data source:1.cma hdf5;2.geocat netcdf4;3.jaxa netcdf4;4.ncep bufr
2
nscan
3000
area information for geocat netcdf4 data: lonstart latstart nlongitude nlatitude 
1,1,1500,1000
date infomation for cma hdf5 data
2016,07,18,19,00,00
