A system-level test method for radar altimeter

A technology of radar altimeter and test method, which is applied in the direction of radio wave measurement system, instrument, etc., and can solve problems such as inability to obtain measurement results, incomplete working logic, and no algorithm processing

Active Publication Date: 2014-07-09
BEIJING INST OF SPACECRAFT SYST ENG
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  • Abstract
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Problems solved by technology

Therefore, the working logic of the radar altimeter depends on the echo signal processing result. If there is no echo signal, no algorithm processing is performed, and the measurement result cannot be obtained, and its working logic is incomplete.

Method used

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  • A system-level test method for radar altimeter
  • A system-level test method for radar altimeter
  • A system-level test method for radar altimeter

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Experimental program
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Embodiment Construction

[0021] Radar altimeter system-level verification indicators include: height measurement results, wave height measurement results, and system AGC results.

[0022] The method of the invention utilizes the radar altimeter echo simulator to generate the echo analog signal, and sets the echo model, thereby simulating different elevation and wave height information, and utilizes the timing signal output by the radar altimeter to perform the radar altimeter and the echo simulator Simultaneously, the measured response of the radar altimeter is evaluated by varying the input to the radar altimeter by varying the echo model and the power of the simulator output signal. Such as figure 1 Shown, the flow process of the inventive method is as follows:

[0023] (1) The timing output signal of the radar altimeter is connected to the echo simulator, and the output signal of the echo simulator is connected in series with the adjustable attenuator and then input to the radar altimeter; figur...

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Abstract

A radar altimeter system-level testing method, using an echo simulator to form a closed-loop test system, to test the radar altimeter's height measurement function, wave height test function, and system AGC adaptive adjustment function, so as to test the system-level measurement function of the radar altimeter A comprehensive verification is carried out, which solves the system-level verification problem of the spaceborne radar altimeter under the whole star condition. The method of the present invention utilizes the echo simulator to form a closed-loop test system, changes the input of the radar altimeter system through the setting of the echo simulator and the adjustment of the attenuator, and interprets the final test result of the radar altimeter, and the test result reflects the complete working logic of the radar altimeter, achieving The purpose of radar altimeter system level verification.

Description

technical field [0001] The invention relates to a testing method of a radar altimeter. Background technique [0002] Radar altimeter is an active microwave measuring instrument. It uses the orbit of the aircraft as a reference to measure the distance to the earth's surface perpendicular to it. Its basic working principle is that the transmitter transmits radio frequency electromagnetic waves to the measured surface through the antenna, and the antenna receives reflection and scattering. The returned energy is sent to the receiver, and the receiver outputs the signal to the distance measurement system to obtain the time delay of the echo relative to the transmitted signal, and then calculate the height of the measured surface. [0003] A radar altimeter usually consists of a numerical control unit, a receiving unit, a transmitting unit, a power amplifier unit and a microwave front end. The numerical control unit completes the control of other units, and collects the data sen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/40
Inventor 赵利民张英辉张帅王清泉
Owner BEIJING INST OF SPACECRAFT SYST ENG
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