ufo_gnssgb_refropp1d_mod_stub.F90

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! (C) Copyright 2017-2018 UCAR
! 
! This software is licensed under the terms of the Apache Licence Version 2.0
! which can be obtained at http://www.apache.org/licenses/LICENSE-2.0. 
 
!>Stubbed Fortran module for ground based gnss ropp1d forward operator
!> following the ROPP (2018 Aug) implementation
 
module ufo_gnssgb_refropp1d_mod
 
use iso_c_binding
use kinds
use ufo_vars_mod
use ufo_geovals_mod
use ufo_geovals_mod_c, only: ufo_geovals_registry
use ufo_basis_mod,     only: ufo_basis
use vert_interp_mod
use lag_interp_mod,    only: lag_interp_const, lag_interp_smthweights
use obsspace_mod   
use missing_values_mod
use fckit_log_module,  only : fckit_log
 
implicit none
public             :: ufo_gnssgb_refropp1d
private
 
  !> Fortran derived type for ground based gnss trajectory
type, extends(ufo_basis) :: ufo_gnssgb_refropp1d
  contains
    procedure :: simobs    => ufo_gnssgb_refropp1d_simobs
end type ufo_gnssgb_refropp1d
 
contains
 
! ------------------------------------------------------------------------------
! ------------------------------------------------------------------------------
subroutine ufo_gnssgb_refropp1d_simobs(self, geovals, hofx, obss)
 
  implicit none
  class(ufo_gnssgb_refropp1d), intent(in)    :: self
  type(ufo_geovals),           intent(in)    :: geovals
  real(kind_real),             intent(inout) :: hofx(:)
  type(c_ptr), value,          intent(in)    :: obss
  real(c_double)                             :: missing
 
  character(len=*), parameter  :: myname_="ufo_gnssgb_refropp1d_simobs"
  integer, parameter           :: max_string = 800
 
  character(max_string)              :: err_msg
  integer                            :: nlev, nobs, iobs,nvprof, obss_nobs
  type(ufo_geoval), pointer          :: t, q, prs, gph, gph_sfc
  real(kind_real), allocatable       :: obslat(:), obslon(:)
 
  write(err_msg,*) "TRACE: ufo_gnssgb_refropp1d_simobs_stub: begin"
  call fckit_log%info(err_msg)
 
! check if nobs is consistent in geovals & hofx
  if (geovals%nlocs /= size(hofx)) then
      write(err_msg,*) myname_, ' error: nlocs inconsistent!'
      call abor1_ftn(err_msg)
  endif
 
! get variables from geovals
  call ufo_geovals_get_var(geovals, var_ts,    t)         ! temperature
  call ufo_geovals_get_var(geovals, var_q,     q)         ! specific humidity
  call ufo_geovals_get_var(geovals, var_prs,   prs)       ! pressure
  call ufo_geovals_get_var(geovals, var_z,     gph)       ! geopotential height
  call ufo_geovals_get_var(geovals, var_sfc_geomz, gph_sfc)   ! surface geopotential height
 
  missing = missing_value(missing)
 
  nlev  = t%nval ! number of model levels
  nobs  = obsspace_get_nlocs(obss)
 
! initialize HofX in the stub
  hofx(:) = missing
 
! set obs space struture
  allocate(obslon(nobs))
  allocate(obslat(nobs))
 
  call obsspace_get_db(obss, "MetaData", "longitude",        obslon) 
  call obsspace_get_db(obss, "MetaData", "latitude",         obslat) 
 
  deallocate(obslat) 
  deallocate(obslon)
 
  write(err_msg,*) "TRACE: ufo_gnssgb_refropp1d_simobs_stub: completed"
  call fckit_log%info(err_msg)
 
end subroutine ufo_gnssgb_refropp1d_simobs
! ------------------------------------------------------------------------------
 
end module ufo_gnssgb_refropp1d_mod