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 09 14 1997 09 14
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 first line in the data 
table.


Fairbanks 
14 007   64.84  147.56     0.0  256.4    1.8    2.5    1.1
67894   18 51 34  2.731  257.6     1.3    0.7     0.3     5
69679   19 21 19  2.497  256.8     0.9    1.3     0.2     5
70195   19 29 55  2.444  256.2     1.5    1.6     0.5     5
70710   19 38 30  2.394  256.8     0.9    1.5     0.2     5
71839   19 57 19  2.302  256.2     0.6    2.1     0.3     5
72354   20 05 54  2.267  256.0     1.4    2.3     0.4     5
72868   20 14 28  2.235  254.7     0.6    2.8     0.1     5
73996   20 33 16  2.177  256.8     0.3    2.5     0.1     5
74511   20 41 51  2.156  256.1     1.1    3.1     0.3     5
75026   20 50 26  2.138  256.4     0.9    3.3     0.2     5
76154   21 09 14  2.108  254.8     1.0    3.8     0.2     5
76668   21 17 48  2.098  255.0     1.0    3.9     0.3     5
77183   21 26 23  2.091  254.0     1.3    4.3     0.3     5
90197   01 03 17  2.994  262.0     1.2    1.5     0.2     5