subroutine da_calculate_grady_gpsref(iv, re, jo_grad_y) !---------------------------------------------------------------------- ! Purpose: Applies obs inverse on re-vector !---------------------------------------------------------------------- implicit none type (iv_type), intent(in) :: iv ! Innovation vector. type (y_type), intent(inout) :: re ! Residual vector. type (y_type), intent(inout) :: jo_grad_y ! Grad_y(Jo) integer :: n, k if (trace_use_dull) call da_trace_entry("da_calculate_grady_gpsref") do n=1, iv%info(gpsref)%nlocal do k=1, iv%info(gpsref)%levels(n) if (iv%gpsref(n)%ref(k)%qc < obs_qc_pointer) then re%gpsref(n)%ref(k) = 0.0 end if jo_grad_y%gpsref(n)%ref(k) = -re%gpsref(n)%ref(k) / (iv%gpsref(n)%ref(k)%error * iv%gpsref(n)%ref(k)%error) end do end do if (trace_use_dull) call da_trace_exit("da_calculate_grady_gpsref") end subroutine da_calculate_grady_gpsref