da_jo_and_grady_satem.inc

1 subroutine da_jo_and_grady_satem(iv, re, jo, jo_grad_y)
2 
3    !-----------------------------------------------------------------------
4    ! Purpose: TBD
5    !-----------------------------------------------------------------------
6 
7    implicit none
8 
9    type (iv_type), intent(in)   :: iv          ! Innovation vector.
10    type (y_type), intent(in)    :: re          ! Residual vector.
11    type (y_type), intent(inout) :: jo_grad_y   ! Grad_y(Jo)
12    type (jo_type), intent(inout):: jo          ! Obs cost function.
13 
14    integer :: n, k
15 
16    if (trace_use_dull) call da_trace_entry("da_jo_and_grady_satem")
17 
18    jo % satem_thickness = 0.0
19 
20    do n=1, iv%info(satem)%nlocal
21       do k=1, iv%info(satem)%levels(n)
22          jo_grad_y%satem(n)%thickness(k) = -re%satem(n)%thickness(k) / &
23             (iv%satem(n)%thickness(k)%error * iv%satem(n)%thickness(k)%error)
24       end do
25 
26       if (iv%info(satem)%proc_domain(1,n)) then
27          do k=1, iv%info(satem)%levels(n)
28             jo % satem_thickness = jo % satem_thickness - &
29                re%satem(n)%thickness(k) * jo_grad_y%satem(n)%thickness(k)
30          end do
31       end if
32    end do
33 
34    jo % satem_thickness = 0.5 * jo % satem_thickness
35 
36    if (trace_use_dull) call da_trace_exit("da_jo_and_grady_satem")
37 
38 end subroutine da_jo_and_grady_satem
39 
40