dset /cpc/home/wd52vk/samer/circulation/v850-SA-y1948-may2015 title R1 850-hPa meridional wind (m/s) undef -999. missing_value xdef 29 linear -90. 2.5 ydef 29 linear -55. 2.5 zdef 1 linear 0 1 tdef 24623 linear 1jan1948 1dy vars 1 v850 0 99 R1 850-hPa meridional wind (m/s) endvars