A Correction Method for Evaporation Waveguide Applicable to Stable Conditions

Abstract

The invention provides an evaporation waveguide correction model suitable for stable conditions. The correction model improves the overall performance of the evaporation waveguide model by improving the prediction accuracy of the evaporation waveguide under the stable condition at sea. The present invention introduces a new universal function into the evaporation waveguide model, corrects the wind speed universal function in the momentum-flux relationship under stable conditions in the existing evaporation waveguide model, and corrects the sensible heat and latent heat under stable conditions in the existing evaporation waveguide model The universal functions of temperature and specific humidity in the flux relationship; under unstable conditions, the universal functions of wind speed, temperature and specific humidity in the flux relationship confirmed by sea test data are used.

Description

technical field [0001] The invention relates to an evaporation waveguide in the field of radio meteorology, in particular to a model for predicting parameters of an evaporation waveguide based on sea surface hydrometeorological parameters, which is mainly used for evaluation of the over-the-horizon performance of a microwave band radio system near the sea surface. Background technique [0002] Atmospheric waveguide is an abnormal refraction structure that occurs in the tropospheric atmosphere, which can change the normal propagation characteristics of electromagnetic waves and greatly affect the performance of electronic equipment such as radar, communication, and electronic countermeasures working in the marine environment, especially enabling radar to achieve ultra- line-of-sight detection, etc. [0003] 1) Atmospheric waveguides are divided into evaporation waveguides, surface waveguides and suspended waveguides. Among them, the evaporation waveguide is formed due to the...

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Problems solved by technology

Among the existing models, the Jeskes model, the Paulus-Jeskes model, the MGB model and the pseudo-refractive index model and other evaporation waveguide models are constructed directly from the universal function established by the land test data, and there are model errors under both stable and unstable conditions Larger case

The BYC model and the NPS model are obtained based on the air-sea coupled response test data in tropical seas. Since the air-sea coupled response test is located in tropical seas, most of them are under unstable conditions, it can ensure that the NPS model performs well under unstable conditions. Under stable conditions, the universal function established by land test data is still used when building the model, which may lead to large prediction errors

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