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 07 1997 09 07
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 
16 007   64.84  147.56     0.0  283.7    2.7    3.4    1.0
66297   18 24 57  2.720  285.0     1.2    1.1     0.3     5
67864   18 51 04  2.486  283.3     0.7    2.1     0.4     5
68380   18 59 40  2.422  283.4     1.1    2.2     0.4     5
68895   19 08 15  2.365  283.0     0.4    2.4     0.3     5
70022   19 27 02  2.254  282.6     1.1    3.1     0.3     5
70537   19 35 37  2.211  281.8     1.0    3.3     0.3     5
71052   19 44 12  2.171  281.1     0.5    3.7     0.3     5
72179   20 02 59  2.098  281.9     1.1    4.0     0.5     5
72694   20 11 34  2.069  280.3     1.4    4.5     0.3     5
73209   20 20 09  2.043  281.2     1.5    4.5     0.3     5
74336   20 38 56  1.997  282.1     0.6    4.8     0.3     5
74856   20 47 36  1.980  282.0     0.6    5.0     0.3     5
78612   21 50 12  1.926  288.8     0.7    2.9     0.3     5
79586   22 06 26  1.931  288.1     1.5    3.2     0.3     5
80796   22 26 36  1.948  286.2     0.8    3.7     0.4     5
81776   22 42 56  1.972  288.7     2.2    3.7     0.4     5