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 07 04 1997 07 04
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 
12 007   64.84  147.56     0.0  318.0    4.9    4.2    1.8
57663   16 01 03  2.689  314.1     1.2    1.5     0.4     5
58892   16 21 32  2.464  314.1     0.7    2.7     0.3     5
59406   16 30 06  2.381  313.4     0.9    3.0     0.4     5
59920   16 38 40  2.303  315.2     1.7    3.0     0.4     5
61044   16 57 24  2.152  315.8     1.0    3.6     0.1     5
61562   17 06 02  2.090  317.6     1.3    3.6     0.4     5
62076   17 14 36  2.032  316.8     1.2    4.1     0.2     5
64146   17 49 06  1.836  316.1     2.4    3.6     0.7     5
64833   18 00 33  1.781  314.6     2.5    4.4     0.6     5
83638   23 13 58  1.383  325.0     2.2    7.0     0.6     5
84611   23 30 11  1.403  327.1     1.7    6.9     0.6     5
85124   23 38 44  1.416  326.4     2.9    7.2     0.9     5