GRIB数据及其在航迹预测中的应用

摘要

The accuracy of 4 D trajectory prediction is the foundation of trajectory-based operation and de-cision support tools of ATC .Meteorological modeling ,especially the wind modeling ,is the key element for improving the precision of trajectory prediction .Through analyzing the wind data in GRIB format , wind speed and direction at each levels can be obtained .Meanwhile ,the 4 D trajectory prediction model is con-structed based on the wind effect to aircraft movements ,especially Ground Speed and Heading of aircraft . Taking arrival flights to Shanghai Pudong International Airport as an example ,a simulation is conducted through the comparison of prediction results and the radar information .And the simulation results indicate the effectiveness of the proposed approach .%四维航迹预测的准确性是轨迹运行与空管决策支持的基础，而高空风数据支持下的气象建模是提高航迹预测准确性的关键。通过解析GRIB格式的风数据，获取各高度层的风速和风向，同时依据风对地速、航向的影响进行四维航迹预测建模，利用浦东机场的进场航班实现仿真验证，将预测结果与实际雷达轨迹对比，验证了风影响下四维航迹预测的准确性。