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Tracking-type active radar calibrator based on transmitted signal reestablishing system

A signal reconstruction and tracking technology, applied in the field of microwave remote sensing, to reduce the requirements of the layout site, shorten the calibration test period, and improve the test efficiency.

Active Publication Date: 2013-12-18
NAT SPACE SCI CENT CAS
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Problems solved by technology

[0008] The purpose of the present invention is to solve the specific limitation of the installation position of the above-mentioned direct forwarding type active scaler, and the technical problem that only a fixed delay amount can be provided, resulting in a low success rate of the on-orbit calibration test. Provide a tracking active scaler based on the retransmission signal reconstruction system

Method used

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  • Tracking-type active radar calibrator based on transmitted signal reestablishing system
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  • Tracking-type active radar calibrator based on transmitted signal reestablishing system

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Embodiment Construction

[0041] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, and realized through the following technical solutions.

[0042] Such as figure 1 As shown, the tracking type active scaler based on the retransmission signal reconstruction system of the present invention, the tracking type active scaler includes: sky servo unit, radio frequency receiver, radio frequency transmitter, the tracking type active scaler It also includes a tracker, a signal reconstructor, and a frequency synthesizer, and the said sky servo unit is connected with the radio frequency receiver and the radio frequency transmitter respectively;

[0043] Described tracker is respectively connected with radio frequency receiver, frequency synthesizer and signal rebuilder, and this tracker is used for after the radio frequency signal that radio frequency receiver outputs carries out Fast Fourier transform analysis processing, generates freque...

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Abstract

The invention relates to a tracking-type active radar calibrator based on a transmitted signal reestablishing system. The tracking-type active radar calibrator comprises a servo unit (1), a radio frequency receiver (2) and a radio frequency transmitter (5). The tracking-type active radar calibrator further comprises a tracking device (3), a signal reestablishing device (4) and a frequency synthesizer (6), the tracker (3) is respectively connected with the radio frequency receiver (2), the frequency synthesizer (6) and the signal reestablishing device (4), and the signal reestablishing device (4) is further connected with the frequency synthesizer (6) and the radio frequency emitter (5). The tracking-type active radar calibrator can quickly capture tracking radar signals and reestablish radio frequency signals so as to send the signals to an on-orbit satellite radar, and realize the functions that at any position within the coverage range of the satellite radar signals, the radar signals can be captured and tracked quickly, signal emission time can be accurately set according to received signal intervals, and the radio frequency signals are reestablished to be sent to the radar.

Description

technical field [0001] The invention relates to the technical field of microwave remote sensing, in particular to a tracking type active scaler based on a retransmission signal reconstruction system. Background technique [0002] During the satellite radar’s in-orbit operation, due to factors such as component aging, clock drift, and antenna attitude fluctuations, the system delay and gain of the radar will be affected, resulting in errors in radar earth observation. [0003] In order to ensure the stability, accuracy and reliability of radar observation data during on-orbit operation, it is necessary to perform on-orbit calibration and authenticity inspection of radar to ensure the continuity of radar observation tasks and the consistency of data standards. [0004] Active Calibrator is a radar ground on-orbit calibration device. Provide the radar with a standard known point target echo signal, and the radar corrects the delay measurement and other errors of its own system...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/40
Inventor 王彩云郭伟赵飞刘鹏万珺之何佳宁谌华蔡鹏飞
Owner NAT SPACE SCI CENT CAS
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