Rainfall estimation method based on S-band dual-polarization weather radar

Abstract

The invention discloses a rainfall estimation method based on an S-band dual-polarization weather radar, and relates to the field of rainfall estimation. At present, a rainfall estimation method based on a dual-polarization radar mainly establishes a relation method between different combinations based on polarization and a rainfall rate, an hour rain gauge is used for correction, the time scale is large, and the final correction effect is influenced. According to the method, real-time minute rain gauge data within the effective coverage range of the radar is used, double thresholds are adopted during liquid rainfall estimation, different rainfall estimation algorithms are selected for calculation, and real-time calibration and correction are carried out on a body-by-body scanning rainfall rate product of the dual-polarization radar. According to the method, the correction time scale is smaller, the precision of the corrected rain intensity per body product is higher, the hourly precipitation product accumulated by using the corrected rain intensity product is more accurate, and the long-term stability is better.

Description

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AI Technical Summary

Benefits of technology

This patented technology allows us to accurately estimate both the amount of snowfall falling from different directions at various altitudes over an area covered by two types of radio waves called X/R BARS or LASER signals. It uses multiple small antennas placed close together along their edges to measure these signal levels simultaneover. These measurements are then combined into one single measurement that provides precise mass-to-charge ratio values. Based upon these measured quantities, we have developed algorithms to correct errors caused by factors like wind speed variations during cloud formation. Overall, it enhances the precision and reliability of synthetic aperture radars such as Liquatino Radiometer (LRS).

Problems solved by technology

This patents describes various technical problem addressed in this patented technology relating to improving the performance of double-pole radio wave radiospectral radiometers (RSAR). These radomacs measure both high frequency (Hz)-level signals with multiple polarized antennas and low altitude (Low Gravity Horizon or Short Range Metric Hydrography Radiometer Ground Surface Observation System) observations made from spaceborne astronomers. Current solutions involve selecting specific configurations among two polarizable radion counters called bimodal and triofer systems, respectively. Different techniques like complex projection formula algorithms, spectral analysis, and stator interference calculations were developed to improve their precision and efficiency.

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