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 10 1997 07 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 
11 007   64.84  147.56     0.0  334.8    1.9    5.9    1.7
72478   20 07 58  1.439  339.1     3.9    2.0     0.8     5
74136   20 35 36  1.401  336.6     3.0    3.9     1.1     5
76313   21 11 53  1.369  336.1     3.0    5.6     1.0     5
76826   21 20 26  1.365  333.5     1.1    6.3     0.5     5
77507   21 31 47  1.360  333.4     2.3    6.9     0.5     5
78480   21 48 00  1.357  332.3     3.2    7.7     1.0     5
78993   21 56 33  1.357  334.1     1.1    7.2     0.3     5
79205   22 00 05  1.357  334.1     2.1    7.5     0.6     5
85737   23 48 57  1.448  334.9     2.3    6.2     0.6     5
86742   24 05 42  1.479  332.8     1.8    7.2     1.3     5
90066   01 01 06  1.623  335.8     4.4    4.1     1.8     5