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 06 1997 09 06
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 
18 007   64.84  147.56     0.0  259.0    5.3    2.5    0.9
66108   18 21 48  2.715  253.9     1.0    0.7     0.4     5
67635   18 47 15  2.484  256.0     0.9    1.3     0.3     5
68151   18 55 51  2.420  255.7     0.5    1.3     0.2     5
68666   19 04 26  2.361  255.2     1.2    1.5     0.3     5
69795   19 23 15  2.248  254.3     0.8    2.2     0.3     5
70310   19 31 50  2.204  254.9     0.6    2.4     0.1     5
70824   19 40 24  2.164  254.7     0.4    2.6     0.0     5
71953   19 59 13  2.088  255.2     1.5    3.1     0.2     5
72467   20 07 47  2.059  255.7     0.8    3.1     0.3     5
72982   20 16 22  2.033  256.6     1.1    3.3     0.4     5
74115   20 35 15  1.984  257.8     1.4    3.4     0.5     5
78639   21 50 39  1.906  260.7     0.7    3.1     0.3     5
79619   22 06 59  1.911  261.6     1.0    3.3     0.2     5
80139   22 15 39  1.917  263.0     2.1    3.0     0.6     5
80827   22 27 07  1.928  262.9     0.8    3.2     0.4     5
81808   22 43 28  1.951  264.4     1.3    3.2     0.4     5
82329   22 52 09  1.966  263.8     1.6    3.4     0.5     5
92321   01 38 41  3.009  275.3     1.6    1.2     0.3     5