da_jo_and_grady_airsr.inc

1 subroutine da_jo_and_grady_airsr(iv, re, jo, jo_grad_y)
2 
3    !-------------------------------------------------------------------------
4    ! Purpose: Calculates cost function and its gradient at all AIRS 
5    ! retrieval locations   
6    !-------------------------------------------------------------------------
7 
8    implicit none
9 
10    type (iv_type), intent(in)    :: iv         ! Innovation vector.
11    type (y_type),  intent(in)    :: re         ! Residual vector.
12    type (y_type),  intent(inout) :: jo_grad_y  ! Grad_y(Jo)
13    type (jo_type), intent(inout) :: jo         ! Obs cost function.
14 
15    integer :: n, k
16 
17    if (trace_use_dull) call da_trace_entry("da_jo_and_grady_airsr")
18 
19    jo % airsr_t = 0.0
20    jo % airsr_q = 0.0
21 
22    do n=1, iv%info(airsr)%nlocal
23       do k=1, iv%info(airsr)%levels(n)
24          jo_grad_y%airsr(n)%t(k) = -re%airsr(n)%t(k) / (iv%airsr(n)%t(k)%error * iv%airsr(n)%t(k)%error)
25          jo_grad_y%airsr(n)%q(k) = -re%airsr(n)%q(k) / (iv%airsr(n)%q(k)%error * iv%airsr(n)%q(k)%error)
26       end do
27 
28       if (iv%info(airsr)%proc_domain(1,n)) then
29          do k=1, iv%info(airsr)%levels(n)
30             jo % airsr_t = jo % airsr_t - re%airsr(n)%t(k) * jo_grad_y%airsr(n)%t(k)
31             jo % airsr_q = jo % airsr_q - re%airsr(n)%q(k) * jo_grad_y%airsr(n)%q(k)
32          end do
33       end if
34    end do
35 
36    jo % airsr_t = 0.5 * jo % airsr_t
37    jo % airsr_q = 0.5 * jo % airsr_q
38 
39    if (trace_use_dull) call da_trace_exit("da_jo_and_grady_airsr")
40 
41  end subroutine da_jo_and_grady_airsr
42 
43