Imaging Components, Systems, and Processing

Micromotion dynamics and geometrical shape parameters estimation of exoatmospheric infrared targets

[+] Author Affiliations
Junliang Liu, Yabei Wu, Huanzhang Lu, Bendong Zhao

National University of Defense Technology, National Key Laboratory of Automatic Target Recognition (ATR), College of Electronic Science and Engineering, Deya Road 109, Kaifu District, Changsha, Hunan 410073, China

Opt. Eng. 55(11), 113103 (Nov 17, 2016). doi:10.1117/1.OE.55.11.113103
History: Received June 12, 2016; Accepted October 18, 2016
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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.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Junliang Liu ; Yabei Wu ; Huanzhang Lu and Bendong Zhao
"Micromotion dynamics and geometrical shape parameters estimation of exoatmospheric infrared targets", Opt. Eng. 55(11), 113103 (Nov 17, 2016). ; http://dx.doi.org/10.1117/1.OE.55.11.113103


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