数据采集与处理2024，Vol.39Issue(2)：312-323,12.DOI:10.16337/j.1004-9037.2024.02.005
基于快速分解后向投影算法的小天体快速三维成像
Fast 3D Imaging of Small Solar System Bodies Based on FFBP Algorithm
胡超然 1韦明川1
作者信息
- 1. 哈尔滨工业大学卫星技术研究所,哈尔滨 150001
- 折叠
摘要
Abstract
Radar imaging technology has attracted increasing attention in the field of deep space exploration due to its fast,non-destructive,and high-resolution characteristics.To address the issue of low computational efficiency in synthetic aperture radar(SAR)3D imaging,a fast factorized back-projection(FFBP)3D imaging algorithm suitable for slow flyby observation modes is proposed leveraging the weak gravity and rapid spin characteristics of small solar system bodies.Initially,the equivalent motion model under slow flyby mode is analyzed,extending the imaging domain from a 2D polar coordinate system to a 3D spherical coordinate system.An in-depth analysis of aperture division and image fusion issues within the 3D FFBP algorithm is conducted,deriving rules for 2D sub-aperture division and recursive image fusion methods,along with a detailed implementation process.Finally,the effectiveness of the algorithm is validated through numerical simulations and measured data.Experimental results show that the proposed imaging algorithm significantly enhances computational efficiency.Compared to the back-projection(BP)algorithm,it can achieve a speedup ratio of 30-50 times while obtaining imaging performance comparable to the classical BP algorithm.关键词
星载雷达/SAR三维成像/快速分解后向投影/太阳系小天体/深空探测Key words
space-borne radar/SAR 3D imaging/fast factorized back-projection(FFBP)/small solar system body/deep space exploration分类
信息技术与安全科学引用本文复制引用
胡超然,韦明川..基于快速分解后向投影算法的小天体快速三维成像[J].数据采集与处理,2024,39(2):312-323,12.
