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 27 1997 07 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 
13 007   64.84  147.56     0.0  265.6    2.8    3.5    0.9
68276   18 57 56  1.708  264.9     0.5    2.6     0.2     5
70167   19 29 27  1.610  262.8     0.8    3.5     0.1     5
71372   19 49 32  1.561  260.7     3.2    4.4     0.9     5
80770   22 26 10  1.435  261.6     4.2    3.5     1.1     5
84983   23 36 23  1.509  266.1     4.0    4.7     1.1     5
85664   23 47 44  1.529  269.0     3.5    4.5     1.0     5
88037   00 27 17  1.621  269.4     1.6    3.7     0.5     5
89011   00 43 31  1.670  269.7     2.2    3.9     0.3     5
90213   01 03 33  1.740  265.5     2.7    4.2     0.5     5
91193   01 19 53  1.807  264.7     2.7    3.8     0.5     5
92398   01 39 58  1.903  266.3     1.6    3.5     0.5     5
93377   01 56 17  1.994  268.3     4.5    2.6     1.1     5
99719   03 41 59  3.032  263.8     0.8    1.2     0.3     5