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TPRF method for avoiding velocity measurement obscureness of Doppler weather radar

A technology of ambiguity of retreat velocity, weather radar, applied in ICT adaptation, climate sustainability, reflection/re-radiation of radio waves, etc., can solve problems such as Doppler weather radar ambiguity

Active Publication Date: 2012-03-21
何平 +1
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Problems solved by technology

The ambiguity problem is especially serious for X-band Doppler weather radars

Method used

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  • TPRF method for avoiding velocity measurement obscureness of Doppler weather radar
  • TPRF method for avoiding velocity measurement obscureness of Doppler weather radar
  • TPRF method for avoiding velocity measurement obscureness of Doppler weather radar

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Embodiment Construction

[0049] TPRF technology has a strong ability to expand the speed measurement range, but to ensure its effectiveness in the detection of strong convective weather, the selected pulse repetition frequency must be limited. The key to the implementation of TPRF technology is to choose three suitable pulse repetition frequencies. Various limitations on the pulse repetition frequency mainly come from the requirements of the detection distance and the influence of the velocity and velocity spectrum width of the meteorological target. Now record the detection distance requirement as R, and the velocity spectrum width as σ v , the horizontal wind is recorded as V h , these three parameters are the main basis for determining the pulse repetition frequency.

[0050] Detection distance requirements limit the highest pulse repetition frequency that can be used. Weather radars in different bands have different requirements for detection distance, so when implementing TPRF technology, the ...

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Abstract

A TPRF method for avoiding velocity measurement obscureness of a Doppler weather radar belongs to the field of weather radars, and aims at solving the problem of velocity measurement obscureness of the Doppler radar. The TPRF method is a special case of multiple-pulse repetition frequency detection technology and is also the development of dipulse repetition frequency (DPRF) detection technology.In TPRF technology, three pulse repetition frequencies forming two DPRF detections are used for detection, and two results detected by the DPRF are analyzed by the DPRF again, thereby expanding a velocity measurement range for twice. The velocity measurement range expanded by the DPRF can not realize the detection without obscureness in weather with strong convection. Under the condition that thedistance of the detection without obscureness is the same, the velocity measurement range of the TPRF is wider than that of the DPRF by two times at least, thereby realizing the detection without obscureness on most weather with strong convection. The key for implementing the TPRF is to choose three suitable pulse repetition frequencies and to provide a method for confirming the three pulse repetition frequencies of the TPRF so as to ensure the effectiveness of the TPRF method.

Description

1. Technical field [0001] The invention belongs to the field of weather radar and is directly used for solving the fuzzy problem of speed measurement of Doppler weather radar. 2. Background technology [0002] Velocity ambiguity is a technical problem that needs to be solved for a long time in Doppler weather radar detection. Because of the contradiction between distance measurement and speed measurement, in order to meet the requirements of a certain detection distance, the speed measurement range is limited, and it is easy to appear speed ambiguity when encountering convective weather. Velocity ambiguities often appear in the velocity products of Doppler weather radar. However, the speed product is very useful for short-term early warning and analysis research, because the speed ambiguity problem makes its application very limited. For a long time, the solution to the speed ambiguity problem is mostly to use after-the-fact software processing. Although these methods can...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/95
CPCY02A90/10
Inventor 何平刘晓阳
Owner 何平
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