An Analysis of Troposcatter Propagation Slant Delay Based on ERA5 Pressure Level Meteorological Data
Aimed at the problem that the current numerical model of tropospheric scattering turbulence fails to effectively reflect the influence of the meteorological environment on tropospheric scattering propa-gation,the fifth-generation global climate reanalysis dataset(ERA5)pressure level meteorological data of the European centre for medium-range weather forecasts(ECMWF)is introduced into the high-precision tropospheric scattering delay calculation model,and 12 scattering links in six typical geographical regions of China,i.e.Tibet Plateau,North China Plain,Sichuan hill,Yunnan-Guizhou mountain,Longmeng desert are selected.The ERA5 hourly data on pressure levels(ERA5 MPL)and ERA5 monthly averaged data on pressure levels(ERA5 MPL)are used to calculate and analyze the trend of tropospheric skew delay of each link in different geographical environments respectively,and simultaneously the results of the cal-culation of the two data sets are compared.The results show that the calculation method of troposcatter propagation slant delay given in this paper is suitable for ERA5 pressure level meteorological data,the maximum standard deviation in the results obtained by the two data sets on different links is 2.9 m,and the timing accuracy difference is less than 10 ns.
troposcatterslant delay3D ray tracingERA5 datasetinterpolation and extrapolation
万方数据
维普
