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 (ob_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 
15    integer                      :: n, k
16 
17    jo % pilot_u = 0.0
18    jo % pilot_v = 0.0
19 
20    if (iv%num_pilot > 0) then
21       do n=1, iv%num_pilot
22          do k=1, iv%pilot(n)%info%levels
23             jo_grad_y%pilot(n)%u(k) = -re%pilot(n)%u(k) / &
24                                     (iv%pilot(n)%u(k)%error * &
25                                       iv%pilot(n)%u(k)%error)
26             jo_grad_y%pilot(n)%v(k) = -re%pilot(n)%v(k) / &
27                                     (iv%pilot(n)%v(k)%error * &
28                                       iv%pilot(n)%v(k)%error)
29          end do
30 
31         if (iv%pilot(n)%loc%proc_domain) then
32            do k=1, iv%pilot(n)%info%levels
33               jo % pilot_u = jo % pilot_u - &
34                           re%pilot(n)%u(k) * jo_grad_y%pilot(n)%u(k)
35               jo % pilot_v = jo % pilot_v - &
36                           re%pilot(n)%v(k) * jo_grad_y%pilot(n)%v(k)
37            end do
38          end if
39       end do
40 
41       jo % pilot_u = 0.5 * jo % pilot_u
42       jo % pilot_v = 0.5 * jo % pilot_v
43 
44    end if
45 
46 end subroutine da_jo_and_grady_pilot
47 
48