LRCS calculation and imaging of complex target based on GRECO

Wen Wu; Fu-chang Xu; Xiang'e Han

doi:10.1117/12.2034920

19 September 2013 LRCS calculation and imaging of complex target based on GRECO

Wen Wu, Fu-chang Xu, Xiang'e Han

Proceedings Volume 8905, International Symposium on Photoelectronic Detection and Imaging 2013: Laser Sensing and Imaging and Applications; 89052A (2013) https://doi.org/10.1117/12.2034920
Event: ISPDI 2013 - Fifth International Symposium on Photoelectronic Detection and Imaging, 2013, Beijing, China

Abstract

The research on Laser Radar Cross Section(LRCS) is of great significance in many research fields, such as defense, aviation, aerospace, meteorology etc. Current study of LRCS focuses mainly on the full-size target. The LRCS of full-size target, characterized by the scattering properties of the target, is influenced by target material, shape, size, and the wavelength of laser, but it is independent on the size of irradiation beam. In fact, when the target is in large size, and the beam emitted from laser radar is very narrow, it may be in a local rather than a full-size irradiation. In this case, the scattering properties of a target are dependent on not only the size of irradiation beam on the target, but also the direction of irradiation beam. Therefore, it is essential to analyze the scattering properties of a complex target in a local irradiation. Based on the basic theory of Graphic-electromagnetic Computing(GRECO), we improved the method used in the processing of electromagnetic scattering, calculated the monostatic and bistatic LRCS of several targets. The results are consistent with that in the early work done by other researchers. In addition, by changing the divergence angle of the incident beam, the situation of narrow beam in a local irradiation was presented. Under different sizes of irradiation beam, analysis and calculation of local cross section was made in detail. The results indicate that the size of irradiation beam can greatly affect the LRCS for targets. Finally, we calculated scattering cross section per unit of each location point; with color tag, scattering intensity distribution of every location point on the target was displayed, which can be revealed by the color of every pixel point. On the basis of scattering intensity distribution of every location point, the imaging of a target was realized, which provides a reference for quick identification of the target.

Citation Download Citation

Wen Wu, Fu-chang Xu, and Xiang'e Han "LRCS calculation and imaging of complex target based on GRECO", Proc. SPIE 8905, International Symposium on Photoelectronic Detection and Imaging 2013: Laser Sensing and Imaging and Applications, 89052A (19 September 2013); https://doi.org/10.1117/12.2034920

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