Abstract
In this paper, a time domain stripmap mode Synthetic Aperture Radar (SAR) raw data simulation including both the terrain and the targets is proposed. The simulator generates SAR raw data of a scene, involving both single and double reflections in a computationally efficient manner. The inputs of the simulator are the digital elevation model of the terrain, the 3D target model, and the parameters of the SAR system. The simulator extracts a geometrically accurate reflectivity map and generates the SAR raw data in time domain. The disadvantage of time domainmethod is justified to be tolerable by presenting experiments onmodularity performance of the simulator. Also a novel method to decrease the time domain computational complexity of the SAR raw data generation is proposed. Our method has showed very promising results in representing the scattering characteristics, the raw data, and the time domain simulation flexibility.
Highlights
Synthetic Aperture Radar (SAR) is a powerful remote sensing technique that enables monitoring of surface by using the surface backscattering characteristics obtained under illumination of microwaves
The digital elevation model, target model, and the sensor parameters are the inputs of the simulator
In order to observe the final SAR image, image formation is done by the range and azimuth compression, respectively
Summary
SAR is a powerful remote sensing technique that enables monitoring of surface by using the surface backscattering characteristics obtained under illumination of microwaves. SAR simulators are used in measurement of performance, design of new algorithms, hardware, and architectures, for mission planning and sensor organization, and developing image exploitation techniques. Based on those application areas, the SAR data simulators can be classified into two groups [1]: the image-oriented simulators [2,3,4,5] for the applications like mission planning, automatic target recognition, or georegistration of SAR images and signal-oriented simulators [6,7,8,9] for algorithm design. There are three main expectations that a SAR simulator shall meet: (1) accuracy, (2) modularity, and (3) computational efficiency. One of the accuracy parameter of a SAR simulator can be a wide coverage of the scattering concepts for the reflection computation
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