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 (ob_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    jo % airsr_t = 0.0
18    jo % airsr_q = 0.0
19 
20    if (iv%num_airsr < 0) return
21 
22    do n=1, iv%num_airsr
23       do k=1, iv%airsr(n)%info%levels
24          jo_grad_y%airsr(n)%t(k) = -re%airsr(n)%t(k) / &
25                                     (iv%airsr(n)%t(k)%error * &
26                                       iv%airsr(n)%t(k)%error)
27          jo_grad_y%airsr(n)%q(k) = -re%airsr(n)%q(k) / &
28                                     (iv%airsr(n)%q(k)%error * &
29                                       iv%airsr(n)%q(k)%error)
30       end do
31 
32       if (iv%airsr(n)%loc%proc_domain) then
33          do k=1, iv%airsr(n)%info%levels
34             jo % airsr_t = jo % airsr_t - &
35                        re%airsr(n)%t(k) * jo_grad_y%airsr(n)%t(k)
36             jo % airsr_q = jo % airsr_q - &
37                        re%airsr(n)%q(k) * jo_grad_y%airsr(n)%q(k)
38          end do
39       end if
40    end do
41 
42    jo % airsr_t = 0.5 * jo % airsr_t
43    jo % airsr_q = 0.5 * jo % airsr_q
44 
45  end subroutine da_jo_and_grady_airsr
46 
47