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 (iv_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 (trace_use_dull) call da_trace_entry("da_calculate_grady_ssmt2")
16 
17    do n=1, iv%info(ssmt2)%nlocal
18       do k=1, iv%info(ssmt2)%levels(n)
19          if (iv%ssmt2(n)%rh(k)%qc < obs_qc_pointer) re%ssmt2(n)%rh(k) = 0.0
20          jo_grad_y%ssmt2(n)%rh(k) = -re%ssmt2(n)%rh(k) / &
21             (iv%ssmt2(n)%rh(k)%error * iv%ssmt2(n)%rh(k)%error)
22       end do
23    end do
24 
25    if (trace_use_dull) call da_trace_exit("da_calculate_grady_ssmt2")
26 
27 end subroutine da_calculate_grady_ssmt2
28 
29