da_calculate_grady_gpsref.inc

1 subroutine da_calculate_grady_gpsref(iv, re, jo_grad_y)
2 
3    !----------------------------------------------------------------------
4    ! Purpose: Applies obs inverse on re-vector         
5    !----------------------------------------------------------------------
6 
7    implicit none
8 
9 
10    type (iv_type), intent(in)     :: iv          ! Innovation vector.
11    type (y_type),  intent(inout)  :: re          ! Residual vector.
12    type (y_type),  intent(inout)  :: jo_grad_y   ! Grad_y(Jo)
13 
14    integer :: n, k
15 
16    if (trace_use_dull) call da_trace_entry("da_calculate_grady_gpsref")
17    
18    do n=1, iv%info(gpsref)%nlocal
19       do k=1, iv%info(gpsref)%levels(n)
20          if (iv%gpsref(n)%ref(k)%qc < obs_qc_pointer) then
21             re%gpsref(n)%ref(k) = 0.0
22          end if
23          jo_grad_y%gpsref(n)%ref(k) = -re%gpsref(n)%ref(k) / (iv%gpsref(n)%ref(k)%error * iv%gpsref(n)%ref(k)%error)
24       end do
25    end do
26 
27    if (trace_use_dull) call da_trace_exit("da_calculate_grady_gpsref")
28 
29 end subroutine da_calculate_grady_gpsref
30 
31