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Multi-satellite fusion precipitation method and system

A technology of satellite and variance, applied in the field of multi-satellite fusion precipitation method and system, to achieve the effect of eliminating errors and accurate precipitation results

Active Publication Date: 2019-10-18
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Based on this, it is necessary to provide a multi-satellite fusion precipitation method and system for the problem of different satellite fusion weights in multi-satellite fusion precipitation

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  • Multi-satellite fusion precipitation method and system
  • Multi-satellite fusion precipitation method and system

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Embodiment Construction

[0081] In order to make the object, technical solution and advantages of the present invention clearer, the multi-satellite fusion precipitation method and system of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0082] figure 1 It is a schematic flow chart of the multi-satellite fusion precipitation method in one embodiment, such as figure 1 The multi-satellite fusion precipitation method in one embodiment shown includes:

[0083] In step S10000, a sampling period is obtained, and the sampling period includes a preset period in each of N years, and the duration of each preset period is less than one year, where N is a positive integer.

[0084] Specifically, N is a positive integer. The method of multi-satellite fusion precipitation can be us...

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Abstract

The invention provides a multi-satellite fusion rainfall method and system, and the method comprises the steps: obtaining a sampling time period, wherein the sampling time period comprises preset timeperiods of N years, and the duration of each preset time period is less than one year; respectively obtaining the ground rainfall data and the rainfall data of at least two satellites in the samplingtime period; determining the prior probability of each satellite; and calculating the multi-satellite fusion rainfall parameters through a probability statistical model according to the prior probability of each satellite, the ground rainfall data and the rainfall data of each satellite. According to the invention, the method obtains different calculation results of the fusion weight coefficientsof all satellites because of the different sampling periods and different ground stations, removes the errors, caused by the different monitoring moments or spaces, of each satellite to maximum degree, and enables a fusion rainfall result to be more accurate.

Description

technical field [0001] The invention relates to the technical field of satellite fusion precipitation, in particular to a multi-satellite fusion precipitation method and system. Background technique [0002] Precipitation is one of the most critical input parameters for uncertainties in atmospheric hydrological models, and it is also a core component of the global water and energy cycle. In traditional technology, there are three main ways to obtain precipitation data. The first is ground station observations. The results of local point sampling observations represent the real precipitation within tens or even hundreds of square kilometers around. At present, the precipitation data of ground stations are considered to be the most reliable precipitation observation data, but there are obvious discontinuities in the temporal and spatial distribution of the observational data of ground stations, and it is difficult to reflect the significant temporal and spatial variability of...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01W1/14
Inventor 马颖钊洪阳杨媛
Owner TSINGHUA UNIV