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 27 1997 08 27
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  306.6    2.5    4.1    1.6
70387   19 33 07  1.982  309.6     0.7    2.0     0.2     5
73740   20 29 00  1.815  309.2     0.7    2.7     0.2     5
74260   20 37 40  1.798  312.1     0.9    2.1     0.3     5
74947   20 49 07  1.779  308.9     0.9    3.0     0.4     5
75633   21 00 33  1.763  306.6     0.7    4.0     0.3     5
76158   21 09 18  1.754  305.7     1.6    4.3     0.4     5
76845   21 20 45  1.743  303.0     1.3    5.1     0.4     5
77532   21 32 12  1.737  305.1     1.5    4.5     0.3     5
78051   21 40 51  1.734  302.3     1.3    5.6     0.3     5
78734   21 52 14  1.733  307.0     1.0    5.0     0.4     5
78945   21 55 45  1.733  305.9     1.7    5.4     0.5     5
79920   22 12 00  1.738  305.6     0.6    5.7     0.3     5
80434   22 20 34  1.743  304.9     3.4    6.0     0.6     5
81123   22 32 03  1.752  305.7     1.9    5.8     0.6     5
94601   02 16 41  3.020  306.8     0.8    0.7     0.3     5