Keywords: class

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## Continuum drift description (for drifts)

      ! DRIFT: Continuum drift description (for drifts).
      integer(kind=4), parameter :: class_sec_dri_id=-10
      integer(kind=4), parameter :: class_sec_dri_len=16
      type drift
         sequence
         real(kind=8)    :: freq    ! [ MHz] Rest frequency
         real(kind=4)    :: width   ! [ MHz] Bandwidth
         integer(kind=4) :: npoin   ! [    ] Number of data points
         real(kind=4)    :: rpoin   ! [    ] Reference point
         real(kind=4)    :: tref    ! [   ?] Time at reference
         real(kind=4)    :: aref    ! [ rad] Angular offset at ref.
         real(kind=4)    :: apos    ! [ rad] Position angle of drift
         real(kind=4)    :: tres    ! [   ?] Time resolution
         real(kind=4)    :: ares    ! [ rad] Angular resolution
         real(kind=4)    :: bad     ! [    ] Blanking value
         integer(kind=4) :: ctype   ! [code] Type of offsets
         real(kind=8)    :: cimag   ! [ MHz] Image frequency
         real(kind=4)    :: colla   ! [   ?] Collimation error Az
         real(kind=4)    :: colle   ! [   ?] Collimation error El
      end type drift