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 (ob_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 
15    integer :: n, k
16 
17    if (iv%num_GPSRef < 1) return
18    
19    do n=1, iv%num_GPSRef
20       do k=1, iv%gpsref(n)%info%levels
21          if (iv%GPSRef(n)%ref(k)%qc < obs_qc_pointer) then
22             re%GPSRef(n)%ref(k) = 0.0
23          end if
24          jo_grad_y%GPSRef(n)%ref(k) = -re%GPSRef(n)%ref(k) / &
25                                    (iv%GPSRef(n)%ref(k)%error * &
26                                      iv%GPSRef(n)%ref(k)%error)
27       end do
28    end do
29 
30 end subroutine da_calculate_grady_gpsref
31 
32