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 12 1997 08 12
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  293.4    2.0    3.4    1.8
61860   17 11 00  2.682  294.7     0.4    0.7     0.1     5
63062   17 31 02  2.467  295.9     1.0    1.0     0.4     5
63582   17 39 42  2.386  294.2     0.7    1.7     0.2     5
64095   17 48 15  2.312  292.9     1.7    2.2     0.5     5
65221   18 07 01  2.170  293.3     1.1    2.2     0.3     5
69675   19 21 15  1.795  291.8     2.3    3.0     0.6     5
70194   19 29 54  1.766  290.6     2.3    3.5     0.7     5
83948   23 19 08  1.619  295.1     3.4    4.2     0.6     5
84931   23 35 31  1.650  295.2     4.5    4.9     1.6     5
85444   23 44 04  1.668  295.1     3.0    5.5     1.2     5
86133   23 55 33  1.696  292.8     3.2    5.5     0.7     5
87147   00 12 27  1.743  288.9     2.0    6.5     0.5     5