Abstract

While imaging geosynchronously orbiting objects with ground-based inverse synthetic aperture LADAR (ISAL), target rotation and vibration will introduce phase errors into the echo and cause the two-dimensional imaging result to be defocused. To solve this problem, one layout of the ISAL receiving channels is designed, combining the orthogonal short baselines in the inner field with the orthogonal long baselines in the external field. On this basis, an imaging method based on orthogonal interferometry processing is proposed. The proposed method estimates and compensates for the phase errors introduced by the rotation and vibration of the target such that the focus of the two-dimensional image is improved, and three-dimensional imaging results with high accuracy are obtained. The effectiveness of the proposed method is verified by simulation data.

© 2019 Optical Society of America

Vibration phases estimation based on multi-channel interferometry for ISAL

Xuan Hu and Daojing Li
Appl. Opt. 57(22) 6481-6490 (2018)

Vibration phases estimation based on orthogonal interferometry of inner view field for ISAL imaging and detection

Kai Zhou, Daojing Li, Jinghan Gao, Anjing Cui, Jiang Wu, Shumei Wu, Yefei Wang, Kai Liu, Songnian Tan, Yang Gao, and Yuan Yao
Appl. Opt. 62(11) 2845-2854 (2023)

Inverse synthetic aperture ladar autofocus imaging algorithm for micro-vibrating satellites based on two prominent points

Zi-Qi Song, Di Mo, Ning Wang, Bing-Chen Li, Yong-She Shao, and Rong-Qing Tan
Appl. Opt. 58(25) 6775-6783 (2019)

Moving target imaging of a dual-channel ISAL with binary phase shift keying signals and large squint angles

Anjing Cui, Daojng Li, Jiang Wu, Kai Zhou, Jinghan Gao, Ming Qiao, Shumei Wu, Yefei Wang, and Yuan Yao
Appl. Opt. 61(18) 5466-5473 (2022)

Inverse synthetic aperture ladar imaging based on modified cubic phase function

Si Gao, Zenghui Zhang, Wenxian Yu, Manqing Wu, and Guangzuo Li
Appl. Opt. 60(7) 2014-2021 (2021)