subroutine da_qc_hirs (it, i, nchan, ob, iv) !--------------------------------------------------------------------------- ! Purpose: perform quality control for HIRS data. !--------------------------------------------------------------------------- implicit none integer, intent(in) :: it ! outer loop count integer, intent(in) :: i ! sensor index. integer, intent(in) :: nchan ! number of channel type (y_type), intent(in) :: ob ! Observation structure. type (iv_type), intent(inout) :: iv ! O-B structure. ! local variables integer :: n,scanpos,k,isflg,ios,fgat_rad_unit logical :: lmix ! real :: satzen integer :: ngood(nchan),nrej(nchan),nrej_omb_abs(nchan), & nrej_omb_std(nchan), & nrej_mixsurface,nrej_windowchanl, nrej_si, & nrej_clw,nrej_topo, num_proc_domain, & nrej_limb character(len=30) :: filename if (trace_use) call da_trace_entry("da_qc_hirs") ngood(:) = 0 nrej(:) = 0 nrej_omb_abs(:) = 0 nrej_omb_std(:) = 0 nrej_mixsurface = 0 nrej_windowchanl= 0 nrej_si = 0 nrej_clw = 0 nrej_topo = 0 nrej_limb = 0 num_proc_domain = 0 do n= iv%instid(i)%info%n1,iv%instid(i)%info%n2 if (iv%instid(i)%info%proc_domain(1,n)) num_proc_domain = num_proc_domain + 1 ! 0.0 initialise QC by flags assuming good obs !--------------------------------------------- iv%instid(i)%tb_qc(:,n) = qc_good ! a. reject all channels over mixture surface type !------------------------------------------------------ isflg = iv%instid(i)%isflg(n) lmix = (isflg==4) .or. (isflg==5) .or. (isflg==6) .or. (isflg==7) if (lmix) then iv%instid(i)%tb_qc(:,n) = qc_bad if (iv%instid(i)%info%proc_domain(1,n)) & nrej_mixsurface = nrej_mixsurface + 1 end if ! b. reject all channels over land/sea-ice/snow !------------------------------------------------------ if (isflg > 0) then iv%instid(i)%tb_qc(:,n) = qc_bad if (iv%instid(i)%info%proc_domain(1,n)) & nrej_windowchanl = nrej_windowchanl + 1 if (only_sea_rad) iv%instid(i)%tb_qc(:,n) = qc_bad end if ! c. reject channels 13,14(above top model 10mb),15 !------------------------------------------------------ !iv%instid(i)%tb_qc(13:15,n) = qc_bad ! reject limb obs !------------------------------------------------------ scanpos = iv%instid(i)%scanpos(n) if (scanpos <= 3 .or. scanpos >= 54) then iv%instid(i)%tb_qc(:,n) = qc_bad if (iv%instid(i)%info%proc_domain(1,n)) & nrej_limb = nrej_limb + 1 end if ! d. cloud detection to be added !----------------------------------------------------------- if (iv%instid(i)%clwp(n) >= 0.2) then iv%instid(i)%tb_qc(:,n) = qc_bad iv%instid(i)%cloud_flag(:,n) = qc_bad if (iv%instid(i)%info%proc_domain(1,n)) & nrej_clw = nrej_clw + 1 end if ! e. check surface height/pressure !----------------------------------------------------------- ! sfchgt = ivrad%info(n)%elv ! if (sfchgt >=) then ! else ! end if !if ((isflg .ne. 0) .and. (iv%instid(i)%ps(n) < 850.0)) then ! iv%instid(i)%tb_qc(5,n) = qc_bad ! if (iv%instid(i)%info%proc_domain(1,n)) & ! nrej_topo = nrej_topo + 1 !end if ! g. check iuse from information file (channel selection) !----------------------------------------------------------- do k = 1, nchan if (satinfo(i)%iuse(k) .eq. -1) & iv%instid(i)%tb_qc(k,n) = qc_bad end do ! f. check innovation !----------------------------------------------------------- do k = 1, nchan ! 1. check absolute value of innovation !------------------------------------------------ if (abs(iv%instid(i)%tb_inv(k,n)) > 15.0) then iv%instid(i)%tb_qc(k,n) = qc_bad if (iv%instid(i)%info%proc_domain(1,n)) & nrej_omb_abs(k) = nrej_omb_abs(k) + 1 end if ! 2. check relative value of innovation ! and assign of the observation error (standard deviation) !------------------------------------------------------------------------ if (use_error_factor_rad) then ! if use error tuning factor iv%instid(i)%tb_error(k,n) = & satinfo(i)%error(k)*satinfo(i)%error_factor(k) else iv%instid(i)%tb_error(k,n) = satinfo(i)%error(k) end if if (abs(iv%instid(i)%tb_inv(k,n)) > 3.0*iv%instid(i)%tb_error(k,n)) then iv%instid(i)%tb_qc(k,n) = qc_bad if (iv%instid(i)%info%proc_domain(1,n)) & nrej_omb_std(k) = nrej_omb_std(k) + 1 end if ! 3. Final QC decision !--------------------------------------------- if (iv%instid(i)%tb_qc(k,n) == qc_bad) then ! bad obs iv%instid(i)%tb_error(k,n) = 500.0 if (iv%instid(i)%info%proc_domain(1,n)) & nrej(k) = nrej(k) + 1 else ! good obs if (iv%instid(i)%info%proc_domain(1,n)) & ngood(k) = ngood(k) + 1 end if end do ! chan end do ! end loop pixel ! Do inter-processor communication to gather statistics. call da_proc_sum_int (num_proc_domain) call da_proc_sum_int (nrej_mixsurface) call da_proc_sum_int (nrej_windowchanl) call da_proc_sum_int (nrej_si ) call da_proc_sum_int (nrej_clw) call da_proc_sum_int (nrej_topo) call da_proc_sum_int (nrej_limb) call da_proc_sum_ints (nrej_omb_abs(:)) call da_proc_sum_ints (nrej_omb_std(:)) call da_proc_sum_ints (nrej(:)) call da_proc_sum_ints (ngood(:)) if (rootproc) then if (num_fgat_time > 1) then write(filename,'(i2.2,a,i2.2)') it,'_qcstat_'//trim(iv%instid(i)%rttovid_string)//'_',iv%time else write(filename,'(i2.2,a)') it, '_qcstat_'//trim(iv%instid(i)%rttovid_string) end if call da_get_unit(fgat_rad_unit) open(fgat_rad_unit,file=trim(filename),form='formatted',iostat=ios) if (ios /= 0) then write(unit=message(1),fmt='(A,A)') 'error opening the output file ', filename call da_error(__FILE__,__LINE__,message(1:1)) end if write(fgat_rad_unit, fmt='(/a/)') ' Quality Control Statistics for '//iv%instid(i)%rttovid_string write(fgat_rad_unit,'(a20,i7)') ' num_proc_domain = ', num_proc_domain write(fgat_rad_unit,'(a20,i7)') ' nrej_mixsurface = ', nrej_mixsurface write(fgat_rad_unit,'(a20,i7)') ' nrej_windowchanl = ', nrej_windowchanl write(fgat_rad_unit,'(a20,i7)') ' nrej_si = ', nrej_si write(fgat_rad_unit,'(a20,i7)') ' nrej_clw = ', nrej_clw write(fgat_rad_unit,'(a20,i7)') ' nrej_topo = ', nrej_topo write(fgat_rad_unit,'(a20,i7)') ' nrej_limb = ', nrej_limb write(fgat_rad_unit,'(a20)') ' nrej_omb_abs(:) = ' write(fgat_rad_unit,'(10i7)') nrej_omb_abs(:) write(fgat_rad_unit,'(a20)') ' nrej_omb_std(:) = ' write(fgat_rad_unit,'(10i7)') nrej_omb_std(:) write(fgat_rad_unit,'(a20)') ' nrej(:) = ' write(fgat_rad_unit,'(10i7)') nrej(:) write(fgat_rad_unit,'(a20)') ' ngood(:) = ' write(fgat_rad_unit,'(10i7)') ngood(:) close(fgat_rad_unit) call da_free_unit(fgat_rad_unit) end if if (trace_use) call da_trace_exit("da_qc_hirs") end subroutine da_qc_hirs