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 11 1997 05 11
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 
16 007   64.84  147.56     0.0  386.6    5.6    1.0    1.4
59758   16 35 58  2.671  388.3     3.3   -1.1     1.1     5
60936   16 55 36  2.456  386.7     4.6   -0.8     1.2     5
61466   17 04 26  2.372  385.0     3.9   -0.3     0.9     5
61996   17 13 16  2.294  387.0     2.0   -0.2     0.7     5
64267   17 51 07  2.022  388.1     4.3   -0.7     1.5     5
66392   18 26 32  1.836  391.9     3.4   -0.3     1.0     5
67128   18 38 48  1.784  387.4     2.2    0.4     0.8     5
69138   19 12 18  1.666  393.5     2.9    1.0     1.1     5
69673   19 21 13  1.640  392.1     1.5    1.7     0.6     5
70410   19 33 30  1.608  387.3     1.6    2.9     0.5     5
71146   19 45 46  1.579  390.8     0.4    2.1     0.7     5
76978   21 22 58  1.459  388.4     1.6    1.9     0.4     5
80866   22 27 46  1.467  388.1     3.4    0.9     1.0     5
81898   22 44 58  1.482  382.3     0.8    2.5     0.5     5
84736   23 32 16  1.547  380.0     2.2    2.6     0.6     5
86535   00 02 15  1.613  369.2     1.9    3.6     0.3     5