da_calculate_grady_metar.inc

1 subroutine da_calculate_grady_metar(iv, re, jo_grad_y)
2 
3    !-------------------------------------------------------------------------
4    ! Purpose: Applies obs inverse on re-vector
5    !-------------------------------------------------------------------------
6 
7    implicit none
8 
9    type (ob_type), intent(in)   :: iv          ! Innovation vector.
10    type (y_type), intent(inout) :: re          ! Residual vector.
11    type (y_type), intent(inout) :: jo_grad_y   ! Grad_y(Jo)
12 
13    integer                      :: n
14 
15    if (trace_use) call da_trace_entry("da_calculate_grady_metar")
16 
17    if (iv%num_metar > 0) then
18       do n=1, iv%num_metar
19          if (iv%metar(n)%u%qc < obs_qc_pointer) re%metar(n)%u = 0.0
20          if (iv%metar(n)%v%qc < obs_qc_pointer) re%metar(n)%v = 0.0
21          if (iv%metar(n)%t%qc < obs_qc_pointer) re%metar(n)%t = 0.0
22          if (iv%metar(n)%p%qc < obs_qc_pointer) re%metar(n)%p = 0.0
23          if (iv%metar(n)%q%qc < obs_qc_pointer) re%metar(n)%q = 0.0
24 
25          jo_grad_y%metar(n)%u = -re%metar(n)%u / &
26                                (iv%metar(n)%u%error * iv%metar(n)%u%error)
27          jo_grad_y%metar(n)%v = -re%metar(n)%v / &
28                                (iv%metar(n)%v%error * iv%metar(n)%v%error)
29          jo_grad_y%metar(n)%t = -re%metar(n)%t / &
30                                (iv%metar(n)%t%error * iv%metar(n)%t%error)
31          jo_grad_y%metar(n)%p = -re%metar(n)%p / &
32                                (iv%metar(n)%p%error * iv%metar(n)%p%error)
33          jo_grad_y%metar(n)%q = -re%metar(n)%q / &
34                                (iv%metar(n)%q%error * iv%metar(n)%q%error)
35       end do
36    end if
37 
38    if (trace_use) call da_trace_exit("da_calculate_grady_metar")
39      
40 end subroutine da_calculate_grady_metar
41 
42