The influence of target acceleration on velocity estimation in dual-channel SAR-GMTI

This paper investigates the effects of target acceleration on estimating the velocity vector of a ground moving target from single-pass dual-channel synthetic aperture radar data. Although vehicles traveling on roads and highways routinely experience acceleration, the majority of estimation algorith...

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Bibliographic Details
Published in:IEEE transactions on geoscience and remote sensing 2006-01, Vol.44 (1), p.134-147
Main Authors: Sharma, J.J., Gierull, C.H., Collins, M.J.
Format: Article
Language:English
Subjects:
Acceleration
Airborne radar
Applied geophysics
Earth sciences
Earth, ocean, space
Estimates
Exact sciences and technology
Grounds
interferometry
Internal geophysics
Matched filters
Mathematical analysis
Moving targets
parameter estimation
Phase estimation
Radar imaging
Radar remote sensing
Remote monitoring
Road transportation
Road vehicles
Roads
Spaceborne radar
Synthetic aperture radar
synthetic aperture radar (SAR)
Vectors (mathematics)
velocity measurement
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Summary:This paper investigates the effects of target acceleration on estimating the velocity vector of a ground moving target from single-pass dual-channel synthetic aperture radar data. Although vehicles traveling on roads and highways routinely experience acceleration, the majority of estimation algorithms assume a constant velocity scenario, which may result in erroneous estimates of target velocity. It is shown that under most conditions, acceleration has only minor effects on the estimation of across-track velocity using along-track interferometric phase. However, under the assumption of constant velocity, acceleration may significantly bias the estimate of along-track velocity. The influence of both along-track and across-track accelerations is examined through simulations of an airborne geometry and experimental data from Environment Canada's airborne CV 580 dual-channel synthetic aperture radar system.
ISSN:0196-2892
1558-0644
DOI:10.1109/TGRS.2005.859343