module mod_measurement

  integer, parameter, public :: OBSTYPESTRLEN = 5

  type measurement
     real d                       ! Measurement value
     real var                     ! Error variance of measurement
     character(len=OBSTYPESTRLEN) id ! Type, can be one of those:
                                  ! 'SST' 'SLA' 'ICEC' 'SAL' 'TEM'
                                  ! 'GSAL' 'GTEM' 'TSLA'
     real lon                     ! Longitude position
     real lat                     ! Latitude position
     real depth                   ! depths of position 
     integer ipiv                 ! i-pivot point in grid
     integer jpiv                 ! j-pivot point in grid
     integer ns                   ! representativity in mod cells (meas. support)
                                  ! ns=0 means: point measurements
                                  ! used in m_Generate_element_Sij.F90
     real a1                      ! bilinear coefficient (for ni=0)
     real a2                      ! bilinear coefficient
     real a3                      ! bilinear coefficient
     real a4                      ! bilinear coefficient
     logical status               ! active or not
     integer i_orig_grid          ! KAL - orig grid index for ice drift
                                  ! processing
     integer j_orig_grid          ! orig grid index
     real h                       ! PS - layer thickness, sorry for that
     integer date                 ! FanF - age of the data 
     integer orig_id              ! PS - used in superobing
  end type measurement

end module mod_measurement