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 10 1997 08 10
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  270.1    6.4    2.8    0.9
61595   17 06 35  2.677  268.3     1.0    0.9     0.4     5
62769   17 26 09  2.466  262.6     2.5    2.3     0.9     5
63282   17 34 42  2.386  263.0     2.6    2.7     0.6     5
63801   17 43 21  2.311  265.0     1.3    2.8     0.4     5
64927   18 02 07  2.168  265.6     1.0    3.1     0.4     5
65441   18 10 41  2.110  264.4     1.1    3.6     0.3     5
65956   18 19 16  2.057  265.3     1.4    3.8     0.3     5
68598   19 03 18  1.838  268.0     0.9    3.4     0.4     5
69285   19 14 45  1.793  268.8     1.4    3.6     0.4     5
69804   19 23 24  1.763  271.5     0.5    3.6     0.3     5
70492   19 34 52  1.727  271.0     3.2    3.3     0.8     5
71179   19 46 19  1.694  275.0     3.0    3.4     1.3     5
84685   23 31 25  1.619  279.3     1.6    2.4     0.9     5
88401   00 33 21  1.786  281.1     1.4    2.6     0.4     5
97762   03 09 22  3.030  282.8     0.3    1.0     0.2     5