietro Milillo, Malcolm Macdonald, Carmine Clemente

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution book

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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.

Original language	English
Title of host publication	Sensors + Imaging, 2024, Edinburgh
Publication status	Accepted/In press - 19 Sept 2024
Event	SPIE Sensors and Imaging 2024 - Edinburgh, United Kingdom Duration: 16 Sept 2024 → 19 Sept 2024 https://spie.org/conferences-and-exhibitions/sensors-and-imaging

Conference

Conference	SPIE Sensors and Imaging 2024
Country/Territory	United Kingdom
City	Edinburgh
Period	16/09/24 → 19/09/24
Internet address	https://spie.org/conferences-and-exhibitions/sensors-and-imaging

Funding

This research is funded by the European Space Agency under the projects “Bridge Monitoring Based on Single Pass SAR Images” and “EO4Security- Innovative SAR Processing Methodologies For Security Applications-Topic B2: Micro-Doppler Processing”. This work was in part performed at the University of Houston under a contract with the NASA Commercial Smallsat Data Acquisition Program (QKWEF8XLMTT3). Thanks to Capella Space for access to the datasets.

Keywords

micro-motion
SAR
micro-Doppler
vibration

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Micro-motion extraction from spotlight SAR using a modifiedSubmitted manuscript, 1.08 MBLicence: CC BY 4.0

Cite this

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title = "Micro-motion extraction from spotlight SAR using a modified backprojection approach",

abstract = "Typically, an image formed using the backprojection algorithm is the coherent sum of every pulse{\textquoteright}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 onboth simulated data and compensated phase history data (CPHD) acquired by Capella Space.",

keywords = "micro-motion, SAR, micro-Doppler, vibration",

author = "Rollo, {Finlay Gardiner} and Christos Ilioudis and Greta Zefi and Alessandro Lotti and Daniel Tonelli and Massimo Zavagli and Mario Constantini and Daniele Zonta and Enrico Tubaldi and Pietro Milillo and Malcolm Macdonald and Carmine Clemente",

year = "2024",

month = sep,

day = "19",

language = "English",

booktitle = "Sensors + Imaging, 2024, Edinburgh",

note = "SPIE Sensors and Imaging 2024 ; Conference date: 16-09-2024 Through 19-09-2024",

url = "https://spie.org/conferences-and-exhibitions/sensors-and-imaging",

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TY - GEN

T1 - Micro-motion extraction from spotlight SAR using a modified backprojection approach

AU - Rollo, Finlay Gardiner

AU - Ilioudis, Christos

AU - Zefi, Greta

AU - Lotti, Alessandro

AU - Tonelli, Daniel

AU - Zavagli, Massimo

AU - Constantini, Mario

AU - Zonta, Daniele

AU - Tubaldi, Enrico

AU - Milillo, Pietro

AU - Macdonald, Malcolm

AU - Clemente, Carmine

PY - 2024/9/19

Y1 - 2024/9/19

N2 - 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 onboth simulated data and compensated phase history data (CPHD) acquired by Capella Space.

AB - 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 onboth simulated data and compensated phase history data (CPHD) acquired by Capella Space.

KW - micro-motion

KW - SAR

KW - micro-Doppler

KW - vibration

UR - https://spie.org/conferences-and-exhibitions/sensors-and-imaging#_=_

M3 - Conference contribution book

BT - Sensors + Imaging, 2024, Edinburgh

T2 - SPIE Sensors and Imaging 2024

Y2 - 16 September 2024 through 19 September 2024

ER -

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

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