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 07 21 1997 07 21
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  324.0    5.4    6.0    3.1
76220   21 10 20  1.413  317.7     3.8    6.1     0.9     5
76906   21 21 46  1.406  318.4     3.6    6.4     0.8     5
80805   22 26 45  1.404  320.4     1.0    7.9     0.4     5
82462   22 54 22  1.422  321.0     0.9    8.7     0.4     5
82975   23 02 55  1.430  321.3     1.3    8.9     0.4     5
83658   23 14 18  1.443  320.7     1.0    9.1     0.2     5
84631   23 30 31  1.465  320.5     1.8    9.1     0.4     5
85145   23 39 05  1.478  321.4     1.1    9.1     0.2     5
85831   23 50 31  1.498  316.5     3.8    9.7     0.9     5
86837   24 07 17  1.531  319.2     2.1    9.5     0.4     5
89924   00 58 44  1.674  328.9     1.2    3.3     0.5     5
90443   01 07 23  1.705  333.0     0.9    2.5     0.4     5
91130   01 18 50  1.749  331.6     0.4    2.6     0.2     5
92110   01 35 10  1.821  330.0     1.6    2.9     0.4     5
92629   01 43 49  1.862  329.2     2.2    2.8     0.5     5
93317   01 55 17  1.922  330.3     2.4    2.4     0.3     5
100368   03 52 48  3.031  327.7     0.9    0.8     0.3     5