da_jo_and_grady_pilot.inc

1 subroutine da_jo_and_grady_pilot(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_pilot")
17 
18    jo % pilot_u = 0.0
19    jo % pilot_v = 0.0
20 
21    do n=1, iv%info(pilot)%nlocal
22       do k=1, iv%info(pilot)%levels(n)
23          jo_grad_y%pilot(n)%u(k) = -re%pilot(n)%u(k) / (iv%pilot(n)%u(k)%error * iv%pilot(n)%u(k)%error)
24          jo_grad_y%pilot(n)%v(k) = -re%pilot(n)%v(k) / (iv%pilot(n)%v(k)%error * iv%pilot(n)%v(k)%error)
25       end do
26 
27      if (iv%info(pilot)%proc_domain(1,n)) then
28         do k=1, iv%info(pilot)%levels(n)
29            jo % pilot_u = jo % pilot_u - re%pilot(n)%u(k) * jo_grad_y%pilot(n)%u(k)
30            jo % pilot_v = jo % pilot_v - re%pilot(n)%v(k) * jo_grad_y%pilot(n)%v(k)
31         end do
32       end if
33    end do
34 
35    jo % pilot_u = 0.5 * jo % pilot_u
36    jo % pilot_v = 0.5 * jo % pilot_v
37 
38    if (trace_use_dull) call da_trace_exit("da_jo_and_grady_pilot")
39 
40 end subroutine da_jo_and_grady_pilot
41 
42