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A SAR satellite radar echo simulation method, system and medium

A radar echo simulation and satellite technology, which is applied in the field of SAR satellite radar echo simulation, can solve problems such as unrealistic echo simulators, and achieve the effects of fast echo signal simulation, accurate data, and improved accuracy and authenticity.

Active Publication Date: 2020-06-09
BEIJING INST OF SPACECRAFT SYST ENG
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Problems solved by technology

[0006] The technical problem solved by the present invention is: to overcome the deficiencies in the prior art, to provide a SAR satellite radar echo simulation method, system and medium, to solve the problem that the echo simulator is unreal during the SAR satellite's in-orbit motion, and to reduce the The gap in the working status of satellites in orbit

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  • A SAR satellite radar echo simulation method, system and medium
  • A SAR satellite radar echo simulation method, system and medium
  • A SAR satellite radar echo simulation method, system and medium

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Embodiment Construction

[0056] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0057] The present invention designs a kind of SAR satellite radar echo simulation method and comprises following 6 steps: 1) obtain SAR satellite on-orbit real-time working position, velocity, acceleration and time information; 2) obtain satellite working posture information, determine satellite current antenna pointing; 3) Use the interpolation algorithm to obtain the satellite, velocity, and acceleration information of the satellite at the current moment; 4) Calculate the echo gain between the satellite and the simulated target; 5) Establish the echo signal model of the spaceborne SAR point target; 6) Through multiple The point target echoes are superimposed to form the echo signal model of the SAR scene. Through the above six steps, the SAR satellite echo signal data is finally obtained, which improves the authenticity of the SAR echo sim...

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Abstract

The invention provides an SAR satellite radar echo simulation method and system and a medium. The method is characterized by, according to attitude information transmitted by a satellite in real time,determining current antenna pointing of the satellite; obtaining satellite position, speed and acceleration information by searching a PVT table, and carrying out interpolation calculation to obtainthe position of the satellite at the current time; calculating the distance between the satellite and a ground simulation target and due gain of a current target echo; establishing an echo signal mathematical model of a space-borne SAR point target; and through superposition of target echo models of a plurality of points, generating an echo signal of a space-borne SAR scene, and finally, obtainingSAR satellite echo signal data. The method improves truthfulness of SAR echo simulation; and through an SAR scene generation method based on multipoint target superposition, different types of scenescan be generated more quickly.

Description

technical field [0001] The invention relates to a SAR (Synthetic Aperture Radar) satellite radar echo simulation method, system and medium, which are applicable to the SAR satellite imaging performance test and belong to the technical field of SAR satellite radar echo simulation. Background technique [0002] Radar remote sensing has all-weather, all-weather imaging and certain penetration advantages. Synthetic aperture radar imaging satellites have been widely used in earth observation systems at home and abroad, and have played a very important role in military reconnaissance and national economic development. For example, Lacrosse in the United States, ENVISAT in ESA, SAR-Lupe and TerraSAR in Germany, Cosmo-Skymed in Italy, Radarsat in Canada, JERS-1 and ALOS in Japan, KOMSAT-5 in South Korea, Russia Almaz of India and Risat of India etc. In recent years, my country has also made remarkable achievements in synthetic aperture radar imaging satellites, and successively suc...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/40
CPCG01S7/4052
Inventor 于忠江安亮李延刘滕冲刘勇侯锐向永清徐寅辉王帆帆齐天乐
Owner BEIJING INST OF SPACECRAFT SYST ENG
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