title: Estimating Shape and Micro-Motion Parameter of Rotationally Symmetric Space Objects from the Infrared Signature.
abstract: Shape serves as an important additional feature for space target classification, which is complementary to those made available. Since different shapes lead to different projection functions, the projection property can be regarded as one kind of shape feature. In this work, the problem of estimating the projection function from the infrared signature of the object is addressed. We show that the projection function of any rotationally symmetric object can be approximately represented as a linear combination of some base functions. Based on this fact, the signal model of the emissivity-area product sequence is constructed, which is a particular mathematical function of the linear coefficients and micro-motion parameters. Then, the least square estimator is proposed to estimate the projection function and micro-motion parameters jointly. Experiments validate the effectiveness of the proposed method.
authors.affiliation: Automatic Target Recognition Laboratory, National University of Defense Technology, Deya Road, Changsha 410073, China. wuyabei1989@yahoo.com.
authors.forename: Yabei
authors.initials: Y
authors.lastname: Wu
authors.affiliation: Automatic Target Recognition Laboratory, National University of Defense Technology, Deya Road, Changsha 410073, China. luhz@nudt.edu.cn.
authors.forename: Huanzhang
authors.initials: H
authors.lastname: Lu
authors.affiliation: Automatic Target Recognition Laboratory, National University of Defense Technology, Deya Road, Changsha 410073, China. f_z2010@126.com.
authors.forename: Fei
authors.initials: F
authors.lastname: Zhao
authors.affiliation: Automatic Target Recognition Laboratory, National University of Defense Technology, Deya Road, Changsha 410073, China. nudtzzy@163.com.
authors.forename: Zhiyong
authors.initials: Z
authors.lastname: Zhang
keywords: infrared signature; micro-motion; projecting feature; space objects