Method for determining spectral distribution of large cloud particles of water cloud

A large particle and spectral distribution technology, applied in the field of remote sensing, can solve the problems of poor inversion accuracy and low calculation efficiency, and achieve the effect of improving spatial resolution, high calculation efficiency, and reducing the area of ​​inversion units

Active Publication Date: 2017-05-17
INST OF REMOTE SENSING & DIGITAL EARTH CHINESE ACADEMY OF SCI
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Problems solved by technology

[0004] The invention proposes a method for determining the particle spectrum distribution of large-particle water clouds, which solves the problems of poor inversion accuracy and low calculation efficiency of water cloud particles with large effective radii

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  • Method for determining spectral distribution of large cloud particles of water cloud
  • Method for determining spectral distribution of large cloud particles of water cloud
  • Method for determining spectral distribution of large cloud particles of water cloud

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[0020] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in conjunction with specific embodiments of the present application and corresponding drawings. Apparently, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0021] The technical solutions provided by various embodiments of the present application will be described in detail below in conjunction with the accompanying drawings.

[0022] figure 1 It is a schematic diagram of the variation of the polarized reflectance of water cloud particles with scattering angle, effective radius of water cloud particles, ...

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Abstract

The invention discloses a method for determining spectral distribution of large cloud particles of a water cloud, and solves the problems of poor inversion accuracy and low calculation efficiency. The method comprises the following steps: calculating a polarization reflectance look-up table, wherein the polarization reflectance look-up table contains polarization reflectance theoretical vectors; calculating a scattering angle of a pixel and a corresponding polarization reflectance observation value from satellite observation data; setting a space inversion resolution, and drawing the polarization reflectance values of which the corresponding scattering angles are within the range of 130-150 degrees to form observation vectors; with respect to effective radii of different cloud particles and effective variance discrete values of the cloud particles, performing curve fitting on the theoretical vectors to obtain a plurality of theoretical curves; performing curve fitting on the observation vectors to obtain an observation curve; and comparing the theoretical curves with the observation curve to obtain the theoretical curve most similar to the observation curve. The method disclosed by the invention has the advantages of high calculation efficiency, high calculation accuracy and small inversion unit area.

Description

technical field [0001] This application relates to the field of remote sensing, in particular to a method for inversion of cloud particle spectrum distribution in water clouds. Background technique [0002] About 20%-30% of the earth's surface is covered by water clouds. The optical and microphysical parameters of water clouds obtained through satellite data retrieval are widely used in climate change, remote sensing monitoring, weather forecasting, model development and other fields. The cloud particle spectrum distribution of water cloud contains two important parameters: cloud droplet effective particle radius and effective variance. The cloud particle spectral distribution inversion multi-angle polarization method can simultaneously obtain cloud particle effective radius and effective variance information. The atmospheric aerosol multi-angle polarization detector (DPC) carried by GF series satellites can provide multi-angle polarization observation data [0003] The tr...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/00G01N15/02
CPCG01N15/02G01N15/0227
Inventor 尚华哲胡斯勒图陈良富安妮马润
Owner INST OF REMOTE SENSING & DIGITAL EARTH CHINESE ACADEMY OF SCI
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