Marine multi-target SAR image visual modeling method

Abstract

The invention relates to a marine multi-target SAR image visual modeling method. On the basis of a graphical electromagnetic computing (GRECO) method, a random sea surface model generated by a sea spectrum is introduced, meanwhile, multiple marine targets are loaded, the relative positions and the postures of the marine targets on the whole scene are set, so that a sea surface multi-target scene is formed, the contributions of all the sub-targets on the whole scene and the contribution of the sea surface to radar echoes are calculated, finally, radar echo data of the whole scene are obtained, and a synthetic aperture radar (SAR) image of the scene is calculated through the radar echo data, wherein when a large marine target such as an aircraft carrier is calculated, a partition calculation method is adopted. The marine multi-target SAR image visual modeling method has the advantages that the precision of electromagnetic computing can be improved; the reliability of the SAR image of the scene is higher, and the resolution is high; the method is high in flexibility, fast to use, low in cost and higher in universality.

Description

technical field [0001] The invention relates to a modeling method, in particular to a visualization modeling method for multi-target SAR images at sea. Background technique [0002] Synthetic Aperture Radar (SAR) is an all-weather, all-weather modern high-resolution side-view imaging radar, which can not be affected by factors such as sunshine and weather, and has certain penetrating power. It is an important means of observation and has been widely used in many fields. SAR imaging simulation and system simulation technology is an effective way to reveal the mechanism of SAR imaging, verify and design new imaging algorithms. [0003] Nowadays, SAR imaging simulation mainly performs simulation calculations for terrain scenes, point targets or single complex targets. Due to the specific environment of the sea target, the SAR images of the sea clutter and the sea target composite target are more practical. At the same time, the size of the sea ship target is often large, whic...

AI Technical Summary

Problems solved by technology

Due to the specific environment of the sea target, the SAR image of the sea clutter and the sea target composite target is more practical. At the same time, the size of the sea ship target is often large, which makes it more difficult to obtain high-precision SAR imaging.

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