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Optical Engineering

Micromotion dynamics and geometrical shape parameters estimation of exoatmospheric infrared targets
Author(s): Junliang Liu; Yabei Wu; Huanzhang Lu; Bendong Zhao
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Paper Abstract

The micromotion dynamics and geometrical shape are considered to be essential characteristics for exoatmospheric targets discrimination. Many methods have been investigated to retrieve the micromotion features using radar signals returned from targets of a given shape. We explore a way of jointly estimating micromotion dynamics and geometrical shape parameters from the infrared (IR) signals of targets in remote detection distance. It is found that the micromotion dynamics of the target would induce a periodic fluctuating variation on the IR irradiance intensity signature. In addition to the micromotion characteristics, the fluctuation could also reflect target structure properties, which offer a possible clue in extracting the features of micromotion dynamics and geometrical shape. Thus, the data model of target IR irradiance intensity signatures induced by micromotion patterns including spinning, coning, and tumbling is developed, and a method of parameters estimation based on joint optimization analysis techniques is proposed. Experimental results demonstrated that the parameters of target micromotion dynamics and geometrical shape can be effectively estimated using the proposed method, if the input signature contains multiple dominant frequency components.

Paper Details

Date Published: 17 November 2016
PDF: 12 pages
Opt. Eng. 55(11) 113103 doi: 10.1117/1.OE.55.11.113103
Published in: Optical Engineering Volume 55, Issue 11
Show Author Affiliations
Junliang Liu, National Univ. of Defense Technology (China)
Yabei Wu, National Univ. of Defense Technology (China)
Huanzhang Lu, National Univ. of Defense Technology (China)
Bendong Zhao, National Univ. of Defense Technology (China)


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