Method of generating simulated airborne fire control radar sar image based on dem data

Abstract

The method for generating a simulated airborne fire control radar SAR image based on DEM data disclosed by the present invention includes: reading DEM data in tiff format, determining that the position of the imaging center is within the range of the DEM data; calculating the imaging center according to the latitude and longitude values ​​of the imaging center The subscript value in the DEM data elevation matrix; intercept the DEM data sub-block corresponding to the SAR imaging simulation; rotate the DEM data sub-block, and the radar azimuth beam pointing angle of the DEM data sub-block after rotation is 180 degrees; The rotated DEM data sub-block performs SAR image simulation based on feature simulation; rotates the simulated SAR image to make the image change to the standard direction; intercepts the SAR image of the specified size for output. The invention can use less computing resources and quickly and in real time meet the real-time SAR imaging simulation requirements of the airborne fire control radar with an observation area of ​​several thousand kilometers.

Description

technical field [0001] The invention relates to the technical field of synthetic aperture radar simulation, in particular to a method for generating a simulated airborne fire control radar SAR image based on DEM data. Background technique [0002] Synthetic Aperture Radar (SAR) imaging has the advantages of all-day, all-weather, and penetrability. It can obtain high-resolution radar images of targets in different frequency bands and different polarizations, providing people with very useful information. Target information has been widely used in many fields such as economy and science and technology, and has broad application prospects and development potential. [0003] Real SAR images can only be obtained through flight tests carried by an aircraft with an imaging radar in the sky, and the cost of flight tests is very high. Obtaining SAR images by means of simulation, conducting flight training for pilots and verifying the use of SAR images can greatly reduce training cos...

AI Technical Summary

Problems solved by technology

The general SAR image simulation has the following problems: First, it focuses on the simulation of the scene of the front-view SAR image, and does not involve the airborne fire control radar squint SAR image simulation; the second is that the SAR image simulation is only for the designated small-scale area. , it cannot solve the problem of imaging in a large geographical area (such as East Asia) and in a large and wide range during ground flight simulation; the third is that it cannot solve the problem of a DEM base map in tiff format, supporting different resolutions and imaging at different locations; It requires more computing resources, the efficiency is not high, and some require a dedicated DSP chip processor

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