da_calculate_grady_gpspw.inc

1 subroutine da_calculate_grady_gpspw(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
14 
15    if (trace_use_dull) call da_trace_entry("da_calculate_grady_gpspw")
16 
17    do n=1, iv%info(gpspw)%nlocal
18       if (iv%gpspw(n)%tpw%qc < obs_qc_pointer) then
19          re%gpspw(n)%tpw = 0.0
20       end if
21 
22       jo_grad_y%gpspw(n)%tpw = -re%gpspw(n)%tpw / (iv%gpspw(n)%tpw%error * iv%gpspw(n)%tpw%error)
23    end do
24 
25    if (trace_use_dull) call da_trace_exit("da_calculate_grady_gpspw")
26 
27 
28 end subroutine da_calculate_grady_gpspw
29 
30