A microwave link raindrop spectrum measurement method based on optimal estimation method

By combining optimal estimation methods with historical data from raindrop spectrometers and microwave link models, the problems of inaccurate measurement and high cost of large-scale near-ground raindrop spectrum information have been solved, achieving low-cost raindrop spectrum monitoring.

CN117420620BActive Publication Date: 2026-07-21NAT UNIV OF DEFENSE TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NAT UNIV OF DEFENSE TECH
Filing Date
2023-09-12
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

Existing technologies are difficult to use for accurate measurement of near-ground raindrop spectral information over a wide range and are costly.

Method used

Based on the optimal estimation method, a forward model is established by building prior information from historical observation data of the raindrop spectrometer and combining multiple microwave links. The rain attenuation rate is extracted, and the optimal value and uncertainty of the raindrop spectral function are calculated based on the observation vector and prior information.

Benefits of technology

It enables low-cost and effective monitoring of near-surface raindrop spectrum information within a regional area, solving the problem of inaccurate measurement of near-surface raindrop spectrum information over a large area.

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Abstract

The application provides a microwave link raindrop spectrum measurement method based on an optimal estimation method, comprising the following steps: establishing prior information based on historical observation data of a raindrop spectrometer; establishing a forward model based on multiple microwave links; extracting rain-induced attenuation rates based on the multiple microwave links; establishing an observation vector according to the rain-induced attenuation rates; and performing optimal estimation on a to-be-measured raindrop spectrum function based on the observation vector, the forward model and the prior information, and calculating a raindrop spectrum function optimal value and a raindrop spectrum function uncertainty. The application solves the problems of inaccurate measurement and high cost of large-scale near-ground raindrop spectrum information measurement in the prior art.
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