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 08 1997 09 08
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  289.6    2.7    3.5    1.4
66725   18 32 05  2.685  289.5     2.0    0.8     0.5     5
68106   18 55 06  2.487  288.5     1.9    1.9     0.5     5
68621   19 03 41  2.425  289.8     1.4    1.8     0.5     5
69136   19 12 16  2.368  290.0     0.9    1.9     0.2     5
70263   19 31 03  2.260  288.4     1.9    3.0     0.7     5
70778   19 39 38  2.217  288.8     0.3    3.0     0.3     5
71293   19 48 13  2.179  289.1     1.2    3.4     0.5     5
72419   20 06 59  2.107  288.4     0.9    3.8     0.3     5
72934   20 15 34  2.080  288.8     2.8    4.0     0.5     5
73449   20 24 09  2.055  287.2     1.6    4.4     0.4     5
74576   20 42 56  2.010  287.9     2.1    4.9     0.3     5
75096   20 51 36  1.994  286.4     1.2    5.4     0.3     5
75616   21 00 16  1.981  286.5     1.1    5.6     0.3     5
78595   21 49 55  1.947  292.1     1.6    3.7     0.4     5
79575   22 06 15  1.952  291.4     0.9    4.4     0.3     5
80095   22 14 55  1.958  290.9     0.9    4.6     0.3     5
80783   22 26 23  1.970  291.2     0.3    4.6     0.1     5
91820   01 30 20  3.006  298.7     0.8    1.2     0.4     5