基于GPS航迹的飞行误差分布规律研究

Research on Regularities of flight track error distribution based on GPS

研究航迹误差分布规律,制定合适的飞行安全间隔标准是提高空域利用率的关键所在。本文针对CESSNA172机载GPS航迹数据对手动飞行条件下的航迹误差分布规律进行了研究。首先通过解析GPS航迹数据,利用Haversine公式对手动飞行条件下的航迹偏差进行统计分析;接下来采用quantile-quantile图检验法对航迹误差数据进行正态分布检验,根据Michael拟合优度检验方法给出正态分布的显著性水平;最后计算得到正态分布总体均值和标准差的置信区间。结果表明,训练飞机下降着陆阶段的实际位置点与跑道中心线的距离偏差符合正态分布规律,为训练飞行中空域规划及飞行安全间隔标准的制定提供了可靠理论依据。

It was held that the key to improve airspace utilization is the establishment of a proper flight safety separation. Based on GPS flight track of CESSNA 172 in manual flight, a research to analyze the regularities of flight track error distribution is proposed. Firstly,calculating the flight track error by Harversine formula, then using the Quantile-Quantile figure method to test the actual position error for normal distribution, and the significant level is confirmed on the basis of test of goodness of fit. At last, calculating the actual error confidence interval of population mean and standard deviation. The results show that the deviated distance between runway central-line and actual positions obeys the normal distribution, which provides the important basis for further in-depth research on the regularities of flight track distribution in low altitude complex training flight, achieving the aim of researching flight safety separation and Conflict risk.