Evaporation waveguide correction model suitable for stable conditions

A stable condition, evaporation waveguide technology, applied in CAD numerical modeling, special data processing applications, complex mathematical operations, etc., can solve problems such as large prediction errors, model errors, etc., achieve high prediction effects, and offshore evaporation waveguide model results are reasonable believable effect

Active Publication Date: 2021-11-05
中国人民解放军92493部队试验训练总体研究所
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  • Description
  • Claims
  • Application Information

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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-s

Method used

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  • Evaporation waveguide correction model suitable for stable conditions
  • Evaporation waveguide correction model suitable for stable conditions
  • Evaporation waveguide correction model suitable for stable conditions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The sea surface temperature is 25°C, the relative humidity is 80%, the air-sea temperature difference is 0-3°C, and the wind speed is 1-16m / s. The results of the NPS model and the corrected evaporation waveguide model are used, as shown in the attached figure 2 shown.

[0043] from figure 2 It can be seen from the above results that under stable conditions, the NPS results will have abnormally large evaporation waveguide heights, such as under the conditions of small wind speeds of 1m / s and 4m / s. However, it is generally believed that the height of the evaporation waveguide is generally within 0-40m, and under the same input conditions, although the result of the revised model will exceed 40m, it is still improved compared with the NPS model and is relatively more reasonable.

Embodiment 2

[0045] The simulation input seawater surface temperature is 15°C, relative humidity is 80%, air-sea temperature difference is 0-3°C, and wind speed is 1-16m / s. The NPS model and the corrected evaporation waveguide model results are used, as shown in the attached image 3 shown.

[0046] from image 3 It can be seen from the above results that under stable conditions, the NPS results will have abnormally large evaporation waveguide heights, such as wind speeds of 1m / s and small wind speeds of 4m / s (air-sea temperature difference of about 2°C), while the same input conditions In this case, it is relatively more reasonable to adopt the corrected model and the result is within 0-40m.

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Abstract

The invention provides the evaporation waveguide correction model suitable for the stable condition, and the correction model improves the overall performance of the evaporation waveguide model by improving the prediction precision of the evaporation waveguide under the marine stable condition. According to the method, a new pervasive function is introduced into an evaporation waveguide model, a wind speed pervasive function in a momentum flux relation under a stable condition in an existing evaporation waveguide model is corrected, and temperature and specific humidity pervasive functions in a sensible heat and latent heat flux relation under the stable condition in the existing evaporation waveguide model are corrected; under the unstable condition, wind speed, temperature and specific humidity pervasive functions in the flux relation confirmed by marine 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...

Claims

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Application Information

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IPC IPC(8): G06F30/20G06F17/15G06F111/10G06F119/08
CPCG06F30/20G06F17/15G06F2111/10G06F2119/08
Inventor 王娜金振中张炳文岳明桥周玢孙秉志朱麟王红光张利军慈旋杨继坤刘成章晗寇雨筱隋景辉
Owner 中国人民解放军92493部队试验训练总体研究所
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