da_calculate_grady_qscat.inc

1 subroutine da_calculate_grady_qscat(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    integer                      :: n
15 
16    if (iv%num_qscat > 0) then
17       do n=1, iv%num_qscat
18          if (iv%qscat(n)%u%qc < obs_qc_pointer) re%qscat(n)%u = 0.0
19          if (iv%qscat(n)%v%qc < obs_qc_pointer) re%qscat(n)%v = 0.0
20          jo_grad_y%qscat(n)%u = -re%qscat(n)%u / &
21                                (iv%qscat(n)%u%error * iv%qscat(n)%u%error)
22          jo_grad_y%qscat(n)%v = -re%qscat(n)%v / &
23                                (iv%qscat(n)%v%error * iv%qscat(n)%v%error)
24       end do
25    end if
26      
27 end subroutine da_calculate_grady_qscat
28 
29