da_jo_and_grady_geoamv.inc

1 subroutine da_jo_and_grady_geoamv( iv, re, jo, jo_grad_y)
2 
3    !-------------------------------------------------------------------------
4    ! Purpose:  Calculates Cost function and Gradient for Geo. CVMs 
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    integer                      :: n, k
15 
16    jo % geoamv_u = 0.0
17    jo % geoamv_v = 0.0
18 
19    if (iv%num_geoamv > 0) then
20       do n=1, iv%num_geoamv
21          do k=1, iv%geoamv(n)%info%levels
22             jo_grad_y%geoamv(n)%u(k) = -re%geoamv(n)%u(k) / &
23                                         ( iv%geoamv(n)%u(k)%error * &
24                                            iv%geoamv(n)%u(k)%error)
25             jo_grad_y%geoamv(n)%v(k) = -re%geoamv(n)%v(k) / &
26                                         ( iv%geoamv(n)%v(k)%error * &
27                                            iv%geoamv(n)%v(k)%error)
28          end do
29 
30          if (iv%geoamv(n)%loc%proc_domain) then
31             do k=1, iv%geoamv(n)%info%levels
32                jo % geoamv_u = jo % geoamv_u - &
33                             re%geoamv(n)%u(k) * jo_grad_y%geoamv(n)%u(k)
34                jo % geoamv_v = jo % geoamv_v - &
35                             re%geoamv(n)%v(k) * jo_grad_y%geoamv(n)%v(k)
36             end do
37          end if
38       end do
39 
40       jo % geoamv_u = 0.5 * jo % geoamv_u
41       jo % geoamv_v = 0.5 * jo % geoamv_v
42 
43    end if
44      
45 end subroutine da_jo_and_grady_geoamv
46 
47