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 06 1996 02 06
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
17 009   19.50  158.00     0.0  271.8   11.4   -2.4    2.0
76723   21 18 43  1.325  277.2     1.6   -1.3     0.3     5
76960   21 22 40  1.315  277.4     1.4   -1.3     0.3     5
78458   21 47 38  1.265  279.2     1.0   -3.9     0.4     5
78965   21 56 05  1.253  278.5     1.6   -3.7     0.4     5
79944   22 12 24  1.235  279.5     1.2   -4.1     0.3     5
80849   22 27 29  1.224  279.0     0.9   -4.0     0.3     5
81358   22 35 58  1.221  279.0     1.0   -3.9     0.2     5
82870   23 01 10  1.223  277.0     1.2   -3.5     0.3     5
84122   23 22 02  1.236  275.9     1.3   -3.5     0.3     5
84627   23 30 27  1.245  271.4     4.6   -2.6     1.0     5
85133   23 38 53  1.256  273.3     0.5   -3.1     0.2     5
85638   23 47 18  1.269  271.6     0.9   -3.0     0.2     5
86586   00 03 06  1.299  262.7     1.0   -1.6     0.3     5
87746   00 22 26  1.349  253.4     1.1    0.1     0.3     5
88755   00 39 15  1.403  250.3     4.0    1.5     0.6     5
89266   00 47 46  1.436  241.6     0.3    2.7     0.2     5
91616   01 26 56  1.646  197.0     4.2   12.5     1.1     5