da_calculate_grady_geoamv.inc

1 subroutine da_calculate_grady_geoamv(iv, re, jo_grad_y)
2 
3    !-------------------------------------------------------------------------
4    ! Purpose: Calculates Gradient of Geo. CMVs Obs.
5    !               
6    !-------------------------------------------------------------------------
7 
8    implicit none
9 
10 
11    type (iv_type), intent(in)     :: iv          ! Innovation vector.
12    type (y_type),  intent(inout)  :: re          ! Residual vector.
13    type (y_type),  intent(inout)  :: jo_grad_y   ! Grad_y(Jo)
14 
15    integer                      :: n , k
16    
17    if (trace_use_dull) call da_trace_entry("da_calculate_grady_geoamv")  
18 
19    do n=1, iv%info(geoamv)%nlocal
20       do k=1, iv%info(geoamv)%levels(n)
21          if (iv%geoamv(n)%u(k)%qc < obs_qc_pointer) re%geoamv(n)%u(k) = 0.0
22          if (iv%geoamv(n)%v(k)%qc < obs_qc_pointer) re%geoamv(n)%v(k) = 0.0
23 
24          jo_grad_y%geoamv(n)%u(k) = -re%geoamv(n)%u(k) / (iv%geoamv(n)%u(k)%error * iv%geoamv(n)%u(k)%error)
25          jo_grad_y%geoamv(n)%v(k) = -re%geoamv(n)%v(k) / (iv%geoamv(n)%v(k)%error * iv%geoamv(n)%v(k)%error)
26       end do
27    end do
28    
29    if (trace_use_dull) call da_trace_exit("da_calculate_grady_geoamv")  
30 
31 end subroutine da_calculate_grady_geoamv
32 
33