da_calculate_grady_ssmt2.inc

1 subroutine da_calculate_grady_ssmt2(iv, re, jo_grad_y)
2 
3    !-------------------------------------------------------------------------
4    ! Purpose: Applies obs inverse on re-vector
5    !-------------------------------------------------------------------------
6 
7    implicit none
8 
9    type (ob_type), intent(in)   :: iv          ! Innovation vector.
10    type (y_type), intent(inout) :: re          ! Residual vector.
11    type (y_type), intent(inout) :: jo_grad_y   ! Grad_y(Jo)
12 
13    integer                      :: n, k
14 
15    if (iv%num_ssmt2 > 0) then  
16       do n=1, iv%num_ssmt2
17          do k=1, iv%ssmt2(n)%info%levels
18             if (iv%ssmt2(n)%rh(k)%qc < obs_qc_pointer) re%ssmt2(n)%rh(k) = 0.0
19 
20             jo_grad_y%ssmt2(n)%rh(k) = -re%ssmt2(n)%rh(k) / &
21                                       (iv%ssmt2(n)%rh(k)%error * &
22                                         iv%ssmt2(n)%rh(k)%error)
23 
24          end do
25       end do
26    end if
27 
28 end subroutine da_calculate_grady_ssmt2
29 
30