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Inversion method for microphysical parameters of liquid cloud

A physical parameter and inversion technology, applied in the direction of reflection/re-radiation of radio waves, use of re-radiation, measurement devices, etc., can solve the problem of less research on cloud inversion methods, and achieve the effect of improving accuracy

Inactive Publication Date: 2017-05-10
SHANGHAI RADIO EQUIP RES INST
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Problems solved by technology

Among the relevant patents retrieved, the related research at home and abroad mainly focuses on cloud detection equipment or instruments. Departments and units have proposed multi-source data fusion processing methods, and there are few studies on cloud inversion methods.

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  • Inversion method for microphysical parameters of liquid cloud
  • Inversion method for microphysical parameters of liquid cloud
  • Inversion method for microphysical parameters of liquid cloud

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Embodiment Construction

[0053] The present invention will be further elaborated below by describing a preferred specific embodiment in detail in conjunction with the accompanying drawings.

[0054] The millimeter-wave cloud radar uses the scattering characteristics of cloud particles on electromagnetic waves, and understands the macro and micro characteristics of clouds through radar echo analysis of clouds. It can detect particles from a few microns in diameter to weak precipitation particles, and continuously detect the vertical profile of clouds. The echo intensity reflects the size and concentration of particles in the cloud, and the temporal and spatial changes of the echo intensity reflect the evolution characteristics of cloud microphysical processes. By preprocessing the reflectivity factors measured by the radar, the continuous and effective profile and profile echo data and their error information in the cloudy area can be obtained.

[0055] like figure 1 As shown, an inversion method of l...

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Abstract

The invention discloses an inversion method for microphysical parameters of liquid cloud. The inversion method mainly includes the following process: according to radar reflectivity factors provided by a millimeter waves cloud radar, based on the optimal estimation theory, adopting an empirical formula calculation value as a prior value, assuming that particle spectrum submits to logarithmic normal distribution, a function relationship of radar reflectivity factors and liquid cloud physical parameters is established, and the inversion optimal solution is obtained in a condition when the difference value weighing of to-be-inverted parameters, the prior value, the radar reflectivity factors and function calculation value achieves the minimum value. Besides, according to an error transmission theory, uncertainty of liquid cloud microphysical parameters is calculated. The invention can make up a shortcoming of poor adaptability of a traditional empirical formula. Also, besides, common cloud particle diameter and cloud water content, particle concentration and distribution width can also be obtained; the inversion result is more comprehensive. Since the radar reflectivity factor in real time monitoring is adopted for prior value calculation, the inversion result accuracy is improved.

Description

technical field [0001] The invention relates to a method for retrieving microphysical parameters of liquid clouds using reflectivity factors acquired by millimeter-wave cloud radar, in particular to a method for retrieving microphysical parameters of liquid clouds combined with optimal estimation theory and empirical formulas. Background technique [0002] The global distribution of clouds and their microphysical structures affect global climate and environmental changes, and play an important role in regulating the radiation balance and water vapor cycle of the Earth-atmosphere system. By observing the characteristics of global clouds, the vertical distribution from thin clouds to thick clouds is obtained. Profile characteristics, inversion to measure cloud water content, cloud particle size and other parameters are of great significance to climate research, refined weather process analysis, weather prediction, and artificial weather modification. [0003] With the rapid de...

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Application Information

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IPC IPC(8): G01S13/95G01S7/41
CPCG01S7/411G01S7/418G01S13/958Y02A90/10
Inventor 丁霞王海涛王彪
Owner SHANGHAI RADIO EQUIP RES INST
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