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Dual-frequency dual-polarization microwave link joint raindrop spectrum inversion and precipitation type recognition method

A microwave link, precipitation type technology, used in rainfall/precipitation meters, measurement devices, meteorology, etc., can solve problems such as low spatial resolution, clutter suppression, and time resolution accuracy that cannot meet actual business requirements. , to achieve high temporal and spatial resolution, improve inversion accuracy, and eliminate the effects of non-rainfall factors

Active Publication Date: 2017-03-29
PLA UNIV OF SCI & TECH
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Problems solved by technology

At present, rain gauges, weather radars and rain measurement satellites are mainly used in meteorological observation services. Rain gauges are more accurate in single-point measurement, but their spatial resolution is low, making it difficult to network in complex areas and increasing costs; weather radars Although the temporal and spatial resolution of rain measurement is high, the accuracy is poor and will be suppressed by clutter; the rain measurement satellite has a large spatial resolution, but its time resolution and accuracy of rain measurement cannot meet the actual business requirements

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  • Dual-frequency dual-polarization microwave link joint raindrop spectrum inversion and precipitation type recognition method
  • Dual-frequency dual-polarization microwave link joint raindrop spectrum inversion and precipitation type recognition method
  • Dual-frequency dual-polarization microwave link joint raindrop spectrum inversion and precipitation type recognition method

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Embodiment Construction

[0031] The present invention uses different frequency bands and different polarization modes of rainfall to have different microwave attenuation information, jointly inverts rainfall information, and calculates information such as raindrop spectrum, rainfall intensity, and raindrop particle type according to scattering theory, mainly including the following steps:

[0032] Step 1: If figure 1 As shown, the microwave transmitter transmits three microwave links along the same path in the case of rain, and the specific transmission conditions are shown in Table 1:

[0033] Table 1

[0034]

[0035] Through the microwave receiver at the other end, the microwave rain-induced attenuation of the three links is measured: Among them, h represents the horizontal polarization of the incident wave, and v represents the vertical polarization of the incident wave.

[0036] Step 2: Perform joint differential processing on the microwave rain-induced attenuation of the three links measur...

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Abstract

The invention relates to a dual-frequency dual-polarization microwave link joint raindrop spectrum inversion and precipitation type recognition method, which comprises the steps of inversing the path average precipitation intensity based on rain attenuation information of a dual-frequency dual-polarization microwave link, firstly measuring rain attenuation intensities of different frequencies and different polarization directions by using a microwave transmitter and a receiver; then inversing path precipitation spectrum parameters by using the attenuation information; and finally calculating the path precipitation intensity by using the spectrum parameters, and performing precipitation recognition. The method provided by the invention fully exploits the microwave rain attenuation information, converts the rain attenuation information into precipitation information by the means of inversion, and has the characteristic of high temporal-spatial resolution. Meanwhile, influences of non precipitation factors are eliminated because of adoption of joint attenuation difference, and the inversion precision is improved. The method can be put into meteorological observation by acting as a new method for precipitation observation.

Description

technical field [0001] The present invention relates to the field of meteorological information processing and application, in particular to the field of processing and application of rain-induced attenuation information based on the microwave transmission process, and more specifically to the field of rain-induced attenuation for dual-frequency, dual-polarization microwave links Inversion of information. Background technique [0002] The real-time and accuracy of rainfall measurement is of great significance to meteorological research, disaster early warning, and military support of troops. At present, rain gauges, weather radars and rain measurement satellites are mainly used in meteorological observation services. Rain gauges are more accurate in single-point measurement, but their spatial resolution is low, making it difficult to network in complex areas and increasing costs; weather radars Although the temporal and spatial resolution of rain measurement is high, its ac...

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Application Information

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IPC IPC(8): G01W1/14
CPCG01W1/14
Inventor 宋堃刘西川高太长薛杨印敏孙梯全
Owner PLA UNIV OF SCI & TECH
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