Method of Reconstructing Vertical Rain Field Based on Satellite-Earth Link Scanning

Abstract

The present invention proposes a method for reconstructing the vertical rainfall field based on satellite-ground link scanning. The method constructs multiple satellite signal receiving terminals to receive polar-orbiting satellite signals to form multiple satellite-ground links; the vertical area to be reconstructed is gridded ; Obtain the spatial distribution of the attenuation coefficient by analyzing the relationship between the signal strength information of the satellite-ground link, the rain attenuation coefficient, and the length of the satellite-ground link, and invert the spatial distribution of rainfall according to the relationship model between it and the rainfall intensity, and generate the vertical space The rainfall information is finally combined with the detection area to reconstruct the vertical rainfall field. The invention not only makes up for the shortcomings of traditional methods for detecting vertical rainfall fields, but also has the advantages of high temporal and spatial resolution and low cost, and provides important data support and guarantee for water resource management, agricultural development, and natural disaster early warning.

Description

technical field [0001] The invention relates to the field of meteorological detection, in particular to a method for reconstructing a vertical rain field based on satellite-ground link scanning. Background technique [0002] Monitoring the vertical distribution of rainfall plays an important role in water resources management, agricultural development and natural disasters (debris flow, flood, etc.) early warning. Traditional means of detecting rainfall include rain gauges, weather radar and weather satellites. Among them, rain gauges can only realize rainfall observation in horizontal areas through networking, and it is difficult to deploy and maintain them in inaccessible areas such as deserts and rainforests, which increases operating costs; weather radar can detect rainfall in three-dimensional space, and the temporal and spatial resolution It is relatively high, but it is easily affected by ground clutter at low elevation angles, and it is difficult to measure rainfall...

AI Technical Summary

Problems solved by technology

Among them, rain gauges can only realize rainfall observation in horizontal areas through networking, and it is difficult to deploy and maintain them in inaccessible areas such as deserts and rainforests, which increases operating costs; weather radar can detect rainfall in three-dimensional space, and the temporal and spatial resolution It is relatively high, but it is easily affected by ground clutter at low elevation angles and it is difficult to measure rainfall near the ground; meteorological satellites can observe three-dimensional rainfall on a global scale, because the same area can only be observed twice a day, the time resolution is too high Low can not meet the requirements of real-time monitoring of rainfall

Images