WTC _,

IPC VII Part 1: Measurements and Results
(p.33). Sunphotometer measurements are used to determine total vertical optica! depth at 368,500 and 778 nm (p.32).
The daily Ozone values are measured at Arosa and amount to: 28.09: 273.0, 2.10: 282.8, 3.10: 278.5, 9.10: 270.0,
10.10: 260.0 and 11.10: 261.6 mcm (Dobsön units).
4. Results
A total of 36 runs taken during 7 days (1 to 11 runs per day) have been selected for the finai evaluation.- The
value of PM02 readings are plotted in Fig.2.28 (p,31) and the individual ratios to PM02 on Fig.2.1-2.57 (pp.12-30)
together with the frequency distribution of the data to ülustrate possible deviaüons from a normal distribution. The
sky eonditions were not always ideal and the criteria for keeping a specific reading is based on the Standard deviation
of the 8 readings of PM02, which had to be lower than 0.8 Wm"^. If this criterion was not reached the readings of
all instruments at that particular time were dismissed. The mean results are summarized in Table 1!2 with the
calibration faetdrs (C„ Q, C3) used in the evaluation and the WRR calibration factor from IPC VI if available.
Instrument
PM02
PM05
CROM 2L
CROM 3L
PAC 3
MKVI-67814
HF-18748
PM06-5
PMO6-10
PM06-79121
PMÖ6-80022
PMO6r811104
PMO6-811107
PMO6-811108
PMO6-850401
PMO6-850407
EPAC-12843
EPAC-13219
EPAC-13617
HF-14915
HF-15744
HF-17142
HF-18747
HF-19746
HF-21185
HF-23725
HF-27159
HF-27160
HF-27162
HF-27798
Calibration Cönstants
C2 C3
24.18
31.615
127.687
127.549
9962.6 .07 75
10007. 10.
19989. .07 75
23/729 '
22.6395
23.847
23i9l5
23.855
24.031
24.0887
24.095
24.046
1.0035
10079.
10024.
20010.
20020.
20020.
20014;
19975.
20020.
19970.2
20030.
20030.
20020.
20020.
.064
.064
.066
.066
.066
.066
066
.066
Table 1.2: Ratios to PM02 and WRR-WSG
Comments
WRR (IPC VI) 24^1546
WRR (IPC VI) 31.6384
WRR (IPC VI) 128.0215
WRR (IPC VI) 127.4852
WRR (IPC VI) 9965.59
WRR (IPC VI) 10015.3
WRR (IPC VI) 23.7314
WRR (IPC VI) 22.7346
WRR (1987)
WRR (IPC VI) 23.9205
Charäcterization 1982
WRR (IPC VI) 24.0120
Change in electronics
WRR (1985)
WRR (1986) 24.196
WRR (IPC VI)
WRR (IPC VI)
WRR (IPC VI) 10052.1
WRR (IPC VI) 19978.4
WRR (IPC VI) 20020.6
WRR (TPC VI) 19982.
WRR (IPC VI) 19998.6
WRR (IPC VI) 19973.8
WRR (IPC VI)
Ratio to PM02
with C used
1.00000
.99881 + .00092
' .99651 + .00140*
1.00054 ± .00140
.99917 ± .00085
.99850 ± .00090
(1.00022 ± .00197
1.00073 ± .00417
.99717 ± .00219
.99320 ± .00090
1.00232 ± .00090
1.00044 ± .00119
.99995 ± .00153
.99947 + .00087
1.00085 + .00189
.99141 ± .00187
1.00152 + .00169
1.00031 + .00541
.99716 + .00193
1.00104 + .00129
.99976 ± .00098
1,00244 ± .00158
1.00027 + .00132
.99790 ± .00122
1.00012+ .00161
.99838 ± 00188
1.00016 ± .00113
1.00217 ±.00115
, .99907 ± .00133
L00107 ±.00146
Ratio to Change Fig.
WRRwsG PP*^ ' page
-.99951 -487
1.000H 113
.99984 -157
1.00060 603
1.00003 33
.99989 -107
31
12
12
12
13
13
1.00078)') 13
1.00140 1396 14
1.00192 1924 14
.99376
14 ..
L00312 3117 15
1.00101 15
.99969 -306 15
1.00003 16
1.00142 16
.99816 16
1.00209 2085
1.00088 1 875
17
17
1.00052 520 17
1.00002 .23 18
1.00035 . 354 18
1.00110 1102 18
1.00007 65 19
.99840 -1597 19
1.00069 19
.99894 1056 20
1.000731 20
1.00274 20
.99963
21
1.00164
21
') After the comparison a bug was found in the cavity; although it was not in beam the results have to be discarded.
5