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 22 1997 08 22
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 
17 007   64.84  147.56     0.0  298.0    2.6    3.5    1.5
63413   17 36 53  2.686  298.7     1.1    0.9     0.3     5
64664   17 57 44  2.471  297.1     0.5    1.7     0.2     5
65179   18 06 19  2.395  296.8     1.1    2.1     0.5     5
65694   18 14 54  2.325  297.1     0.7    2.1     0.3     5
66821   18 33 41  2.191  295.0     1.1    3.2     0.4     5
67336   18 42 16  2.138  295.7     0.7    3.5     0.2     5
67850   18 50 50  2.088  295.4     1.7    3.7     0.5     5
68977   19 09 37  1.993  295.0     0.5    4.4     0.2     5
71372   19 49 32  1.840  300.9     1.8    3.4     0.4     5
72055   20 00 55  1.807  300.6     1.3    3.9     0.5     5
72570   20 09 30  1.784  299.6     0.5    4.4     0.3     5
73252   20 20 52  1.758  298.3     0.9    4.9     0.4     5
73935   20 32 15  1.735  300.5     1.3    4.6     0.6     5
74450   20 40 50  1.720  298.4     2.3    5.1     0.4     5
75132   20 52 12  1.703  298.1     0.9    5.0     0.3     5
77711   21 35 11  1.666  294.4     1.4    5.8     0.5     5
95620   02 33 40  3.024  304.4     2.4    0.4     0.6     5