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 14 1997 05 14
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 
12 007   64.84  147.56     0.0  357.9    4.2    0.5    0.9
59453   16 30 53  2.657  362.5     2.9   -1.3     0.8     5
60566   16 49 26  2.455  357.0     0.7   -0.3     0.2     5
61104   16 58 24  2.369  355.8     1.7    0.1     0.4     5
61637   17 07 17  2.291  353.4     0.9    0.6     0.3     5
62859   17 27 39  2.133  354.3     1.5    0.4     0.5     5
63392   17 36 32  2.072  353.9     1.0    0.5     0.2     5
63925   17 45 25  2.016  351.7     0.9    1.1     0.3     5
88865   00 41 05  1.702  358.6     1.0    1.8     0.7     5
89599   00 53 19  1.747  362.9     2.5    0.0     0.9     5
90631   01 10 31  1.818  365.9     3.9   -0.1     1.4     5
91173   01 19 33  1.860  358.5     0.9    2.0     0.2     5
91906   01 31 46  1.921  360.8     3.1    1.7     0.8     5