UDC (621.371.332.3:623.746):51.001.57

Scale physical hydroacoustic modeling of short-range synthetic aperture radar for light UAVs

 

V. N. Trofimov

State Scientific Research Institute for Aviation Systems, Viktorenko str., 7, Moscow 125319 Russia

 

The paper is received on September 19, 2019

 

Abstract. This article describes the technology of scale physical hydroacoustic modeling (SPHM) radar systems. SPHM includes the physical simulation of radar echo signals in hydroacoustic basin and their use in mathematical or hardware-in-the-loop simulation of the radar. It is proposed to use SPHM in the development of synthetic aperture radar (SAR) of short-range, mounted on light UAVs. For radar of this type SPHM allows physical simulation at the scale of not only the wavelength of the radar and linear resolution, but also the distance and height relative to the mapped surface area of the earth, the trajectory of the radar antenna at the time of formation the synthesis of the aperture. SPHM can be used both in the initial and final stages of radar development. The scale factor equal to the ratio of the wavelength of the modeling ultrasonic signal to the wavelength of the simulated radar signal can have values approximately from 1:100 for the X-range to 1:1000 for the L-range of radar wavelengths. The characteristics of the stand SPHM, developed "State Research Institute of Aviation Systems", for modeling  SAR on a scale of 1:100 for the X - range radar are provided. This paper proves the choice of probing ultrasonic signals of the type of discrete frequency sequences (DFS). Radar images of objects with a linear resolution of 10 cm (1 mm on ultrasound) simulated on the stand are presented. The size of the hydroacoustic basins and the requirements to ultrasonic signals for SHPM short range SAR are given. The main technical problems and tasks that should be solved under development of short-range SAR for light UAVs are described. Also, this article shows the advantages of radar probing signals such as DFS for use on radar this type.

Key words: scale physical hydroacoustic modeling, radar images, synthetic aperture radar, light UAVs, ultrasonic waves .

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For citation:

V.N. Trofimov. Scale physical hydroacoustic modeling of short-range synthetic aperture radar for light UAVs.  Zhurnal Radioelektroniki - Journal of Radio Electronics. 2019. No. 9. Available at http://jre.cplire.ru/jre/sep19/7/text.pdf

DOI  10.30898/1684-1719.2019.9.7