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29 April 2009 Passive millimeter-wave imaging polarimeter system
Christopher M. Persons, Christopher A. Martin, Michael W. Jones, Vladimir Kolinko, John A. Lovberg
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Proceedings Volume 7309, Passive Millimeter-Wave Imaging Technology XII; 730907 (2009) https://doi.org/10.1117/12.817611
Event: SPIE Defense, Security, and Sensing, 2009, Orlando, Florida, United States
Abstract
The Army has identified a need to rapidly identify, map, and classify natural and manmade features to aid situational awareness as well as mission and tactical planning. To address these needs, Digital Fusion and Trex Enterprises have designed a full Stokes, passive MMW imaging polarimeter that is capable of being deployed on an unmanned aerial vehicle. Results of a detailed trade study are presented, where an architecture, waveband and target platform are selected. The selected architecture is a pushbroom phased-array system, which allows the system to collect a wide fieldof- view image with minimal components and weight. W band is chosen as a trade-off between spatial resolution, weather penetration, and component availability. The trade study considers several unmanned aerial system (UAS) platforms that are capable of low-level flight and that can support the MMW antenna. The utility of the passive Stokes imager is demonstrated through W band phenomenology data collections at horizontal and vertical polarization using a variety of natural and manmade materials. The concept design is detailed, along with hardware and procedures for both radiometric and polarimetric calibration. Finally, a scaled version of the concept design is presented, which is being fabricated for an upcoming demonstration on a small, manned aircraft.
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Christopher M. Persons, Christopher A. Martin, Michael W. Jones, Vladimir Kolinko, and John A. Lovberg "Passive millimeter-wave imaging polarimeter system", Proc. SPIE 7309, Passive Millimeter-Wave Imaging Technology XII, 730907 (29 April 2009); https://doi.org/10.1117/12.817611
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KEYWORDS
Calibration
Polarization
Polarimetry
Extremely high frequency
Phased arrays
Imaging systems
Sensors
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