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 15 1997 09 15
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  264.7    4.4    1.8    0.9
68321   18 58 41  2.707  263.5     1.1    0.4     0.3     5
69973   19 26 13  2.500  265.1     0.6    0.8     0.4     5
70488   19 34 48  2.447  264.4     1.3    1.1     0.5     5
71004   19 43 24  2.399  265.7     0.9    1.0     0.3     5
72132   20 02 12  2.311  264.7     0.9    1.4     0.3     5
72647   20 10 47  2.277  263.9     1.3    1.6     0.4     5
73162   20 19 22  2.246  263.8     1.1    1.8     0.6     5
74289   20 38 09  2.192  262.8     0.3    2.5     0.1     5
74804   20 46 44  2.172  265.5     0.8    1.9     0.4     5
75324   20 55 24  2.155  260.4     4.1    2.9     0.9     5
76451   21 14 11  2.127  261.8     2.2    3.0     0.5     5
76964   21 22 44  2.119  260.4     3.2    3.2     0.6     5
77483   21 31 23  2.114  264.6     2.6    2.7     0.5     5
89994   00 59 54  3.009  279.6     1.2    0.7     0.3     5