Research On Recognition Technology Of Tropopause Turbulence Area Based On Satellite Data

Clear air turbulence has always been a hot and difficult point in the field of civil aviation.Especially in the cruise stage,it is not easy to observe,whi ch brings great loss to civil aviation.In this paper,the recognition method of aircraft turbulence region when tropopause is folded is studied by using the dat a of atmospheric water vapor detected by domestic FY satellite.Make full use of the characteristics of satellite remote sensing data,such as fast update spee d(30 minutes)and high accuracy,to provide faster and more accurate early w arning and prediction products for domestic flights.The specific research conte nts are as follows:In this paper,the remote sensing data of water vapor in the 6.7μm chan nel of FY-2F satellite in China are first retrieved as the atmospheric specific h umidity with good conservation.According to the characteristics of the tropopa use fold boundary corresponding to the large gradient region of the satellite wa ter vapor channel data,the method of cube interpolation is used to grid the da ta with equal latitude and longitude,the image is smoothed by Gaussian filter,and the image boundary is extracted by Canny operator.Then by comparing t he height of the climate tropopause with the folding boundary of tropopause,t he false boundary is eliminated and the folding boundary of tropopause is opti mized.Finally,the process of two times of no season,time and position turbul ence is analyzed by using the obtained algorithm.The results show that there is a turbulence region in the region where tro popause folding occurs,and the recognized tropopause folding boundary corresp onds well with the aircraft position information.The recognition algorithm can well detect that the aircraft passes through the boundary with larger specific hu midity gradient,encounters turbulence accompanied by the tropopause folding b oundary,and the aircraft bumps.From the actual case,the turbulence area iden tification technology based on the satellite water vapor channel data can provide half an hour early warning for China’s civil aviation airliners,with an accura cy of 0.1°×0.1°.It can provide strong support for the operation of airlines and the auxiliary decision-making of pilots.