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Quality control method for differential phase of dual-polarization meteorological radar

A quality control method and differential phase technology, applied in the field of radar, can solve problems such as reflectivity factor attenuation, and achieve the effect of reducing errors, improving stability and improving accuracy.

Pending Publication Date: 2021-12-10
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

However, due to the influence of other non-precipitation particles in the air and other electromagnetic interference, the reflectivity factor has a certain attenuation

Method used

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  • Quality control method for differential phase of dual-polarization meteorological radar
  • Quality control method for differential phase of dual-polarization meteorological radar
  • Quality control method for differential phase of dual-polarization meteorological radar

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Embodiment Construction

[0059] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0060] The present invention designs a quality control method for the differential phase of a dual-polarization weather radar. The overall process is as follows: figure 1 shown.

[0061] In this embodiment, the data processing is performed on the basis of the measured data of the existing dual-polarization radar system. The software and hardware configurations used in the experiment are shown in Table 1:

[0062] Table 1 Experimental environment

[0063]

[0064] Proceed as follows:

[0065] Step 1. Preprocessing the measured differential phase of the dual-polarization radar, including processing the pockmarked clutter, abrupt noise and banner clutter in the PPI display;

[0066] Step 2, using the differential phase, the relationship between the horizontal reflectivity factor and the differential reflectivity factor, to remove the ba...

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Abstract

The invention discloses a quality control method for a differential phase of a dual-polarization meteorological radar, and the method sequentially comprises the steps: carrying out the preprocessing of a dual-polarization radar actual measurement differential phase; removing a backward differential phase error existing in the actually measured differential phase value by using the relation among the differential phase, the horizontal reflectivity factor and the differential reflectivity factor; carrying out LSTM processing according to the transformation condition of the differential phase in the same radial direction, so that the filtering effect of the differential phase is achieved; traversing dual-polarized radar rays to scan all radial actually measured differential phase values in all directions, and performing LSTM processing; and based on the processed rainfall differential phase value, carrying out attenuation correction of reflectivit by using a reflectivity attenuation correction algorithm. According to the invention, the accuracy problem in reflectivity attenuation correction can be effectively improved, and the stability of attenuation correction is improved.

Description

technical field [0001] The invention belongs to the technical field of radar, and in particular relates to a quality control method of a dual-polarization weather radar differential phase. Background technique [0002] In dual-polarization meteorological radars, high-quality and high-precision reflectivity factors directly determine the radar's ability to estimate precipitation and identify precipitation particle types. However, due to the influence of other non-precipitation particles in the air and other electromagnetic interference, the reflectivity factor has a certain attenuation. The differential phase shift rate obtained from the echo received by the dual-polarization radar is not affected by the energy attenuation of radar electromagnetic waves, and the attenuation correction of the reflectivity factor also mainly depends on the calculation of the differential phase shift rate. The differential phase value obtained by direct measurement of the dual-polarization rada...

Claims

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Application Information

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IPC IPC(8): G01S7/40G01S7/41G01S13/95
CPCG01S7/4052G01S7/417G01S13/95Y02A90/10
Inventor 闫贺徐星周晔汪玲
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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