da_qc_hirs.inc
References to this file elsewhere.
1 subroutine da_qc_hirs (i, nchan, ob, iv)
2
3 !---------------------------------------------------------------------------
4 ! Purpose: perform quality control for HIRS data.
5 !---------------------------------------------------------------------------
6
7 implicit none
8
9 integer, intent(in) :: i ! sensor index.
10 integer, intent(in) :: nchan ! number of channel
11 type (y_type), intent(in) :: ob ! Observation structure.
12 type (ob_type), intent(inout) :: iv ! O-B structure.
13
14
15 ! local variables
16 integer :: n,scanpos,k,isflg,ios,fgat_rad_unit
17 logical :: lmix
18 ! real :: satzen
19 integer :: ngood(nchan),nrej(nchan),nrej_omb_abs(nchan), &
20 nrej_omb_std(nchan), &
21 nrej_mixsurface,nrej_windowchanl, nrej_si, &
22 nrej_clw,nrej_topo,num_rad, num_proc_domain, &
23 nrej_limb
24
25 character(len=30) :: filename
26
27 if (trace_use) call da_trace_entry("da_qc_hirs")
28
29 ngood(:) = 0
30 nrej(:) = 0
31 nrej_omb_abs(:) = 0
32 nrej_omb_std(:) = 0
33 nrej_mixsurface = 0
34 nrej_windowchanl= 0
35 nrej_si = 0
36 nrej_clw = 0
37 nrej_topo = 0
38 nrej_limb = 0
39 num_rad = iv%ob_numb(iv%current_ob_time)%radiance(i)- &
40 iv%ob_numb(iv%current_ob_time-1)%radiance(i)
41 ! num_rad = iv%instid(i)%num_rad
42 num_proc_domain = 0
43
44 if (num_rad > 0) then
45
46 ! do n= 1, iv%instid(i)%num_rad ! loop for pixel
47 do n= iv%ob_numb(iv%current_ob_time-1)%radiance(i)+1, iv%ob_numb(iv%current_ob_time)%radiance(i)
48
49 if (iv%instid(i)%proc_domain(n)) &
50 num_proc_domain = num_proc_domain + 1
51
52 ! 0.0 initialise QC by flags assuming good obs
53 !---------------------------------------------
54 iv%instid(i)%tb_qc(:,n) = qc_good
55
56 ! a. reject all channels over mixture surface type
57 !------------------------------------------------------
58 isflg = iv%instid(i)%isflg(n)
59 lmix = (isflg==4) .or. (isflg==5) .or. (isflg==6) .or. (isflg==7)
60 if (lmix) then
61 iv%instid(i)%tb_qc(:,n) = qc_bad
62 if (iv%instid(i)%proc_domain(n)) &
63 nrej_mixsurface = nrej_mixsurface + 1
64 end if
65
66 ! b. reject all channels over land/sea-ice/snow
67 !------------------------------------------------------
68 if (isflg > 0) then
69 iv%instid(i)%tb_qc(:,n) = qc_bad
70 if (iv%instid(i)%proc_domain(n)) &
71 nrej_windowchanl = nrej_windowchanl + 1
72 end if
73
74 ! c. reject channels 13,14(above top model 10mb),15
75 !------------------------------------------------------
76 !iv%instid(i)%tb_qc(13:15,n) = qc_bad
77
78 ! reject limb obs
79 !------------------------------------------------------
80 scanpos = iv%instid(i)%scanpos(n)
81 if (scanpos <= 3 .or. scanpos >= 54) then
82 iv%instid(i)%tb_qc(:,n) = qc_bad
83 if (iv%instid(i)%proc_domain(n)) &
84 nrej_limb = nrej_limb + 1
85 end if
86
87 ! d. cloud detection to be added
88 !-----------------------------------------------------------
89 if (iv%instid(i)%clwp(n) >= 0.2) then
90 iv%instid(i)%tb_qc(:,n) = qc_bad
91 iv%instid(i)%cloud_flag(:,n) = qc_bad
92 if (iv%instid(i)%proc_domain(n)) &
93 nrej_clw = nrej_clw + 1
94 end if
95
96 ! e. check surface height/pressure
97 !-----------------------------------------------------------
98 ! sfchgt = ivrad%info(n)%elv
99 ! if (sfchgt >=) then
100 ! else
101 ! end if
102
103 !if ((isflg .ne. 0) .and. (iv%instid(i)%ps(n) < 850.)) then
104 ! iv%instid(i)%tb_qc(5,n) = qc_bad
105 ! if (iv%instid(i)%proc_domain(n)) &
106 ! nrej_topo = nrej_topo + 1
107 !end if
108
109 ! g. check iuse from information file (channel selection)
110 !-----------------------------------------------------------
111 do k = 1, nchan
112 if (satinfo(i)%iuse(k) .eq. -1) &
113 iv%instid(i)%tb_qc(k,n) = qc_bad
114 end do
115
116 ! f. check innovation
117 !-----------------------------------------------------------
118 do k = 1, nchan
119
120 ! 1. check absolute value of innovation
121 !------------------------------------------------
122 if (abs(iv%instid(i)%tb_inv(k,n)) > 15.) then
123 iv%instid(i)%tb_qc(k,n) = qc_bad
124 if (iv%instid(i)%proc_domain(n)) &
125 nrej_omb_abs(k) = nrej_omb_abs(k) + 1
126 end if
127
128 ! 2. check relative value of innovation
129 ! and assign of the observation error (standard deviation)
130 !------------------------------------------------------------------------
131 if (use_error_factor_rad) then ! if use error tuning factor
132 iv%instid(i)%tb_error(k,n) = &
133 satinfo(i)%error(k)*satinfo(i)%error_factor(k)
134 else
135 iv%instid(i)%tb_error(k,n) = satinfo(i)%error(k)
136 end if
137
138 if (abs(iv%instid(i)%tb_inv(k,n)) > 3.0*iv%instid(i)%tb_error(k,n)) then
139 iv%instid(i)%tb_qc(k,n) = qc_bad
140 if (iv%instid(i)%proc_domain(n)) &
141 nrej_omb_std(k) = nrej_omb_std(k) + 1
142 end if
143
144 ! 3. Final QC decision
145 !---------------------------------------------
146 if (iv%instid(i)%tb_qc(k,n) == qc_bad) then ! bad obs
147 iv%instid(i)%tb_error(k,n) = 500.0
148 if (iv%instid(i)%proc_domain(n)) &
149 nrej(k) = nrej(k) + 1
150 else ! good obs
151 if (iv%instid(i)%proc_domain(n)) &
152 ngood(k) = ngood(k) + 1
153 end if
154 end do ! chan
155 end do ! end loop pixel
156 end if
157
158 ! Do inter-processor communication to gather statistics.
159 call da_proc_sum_int (num_proc_domain)
160 call da_proc_sum_int (nrej_mixsurface)
161 call da_proc_sum_int (nrej_windowchanl)
162 call da_proc_sum_int (nrej_si )
163 call da_proc_sum_int (nrej_clw)
164 call da_proc_sum_int (nrej_topo)
165 call da_proc_sum_int (nrej_limb)
166 call da_proc_sum_ints (nrej_omb_abs(:))
167 call da_proc_sum_ints (nrej_omb_std(:))
168 call da_proc_sum_ints (nrej(:))
169 call da_proc_sum_ints (ngood(:))
170
171 if (rootproc) then
172 if (num_fgat_time > 1) then
173 write(filename,'(a,i2.2)') 'qcstat_'//trim(iv%instid(i)%rttovid_string)//'_',iv%current_ob_time
174 else
175 filename = 'qcstat_'//trim(iv%instid(i)%rttovid_string)
176 end if
177
178 call da_get_unit(fgat_rad_unit)
179 open(fgat_rad_unit,file=trim(filename),form='formatted',iostat=ios)
180 if (ios /= 0) Then
181 write(unit=message(1),fmt='(A,A)') 'error opening the output file ', filename
182 call da_error(__FILE__,__LINE__,message(1:1))
183 end if
184
185 write(fgat_rad_unit, fmt='(/a/)') ' Quality Control Statistics for '//iv%instid(i)%rttovid_string
186 write(fgat_rad_unit,'(a20,i7)') ' num_proc_domain = ', num_proc_domain
187 write(fgat_rad_unit,'(a20,i7)') ' nrej_mixsurface = ', nrej_mixsurface
188 write(fgat_rad_unit,'(a20,i7)') ' nrej_windowchanl = ', nrej_windowchanl
189 write(fgat_rad_unit,'(a20,i7)') ' nrej_si = ', nrej_si
190 write(fgat_rad_unit,'(a20,i7)') ' nrej_clw = ', nrej_clw
191 write(fgat_rad_unit,'(a20,i7)') ' nrej_topo = ', nrej_topo
192 write(fgat_rad_unit,'(a20,i7)') ' nrej_limb = ', nrej_limb
193 write(fgat_rad_unit,'(a20)') ' nrej_omb_abs(:) = '
194 write(fgat_rad_unit,'(10i7)') nrej_omb_abs(:)
195 write(fgat_rad_unit,'(a20)') ' nrej_omb_std(:) = '
196 write(fgat_rad_unit,'(10i7)') nrej_omb_std(:)
197 write(fgat_rad_unit,'(a20)') ' nrej(:) = '
198 write(fgat_rad_unit,'(10i7)') nrej(:)
199 write(fgat_rad_unit,'(a20)') ' ngood(:) = '
200 write(fgat_rad_unit,'(10i7)') ngood(:)
201
202 close(fgat_rad_unit)
203 call da_free_unit(fgat_rad_unit)
204 end if
205
206 if (trace_use) call da_trace_exit("da_qc_hirs")
207
208 end subroutine da_qc_hirs
209