A Calibration Method of Meteorological Radar Echo Intensity
A technology of echo intensity and weather radar, applied in radio wave measurement systems, instruments, etc., can solve the problems of echo intensity calculation deviation, affecting data accuracy, etc., to achieve the effect of ensuring stability and accuracy
Active Publication Date: 2021-11-23
ANHUI SUN CREATE ELECTRONICS
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[0003] In the prior art, factors that may cause changes in the measured value of the echo intensity include the echo signal power input to the receiver, and the echo signal power input to the receiver is determined according to the characteristic curve input by the receiver and based on a look-up table. The table is obtained through the test signal calibration of the DDS signal generator inside the machine; therefore, when the receiving mode is set incorrectly or the characteristic curve is abnormal, it is easy to cause deviations in the calculation of the echo intensity and affect the accuracy of the data
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[0047] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0048] The weather radar system includes: transmitter, antenna, feeder module, receiver, signal processor, and terminal processing unit; the working principle of the weather radar system is as follows: the transmitter transmits signals through the antenna; the antenna receives the reflected signal, that is, the echo signal Finally, the echo signal is first sent to the receiver through the feeder module, then sent to the signal processor through the receiver, an...
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The invention discloses a calibrating method of meteorological radar echo intensity. Firstly, the system parameter value is measured, and the system parameter value includes the system noise floor and the system gain; Sensitivity; finally, the terminal processing unit calibrates and calculates the intensity of the echo signal, that is, the echo intensity, according to the system signal-to-noise ratio and system sensitivity, and obtains the calibrated echo intensity. The present invention can be aimed at weather radars of various bands and systems, and in the case of unstable receiver gain or loss change, by measuring system parameter values, the echo strength can be calibrated and calculated to obtain the calibrated and corrected echo strength.
Description
technical field [0001] The invention relates to the technical field of weather radar, in particular to a method for calibrating the echo intensity of weather radar. Background technique [0002] In meteorological radar, in order to ensure the stability of the radar’s own working parameters and give more credible result data, it is necessary to monitor the changes in the echo intensity of the radar at any time, and make necessary corrections to the results, which requires the radar system to have the main The function of automatically monitoring the parameters and revising the detection results, this process is the radar echo intensity calibration. Echo intensity calibration is an important means to ensure the accuracy of radar measurement. By measuring the main parameter values monitored by the radar system, the echo intensity calibration is automatically corrected to ensure that the echo intensity measurement value does not vary due to the radar parameters during operatio...
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IPC IPC(8): G01S7/40
CPCG01S7/4004
Inventor 张晓飞姚文洋屈凯峰吴晓燕
Owner ANHUI SUN CREATE ELECTRONICS