!'rams' = rams grid
                    ! 'polar'  = polar sterog. grid output
                    ! 'gg'  = gaussian grid output
                    ! 'll'  = lat/lon grid output
                    ! 'lambert'  = lambert grid output
                    ! 'mercator' = mercator grid output

ihour=00,

 iday=$dd,

imon=04,
iyear=2010,