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 05 1997 08 05
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 
15 007   64.84  147.56     0.0  238.7    1.9    4.1    1.6
65251   18 07 31  2.049  239.1     1.8    1.5     0.2     5
67714   18 48 34  1.837  236.2     2.4    2.8     1.6     5
68401   19 00 01  1.790  241.3     4.1    2.0     1.2     5
68920   19 08 40  1.758  237.9     1.2    2.8     0.3     5
69606   19 20 06  1.719  238.3     1.9    3.5     0.6     5
70294   19 31 34  1.683  241.1     1.4    3.0     0.2     5
71500   19 51 40  1.630  238.3     1.0    3.8     0.4     5
72185   20 03 05  1.604  237.1     1.2    4.2     0.4     5
74077   20 34 37  1.548  237.2     1.6    4.7     0.7     5
80084   22 14 44  1.493  238.2     1.8    5.0     0.4     5
80602   22 23 22  1.496  238.0     3.2    5.1     0.7     5
81288   22 34 48  1.503  241.3     3.3    5.0     0.5     5
82266   22 51 06  1.516  239.0     2.0    5.3     0.5     5
82785   22 59 45  1.525  241.8     2.0    4.7     0.5     5
83472   23 11 12  1.539  235.1     2.5    8.2     2.7     5