55 2160
McElroy, Tom;Midwinter, Clive;Barton, David;Hall, Bob;Kerr, James;Wardle, David
ENVIRONMENT CANADA, Dowsview, Ontario, CANADA M3H 5T4 (416) 739-4630
Brewer Ozone Spectrophotometer data at Fairbanks ( 64.84, 147.56)
POLARIS
1 1
1997 05 17 1997 05 17
0
13
elapsed time in UT seconds from 0000 hours on the day given in DATE
Station name
9
1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0
99 99 99 999 999 999 999 999 999
hour
minute
second
airmass
ozone [DU] (Dobson Units)
ozone error [DU] (Dobson Units)
SO2 [DU] (Dobson Units)
SO2 error [DU] (Dobson Units)
Number of data points in row
9
0
1 1 1 1 1 1 1 1 1
99 9999 999 999 99999 999 999 999 999
number of observations
instrument number
station latitude (degrees)
station longitude (degrees)
station elevation (m)
daily mean O3 [DU] (Dobson Units)
daily mean O3 error [DU] (Dobson Units)
daily mean SO2 [DU] (Dobson Units)
daily mean SO2 error [DU] (Dobson Units)
1
*** preliminary data ***
16
The Brewer Ozone Spectrophotometer is a 15-cm focal-length, modified
Ebert-Fastie spectrograph which makes rapid, time-multiplexed
measurements in the UV-B region of the solar spectrum. A typical
direct sun observation is the average of 5 separate observations.
If the standard deviation of the measurements is less than 2 DU, the
measurement is taken as acceptable. If the standard deviation is larger,
it is interpreted as indicating variability of the solar intensity, i.e.:
clouds or other optical attenuation. Each of the five ozone
measurements which contributes to the average value are composed of 40
short observation samples. A cycle of 2 samples on each of the five
wavelengths takes place in about 1.2 seconds. The usual measurement of
20 cycles takes under 30 seconds. Daily averages are calcluted using
all good observations and are reported as the last line in the data
table.
Fairbanks
29 007 64.84 147.56 0.0 373.4 11.0 2.0 1.5
60747 16 52 27 2.371 355.6 1.2 -0.5 0.6 5
61278 17 01 18 2.292 356.5 2.2 -0.2 0.9 5
63026 17 30 26 2.072 359.4 2.9 -0.2 0.7 5
63557 17 39 17 2.016 361.9 2.1 -0.6 1.0 5
65562 18 12 42 1.836 363.8 3.2 0.2 0.9 5
66836 18 33 56 1.745 362.6 0.8 0.8 0.3 5
67575 18 46 15 1.699 363.2 1.2 0.9 0.3 5
68311 18 58 31 1.658 366.6 2.4 0.9 0.5 5
68849 19 07 29 1.630 363.6 0.9 1.7 0.2 5
69586 19 19 46 1.596 366.2 1.3 2.0 0.5 5
70323 19 32 03 1.565 366.9 1.5 2.3 0.5 5
70859 19 40 59 1.545 365.2 1.4 2.9 0.4 5
72852 20 14 12 1.485 367.0 1.6 2.9 0.6 5
77481 21 31 21 1.419 372.1 3.1 3.2 0.7 5
78519 21 48 39 1.418 372.0 0.9 2.9 0.6 5
78750 21 52 30 1.418 373.0 3.4 3.3 1.2 5
79789 22 09 49 1.421 374.8 0.9 3.8 0.3 5
80325 22 18 45 1.425 375.9 2.1 3.3 0.8 5
81063 22 31 03 1.432 381.1 2.4 2.7 0.5 5
82103 22 48 23 1.446 383.0 2.8 3.2 0.6 5
82639 22 57 19 1.456 381.9 1.4 3.4 0.4 5
83377 23 09 37 1.471 380.0 1.6 4.1 0.4 5
84410 23 26 50 1.496 381.8 1.9 4.7 0.7 5
85681 23 48 01 1.535 380.2 4.3 4.6 0.9 5
88843 00 40 43 1.675 389.6 1.4 1.5 0.5 5
89380 00 49 40 1.706 389.8 1.2 1.8 0.2 5
90121 01 02 01 1.753 390.1 2.1 1.6 0.6 5
91163 01 19 23 1.827 391.2 0.7 1.3 0.3 5
91700 01 28 20 1.870 393.1 2.3 0.6 0.8 5
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