A Synthetic Aperture Radar Image Model of Ship on Sea

Tong Wang,Xi-Min Li,Qian Gao,Chuang-Ming Tong,J Heled,A Yuan

doi:10.1051/matecconf/201817301027

Tong Wang, Xi-Min Li + Show 4 more

Open Access

https://doi.org/10.1051/matecconf/201817301027

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Abstract

Double scattering between the ship and sea surface is an important characteristic for ship detection. Based on geometrical optics (GO), a modified GO-GO solution is presented to evaluate the double scattering from sea and the tilt facets of ship at high frequency. Direct scattering contributions from ship and sea are evaluated by using physical optics (PO). To get a synthetic aperture radar (SAR) image, double bounce and shadow effects on range dimension of SAR image are considered. The results show the relationship between the azimuth angle and the scattering power. The research on SAR image of ship-sea and results about double scattering between ship and sea have a great application value in ship detection from SAR image.

Highlights

Many ships have huge size and their two sides will form dihedral or approximate dihedral
Combining with the ray tracing theory, double scattering model is proposed for dealing with the synthetic aperture radar (SAR) imaging problem between canonical target and rough surface
Facet modified geometrical optics (GO)-GO and GO-physical optics (PO) models have been proposed to be applied into SAR imaging

Summary

INTRODUCTION

Many ships have huge size and their two sides will form dihedral or approximate dihedral In this situation, multiple scattering will dominate the backscattering field. GO and PO are often used to evaluate the scattering from ground or sea Both of the models are very appealing for rough surface scattering simulation due to their ease of implementation and identifying important underlying physical processes (Franceschetti, 2002; Masona, 2014; Ferro, 2008). GO-GO and GO-PO are used based on the roughness of surface respectively Both of the models are first proposed to cope with the SAR imaging of urban scene in which the target is the vertical building (Franceschetti, 2003; Ferro, 2008). The situation in which the lateral sides of ship are not vertical to the mean sea

DOUBLE SCATTERING

SAR IMAGING

SIMULATION AND RESULTS

CONCLUSIONS