{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2024,12,30]],"date-time":"2024-12-30T01:40:31Z","timestamp":1735522831187,"version":"3.32.0"},"reference-count":34,"publisher":"MDPI AG","issue":"12","license":[{"start":{"date-parts":[[2020,6,26]],"date-time":"2020-06-26T00:00:00Z","timestamp":1593129600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"The National Key Laboratory Foundation of China","award":["6142411193202"]},{"DOI":"10.13039\/501100001809","name":"The National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["61627901,61431010"],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"name":"The Foundation for Innovative Research Groups of the National Natural Science Foundation of China","award":["61621005"]},{"name":"The National Stability Support Foundation of China","award":["2018SSFNKLSMT-10"]},{"name":"The Chongqing Research Program of Basic Research and Frontier Technology","award":["cstc2018jcyjAX0351"]},{"name":"The Pre-research Fund Project","award":["61404130114, 61404130219"]},{"name":"The Fundamental Research Funds for the Central Universities","award":["2019CDQYTX012"]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"Two unsolved key issues in inverse synthetic aperture radar (ISAR) imaging for non-cooperative rapidly spinning targets including high computational complexity and poor imaging performance in the case of low signal-to-noise ratio (SNR) are addressed in this work. In the strip-map imaging mode of SAR, it is well known that azimuth spatial invariant characteristics exist, and inspired by this, we propose a fast ISAR imaging approach for spinning targets. Our approach involves two steps. First, a precise analytic expression in the range-Doppler (RD) domain is produced using the principle of stationary phase (POSP). Second, a novel interpolation kernel function is designed to remove two-dimensional (2-D) spatial-variant phase errors, and the corresponding fast implementation steps that only require Fourier transform and multiplications are also presented. Finally, a well-focused ISAR image is obtained by compensating the azimuth high-order terms. Compared with current imaging methods, our approach avoids multi-dimensional search and interpolation operations and exploits the 2-D coherent integrated gain; the proposed method is of low computational cost and robustness in the low SNR condition. The effectiveness of the proposed approach is confirmed by numerically simulated experiments.<\/jats:p>","DOI":"10.3390\/rs12122059","type":"journal-article","created":{"date-parts":[[2020,6,29]],"date-time":"2020-06-29T15:17:17Z","timestamp":1593443837000},"page":"2059","source":"Crossref","is-referenced-by-count":0,"title":["A Novel 2-D Geometry Reconstruction Approach for Space Debris via Interpolation-Free Operation under Low SNR Conditions"],"prefix":"10.3390","volume":"12","author":[{"given":"Xi","family":"Luo","sequence":"first","affiliation":[{"name":"School of Physics and Optoelectronic Engineering, Xidian University, Xi\u2019an 710071, China"},{"name":"National Key Laboratory of Science and Technology on Space Microwave, Xi\u2019an 710100, China"}]},{"given":"Lixin","family":"Guo","sequence":"additional","affiliation":[{"name":"School of Physics and Optoelectronic Engineering, Xidian University, Xi\u2019an 710071, China"}]},{"given":"Dong","family":"Li","sequence":"additional","affiliation":[{"name":"School of Microelectronics and Communication Engineering, Chongqing University, Chongqing 400044, China"},{"name":"Chongqing Key Laboratory of Space Information Network and Intelligent Information Fusion, Chongqing University, Chongqing 400044, China"}]},{"given":"Hongqing","family":"Liu","sequence":"additional","affiliation":[{"name":"Chongqing Key Laboratory of Mobile Communications Technology, Chongqing University of Posts and Telecommunication, Chongqing 400065, China"}]},{"given":"Mengyi","family":"Qin","sequence":"additional","affiliation":[{"name":"School of Microelectronics and Communication Engineering, Chongqing University, Chongqing 400044, China"}]}],"member":"1968","published-online":{"date-parts":[[2020,6,26]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"134","DOI":"10.1109\/7.913673","article-title":"Risks of particle hits during space walks in low Earth orbit","volume":"37","author":"Sachon","year":"2001","journal-title":"IEEE Trans. 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