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 25 1997 08 25
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 
18 007   64.84  147.56     0.0  292.7    3.9    3.2    1.4
63840   17 44 00  2.703  298.7     1.7    0.5     0.6     5
65195   18 06 35  2.473  296.2     1.4    1.7     0.5     5
65710   18 15 10  2.399  297.7     1.3    1.5     0.5     5
66225   18 23 45  2.331  297.1     1.2    1.6     0.4     5
67351   18 42 31  2.200  295.9     1.8    2.2     0.4     5
67871   18 51 11  2.147  298.8     2.0    1.5     0.6     5
69514   19 18 34  2.007  292.3     2.1    3.2     0.5     5
72316   20 05 16  1.841  294.1     1.3    3.2     0.1     5
73004   20 16 44  1.811  287.4     1.8    4.3     0.4     5
73518   20 25 18  1.792  291.6     1.1    3.8     0.2     5
74201   20 36 41  1.770  291.3     1.1    4.1     0.4     5
75408   20 56 48  1.739  287.3     4.7    5.2     1.2     5
76090   21 08 10  1.725  291.5     0.9    4.6     0.4     5
77985   21 39 45  1.705  290.5     3.5    3.6     1.1     5
79869   22 11 09  1.708  290.3     3.0    2.7     1.7     5
80387   22 19 47  1.713  289.0     1.7    5.0     0.5     5
81075   22 31 15  1.721  285.5     3.7    5.3     1.0     5
86980   00 09 40  1.943  292.9     1.4    3.1     0.5     5