蒸发波导探测系统传感器允许误差分析

Analysis of Permissible Sensor Errors for Evaporation Duct Detection System

基于自主开发蒸发波导诊断分析模型,开展了蒸发波导高度敏感性数值试验研究,发现在几乎所有层结条件下,海面相对湿度是影响蒸发波导高度变化的最敏感因子,其次是海面气温、海表面水温和海面风速,气压变化影响可忽略不计。若使蒸发波导高度诊断分析均方差小于或接近于蒸发波导高度10%,则在稳定层结下要求气温和海表面水温误差不大于0.2℃、相对湿度误差不大于1%、海面风速误差不大于0.5 m/s,在不稳定和中性层结下要求气温和海表面水温误差不大于0.5℃、相对湿度误差不大于3%、低风速时风速误差不大于0.5 m/s、高风速时风速误差不大于1.0 m/s。

Based on the evaporation duct model developed by the authors, numerical sensitivity experiments of evaporation duct were studied. It was found that the surface air relative humidity is the most sensitive factor influencing evaporation duct height for almost all stability conditions. The second sensitive factors are the surface air temperature, the sea surface temperature, and the surface wind speed. The contribution of surface air pressure perturbation can be neglected. In order to make the root mean square of the diagnosed height error of evaporation duct less than or greater than but near the 10% of the evaporation duct height, it is required that the surface air temperature error and the sea surface temperature error are not greater than 0.2 ℃, respectively, the relative humidity error is not greater than 1%, and the sea surface wind speed error is not greater than 0.5 rrds in stable condition, but the surface air temperature error and the sea surface temperature error are not greater than 0.5 ℃, respectively, the relative humidity error is not greater than 3%, and the sea surface wind speed error is not greater than 0.5 m/s for slow wind speed, and not greater than 1.0 m/s for high wind speed in unstable and neutral conditions.