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 Barber's Point (  19.50,  158.00)
STRAT
1 1
1996 02 07 1996 02 07
0
14
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.


Barber's Point
18 009   19.50  158.00     0.0  265.3   12.3   -2.7    2.0
67974   18 52 54  2.522  264.3     3.2   -2.0     0.9     5
69097   19 11 37  2.190  266.5     1.2   -2.6     0.3     5
69608   19 20 08  2.070  267.8     0.7   -2.9     0.1     5
70967   19 42 47  1.820  268.7     1.1   -2.7     0.4     5
71692   19 54 52  1.717  272.1     1.9   -3.6     0.5     5
72204   20 03 24  1.653  273.3     0.7   -3.8     0.3     5
72928   20 15 28  1.575  273.7     1.9   -4.0     0.5     5
74151   20 35 51  1.469  275.7     1.2   -4.6     0.3     5
75168   20 52 48  1.399  276.6     2.2   -4.5     0.5     5
75678   21 01 18  1.370  276.2     2.7   -4.5     0.6     5
76402   21 13 22  1.334  277.7     1.4   -4.8     0.4     5
87862   00 24 22  1.349  248.1     1.3   -0.5     0.4     5
88876   00 41 16  1.405  238.1     1.8    2.2     0.4     5
89388   00 49 48  1.439  227.7     2.9    4.8     0.7     5
90112   01 01 52  1.493  212.6     2.8    8.6     0.6     5
93081   01 51 21  1.834  255.6     1.7   -1.5     0.6     5
93594   01 59 54  1.921  255.4     1.4   -1.6     0.3     5
97605   03 06 45  3.278  234.2     3.8   -0.2     2.6     5