基于原位探测的高空气球风场数据修正方法

Correction Method of High-altitude BalloonWind Field Data Based on ISD

对目前高空气球领域所出现的风场数据使用情况进行了研究,针对其存在时效性与针对性不强以及对针对特定区域精度不足、数据密度稀疏等问题,通过对原位探测技术(ISD)的研究,构建了高空气球飞行试验领域的风场误差数据修正模型,提出了一种基于原位探测的高空球风场数据修正方法;该方法通过原位探测手段获取高空气球执行飞行试验任务时所需特定区域的风场数据,从而对模式风预报产品进行修正,在高空气球飞行实验区域内提高了风场数据的准确度;使修正后的风场数据的准确度得到了提高;并最终使用中国某地区的风场数据先后进行仿真试验及实际飞行试验,仿真结果表明,ISD可有效降低模式风预测风速的平均相对误差;在实际飞行实验中,u风误差由模式风预报的2.418 m/s变为ISD模型的1.403 m/s,降低了41.98%;v风误差由模式风预报的0.801 m/s变为ISD模型的0.519 m/s,降低了35.21%,从而,有效地提高了模式风预报的准确性。

Current wind field data in the field of high-altitude balloons has been studied.In view of the problems ofweak timeliness and pertinence,insufficient accuracy for specific areas,and sparse data density,by the in-situ detection(ISD)technology,a wind field error data correction model in the field of high-altitude balloon flight test is built,a high-altitude balloon wind field data correction method based on the in-situ detection is proposed.The method obtains the wind field data of a specific area required by the high-altitude balloon,performs the flight test mission by means of in-situ detection,corrects the model wind forecast product,and improves the accuracy of the wind field data in the high-altitude balloon flight test area.The accuracy of the corrected wind field data is improved.Finally,the wind field data in a certain region of China is used to successively carry outthe simulation test and actual flight test.The simulation results show that the ISD can effectively reduce the average relative error of the predicted wind speed of the model wind;The u wind errorchangesfrom 2.418m/s of the model windforecast to 1.403 m/s of the ISD model,reaches a decrease of 41.98%;The v wind error changesfrom 0.801 m/s of the model wind forecast to 0.519 m/s of the ISD model,andreaches a decrease of 35.21%,which effectively improvesthe accuracy the model windforecast.