Three-dimensional imaging using differential synthetic aperture interferometry

Ning Zhang; Yu Zhou; Jianfeng Sun; Ya'nan Zhi; Zhiyong Lu; Qian Xu; Zhiwei Sun; Liren Liu

doi:10.1117/12.2060470

18 September 2014 Three-dimensional imaging using differential synthetic aperture interferometry

Ning Zhang, Yu Zhou, Jianfeng Sun, Ya'nan Zhi, Zhiyong Lu, Qian Xu, Zhiwei Sun, Liren Liu

Proceedings Volume 9227, Unconventional Imaging and Wavefront Sensing 2014; 92270D (2014) https://doi.org/10.1117/12.2060470
Event: SPIE Optical Engineering + Applications, 2014, San Diego, California, United States

Abstract

Synthetic aperture radar interferometry (InSAR) can gain three-dimensional topography with high spatial resolution and height accuracy using across track interferometry[1]. Conventional InSAR produce three-dimensional images from SAR data. But when the working wavelength transit from microwave to optical wave, the transmission antenna and receive antenna become very sensitive to platform vibration and beam quality[2]. Through differential receive antenna formation, we can relax the requirement of platform and laser using synthetic aperture imaging ladar (SAIL) concept[3]. Line-of-sight motion constraints are reduced by several orders of magnitude. We introduce two distinctive forms of antenna formation according to the position of interferogram. The first architecture can simplify the interferogram processing and phase extraction algorithm under time-division multiplex operation. The second architecture can process the 2D coordinate and height coordinate at the same time. Using optical diffraction theory, a systematic theory of side-looking SAIL is mathematically formulated and the necessary conditions for assuring a correct phase history are established[4]. Based on optical transformation and regulation of wavefront, a side-looking SAIL of two distinctive architectures is invented and the basic principle, systematic theory, design equations and necessary conditions are presented. It is shown that high height accuracy can be reached and the influences from atmospheric turbulence and unmodeled line-of-sight motion can be automatically compensated.

Citation Download Citation

Ning Zhang, Yu Zhou, Jianfeng Sun, Ya'nan Zhi, Zhiyong Lu, Qian Xu, Zhiwei Sun, and Liren Liu "Three-dimensional imaging using differential synthetic aperture interferometry", Proc. SPIE 9227, Unconventional Imaging and Wavefront Sensing 2014, 92270D (18 September 2014); https://doi.org/10.1117/12.2060470

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KEYWORDS

Antennas

3D image processing

Interferometry

Interferometric synthetic aperture radar

Synthetic aperture radar

3D acquisition

Reflection

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