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 31 1997 07 31
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  296.1    2.4    2.9    0.9
60198   16 43 18  2.691  298.0     0.5    1.1     0.1     5
61430   17 03 50  2.464  294.3     1.2    2.5     0.3     5
61949   17 12 29  2.381  296.5     0.2    2.4     0.3     5
62464   17 21 04  2.305  298.6     2.2    2.4     1.1     5
63597   17 39 57  2.157  294.6     4.4    3.6     1.4     5
75208   20 53 28  1.486  301.7     2.3    2.0     0.6     5
82740   22 59 00  1.486  297.2     2.3    2.8     0.7     5
89484   00 51 24  1.734  295.8     1.6    2.7     0.4     5
90462   01 07 42  1.797  294.4     1.5    3.6     0.3     5
90981   01 16 21  1.835  292.4     1.4    4.3     0.4     5
91668   01 27 48  1.888  294.3     0.3    4.1     0.1     5
92648   01 44 08  1.975  295.0     2.4    3.7     0.8     5