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 07 1997 08 07
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  257.2    1.9    4.1    0.9
71152   19 45 52  1.663  253.5     3.0    2.1     0.5     5
74283   20 38 03  1.560  256.6     1.1    3.1     0.2     5
79084   21 58 04  1.506  257.1     1.2    4.3     0.5     5
80058   22 14 18  1.509  255.8     1.0    4.9     0.2     5
80572   22 22 52  1.512  256.7     0.7    4.9     0.3     5
81254   22 34 14  1.519  256.1     1.7    5.0     0.6     5
82228   22 50 28  1.533  255.2     1.4    5.6     0.7     5
82742   22 59 02  1.542  255.1     1.0    5.5     0.4     5
85614   23 46 54  1.620  257.2     1.5    4.3     0.5     5
86622   24 03 42  1.659  256.8     0.7    4.5     0.3     5
87782   00 23 02  1.714  258.7     1.3    3.6     0.4     5
88758   00 39 18  1.769  258.5     0.6    3.5     0.2     5
89273   00 47 53  1.801  257.5     1.4    4.0     0.5     5
89956   00 59 16  1.848  259.3     1.2    3.6     0.6     5
90931   01 15 31  1.923  259.0     1.9    3.8     0.7     5
91447   01 24 07  1.967  261.4     1.7    3.6     0.3     5