Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Multilayer cloud inversion method for multi-channel scanning imaging radiometer of FengYun 4A meteorological satellite

A meteorological satellite, scanning imaging technology, applied in the field of satellite remote sensing, can solve the problems that it is difficult to quantitatively provide product data and cannot be fully referenced

Active Publication Date: 2019-06-28
NANJING UNIV OF INFORMATION SCI & TECH
View PDF11 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current multi-layer cloud algorithms still have great uncertainty, and it is difficult to provide accurate product data for subsequent quantitative remote sensing
Moreover, due to changes in spectral channels, the development of my country's AGRI / FY-4A cloud products, especially multi-layer cloud products, cannot fully refer to existing mature algorithms

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Multilayer cloud inversion method for multi-channel scanning imaging radiometer of FengYun 4A meteorological satellite
  • Multilayer cloud inversion method for multi-channel scanning imaging radiometer of FengYun 4A meteorological satellite

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0023] (1) Based on the multi-spectral threshold cloud detection algorithm developed by the National Satellite Meteorological Center based on the meteorological satellite wind and cloud 3D (FY-3D) imager MERSI-II, develop and optimize the cloud identification algorithm suitable for AGRI / FY-4A. Using the AGRI / FY-4A data, according to the cloud detection products obtained by the cloud detection algorithm based on multi-spectral threshold, determine the cloudy or clear sky conditions of each pixel, which are divided into four categories: cloudy, likely cloudy, clear sky, and possibly clear sky. AGRI / FY-4A data used in the present invention (such as figure 1 , where Ref(1.6) and Ref(2.25) represent the reflectivity of 1.6 and 2.25 μm channels respectively, BT(8.5) and BT(11) represent the brightness temperature of 8.5 and 11 μm channels respectively, and BTD[8.5-11] represents the 8.5 and 11 μm channels 11 μm channel brightness temperature difference, Lon and Lat represent longitu...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a multilayer cloud inversion method for a multi-channel scanning imaging radiometer of a FengYun 4A meteorological satellite, and fills the blank in the algorithm domestically.Unique design characteristics of a spectral channel of a domestic satellite radiometer (AGRI) are taken into full consideration, a multilayer cloud model is established on theoretical basis of rapidradiation transmission simulation, sensitivity of different short-wave infrared channels (1.6 and 2.25 micron) to different phase clouds is analyzed, and it is discovered for the first time that the two channels can be used to identification of the cloud phase. According to the model, it is provided that penetration of the short-wave infrared channels is high in different cloud optical thicknesses, and lower-layer water cloud information can penetrate the upper layer and extracted by satellite observation. The infrared channels are combined to identify the cloud top phase, and the brand new multilayer cloud (upper ice cloud and lower water cloud) identification algorithm via the radiometer is provided. A multilayer cloud result of the algorithm is verified by using the accurate active spaceborne laser radar CALIOP, and is highly accurate. The unique design characteristics of the spectral channel of the domestic imager are fully considered, the method is applied to a new generator of domestic imager AGRI, and can be used to provide more accurate and efficient multilayer cloud detection results for applications in future.

Description

technical field [0001] The invention belongs to the field of satellite remote sensing, in particular to a multi-layer cloud inversion method for a multi-channel scanning imaging radiometer of a Fengyun 4A meteorological satellite. Background technique [0002] At present, almost all inversions of cloud optical and microphysical properties at home and abroad are based on the monolayer cloud assumption, that is, it is assumed that a single layer of clouds has the same physical properties, but there are often multi-layered clouds in the actual atmosphere. The importance of multilayer clouds is not only reflected in its large frequency of occurrence on a global scale, but also affects the inversion effect of cloud characteristics on the incident solar radiation and the earth's emitted radiation. Meteorological satellites have the advantages of crossing national boundaries and global coverage, and are the main method to obtain the global temporal and spatial distribution of cloud...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/17G01N21/3504
Inventor 刘超王健捷姚彬王金虎
Owner NANJING UNIV OF INFORMATION SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com