Model output file format:
Year DOY Hour Min Sec Lat [deg] Lon[deg] Height[km] Un[m/s] Vn[m/s] Wn[ms]
Here Un[m/s], Vn[m/s], and Wn[m/s] are zonal, meridional , and vertical winds, respectively.
Un is positive eastwards, Vn is positive northwards, and Wn is positive upwards.
