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Space target inverse synthetic aperture radar imaging parameter design method

An inverse synthetic aperture and radar imaging technology, which is applied in the directions of radio wave reflection/re-radiation, utilization of re-radiation, and measurement devices, can solve problems such as insufficient calculation accuracy of radar beam pointing system parameters, and achieve increased observable range, Increase the duty cycle and average transmit power to ensure the effect of complete recording

Active Publication Date: 2017-12-26
BEIJING INST OF SPACECRAFT SYST ENG
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Problems solved by technology

[0005] The technical problem of the present invention is: to overcome the deficiencies of the prior art, the present invention provides a space target inverse synthetic aperture radar imaging parameter design method, by fully considering the motion characteristics of the space target to be imaged and the limitations of the radar system, combined with STK software virtual A design method for space target inverse synthetic aperture radar imaging parameters is given, which solves the problem of insufficient calculation accuracy of space target motion parameters, radar beam pointing and system parameters in the traditional space target inverse synthetic aperture radar imaging parameter design

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  • Space target inverse synthetic aperture radar imaging parameter design method

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[0117] This part uses the actual ISAR system to test the imaging of the International Space Station (ISS) to verify the validity of the system parameter design method proposed by the present invention. First, according to the input parameter table provided in Table 1 and the orbital information of the International Space Station announced by the North American Aerospace Defense Command, according to the method proposed by the present invention, the parameters required for ISAR imaging are calculated, and the results are shown in Table 2. Then set the radar antenna mechanical scanning and electrical scanning angles according to the obtained parameters, set the ISAR system working status and imaging time, and estimate the expected imaging results. Finally, when the International Space Station passes through the area covered by the radar beam, it starts imaging and obtains the final test ISAR image.

[0118] Table 1 Input parameter table in the embodiment

[0119]

[0120] At...

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Abstract

The invention discloses a space target inverse synthetic aperture radar imaging parameter design method. The method comprises the following steps: a target running track and zenith-passing time are calculated; imaging center time is set; an azimuth angle, an elevation angle, imaging on and off time and a target slope distance are calculated; a redundant slope distance and an initial transmitting pulse width are set; a PRF is selected; whether Dc exceeds an upper limit is judged; an echo window length and Dr are calculated; whether the Dr exceeds the storage and transmission capability is judged; the echo starting time is calculated; beam pointing is adjusted; antenna gains and echo signal intensity are calculated; MGC is set; and imaging is carried out. The motion characteristics of the to-be-imaged space target and the limitations of the radar system are thoroughly considered, STK software is combined, the problems of insufficient calculation precision of target motion parameters, radar beam pointing and system parameters in the traditional space target inverse synthetic aperture radar imaging parameter design are solved, and through a mode of combining mechanical scanning and electric scanning, the beam pointing needed for space target inverse synthetic aperture radar imaging is realized, and the realization cost and the complexity are reduced.

Description

technical field [0001] The invention relates to a method for designing space target inverse synthetic aperture radar imaging parameters, which is a radar system parameter design for high-resolution imaging of space targets through ground-based inverse synthetic aperture radar, and belongs to the technical field of radar system design. The space target includes Satellites, space stations, spacecraft and rocket terminals, etc. Background technique [0002] Since the former Soviet Union successfully launched the first artificial earth satellite on October 4, 1957, the world's aerospace technology has developed vigorously, extending the scope of human activities to outer space, greatly expanding human horizons, and giving birth to satellite navigation, A series of aerospace applications, such as communication and broadcasting, have profoundly changed the way of life of human beings. With the development of aerospace technology, humans have launched a large number of spacecraft ...

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Application Information

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IPC IPC(8): G01S13/90
CPCG01S13/904G01S13/9064
Inventor 韩晓磊张庆君赵良波刘杰齐亚琳赵峭
Owner BEIJING INST OF SPACECRAFT SYST ENG
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