Ground site and remote sensing observation rainfall data fusion method and device

A technology of ground station and data fusion, applied in the field of geographic information, which can solve the problems of uneven distribution, low station density, and narrow observation coverage.

Active Publication Date: 2021-08-06
GUANGZHOU INST OF GEOGRAPHY GUANGDONG ACAD OF SCI +1
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Problems solved by technology

For a long time, remote sensing precipitation data are mainly obtained by arranging rain gauges at ground meteorological observation stations. The data collected in this way has excellent accuracy and high observation time resolution, but it also suffers from low station density, uneven distribution and narrow observation coverage. Not enough

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  • Ground site and remote sensing observation rainfall data fusion method and device
  • Ground site and remote sensing observation rainfall data fusion method and device
  • Ground site and remote sensing observation rainfall data fusion method and device

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[0039] In order to make the purpose, technical solution and advantages of the present application clearer, the embodiments of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0040] It should be clear that the described embodiments are only some of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the embodiments of the present application, all other examples obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the embodiments of the present application.

[0041]The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present application. The singular forms "a", "said" and "the" used in the embodiments of this application and the appended claims are also intended to include plur...

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Abstract

The invention relates to a ground site and remote sensing observation rainfall data fusion method and device, and the method comprises the steps: carrying out the spatial downscaling of remote sensing rainfall data of a first resolution through employing a surface-to-point Kriging interpolation method, and obtaining a remote sensing rainfall downscaling result of a second resolution; and constructing and training a space-time fusion model for expressing the space-time heterogeneity relationship between the precipitation amount and the auxiliary parameter for the remote sensing precipitation downscaling result of the second resolution ratio, the auxiliary parameter and the ground station precipitation measured data based on two methods of space-time geographically weighted regression and space-time Kriging interpolation. The error correction of the remote sensing precipitation downscaling result is realized by adding the precipitation trend estimated value of the second resolution output by the space-time fusion model and the residual error estimated value of the second resolution, and a high-precision precipitation data product of the second resolution is obtained. The rainfall data product can be applied to frontier studies such as hydrological simulation, climate change, meteorological disasters and the like.

Description

technical field [0001] The invention relates to the technical field of geographic information, in particular to a method and device for fusing ground station and remote sensing observation precipitation data. Background technique [0002] Precipitation is a key parameter reflecting the state of the surface environment and the global water cycle, and is the basic output flux of atmospheric processes and the basic driving factor of surface hydrological processes. For a long time, remote sensing precipitation data are mainly obtained by arranging rain gauges at ground meteorological observation stations. The data collected in this way has excellent accuracy and high observation time resolution, but it also suffers from low station density, uneven distribution and narrow observation coverage. Waiting is not enough. Especially in areas with complex terrain or underdeveloped areas (such as mountainous areas and western regions), the distribution of meteorological stations is spar...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/27G06F113/08
CPCG06F30/27G06F2113/08Y02A90/10
Inventor 胡泓达许剑辉邓应彬杨骥钟凯文刘旭拢
Owner GUANGZHOU INST OF GEOGRAPHY GUANGDONG ACAD OF SCI
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