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 08 10 1997 08 10
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
15 007 64.84 147.56 0.0 270.1 6.4 2.8 0.9
61595 17 06 35 2.677 268.3 1.0 0.9 0.4 5
62769 17 26 09 2.466 262.6 2.5 2.3 0.9 5
63282 17 34 42 2.386 263.0 2.6 2.7 0.6 5
63801 17 43 21 2.311 265.0 1.3 2.8 0.4 5
64927 18 02 07 2.168 265.6 1.0 3.1 0.4 5
65441 18 10 41 2.110 264.4 1.1 3.6 0.3 5
65956 18 19 16 2.057 265.3 1.4 3.8 0.3 5
68598 19 03 18 1.838 268.0 0.9 3.4 0.4 5
69285 19 14 45 1.793 268.8 1.4 3.6 0.4 5
69804 19 23 24 1.763 271.5 0.5 3.6 0.3 5
70492 19 34 52 1.727 271.0 3.2 3.3 0.8 5
71179 19 46 19 1.694 275.0 3.0 3.4 1.3 5
84685 23 31 25 1.619 279.3 1.6 2.4 0.9 5
88401 00 33 21 1.786 281.1 1.4 2.6 0.4 5
97762 03 09 22 3.030 282.8 0.3 1.0 0.2 5
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