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 08 1996 02 08
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
33 009   19.50  158.00     0.0  273.7    3.8   -3.7    0.8
68466   19 01 06  2.350  265.5     0.8   -2.3     0.2     5
68977   19 09 37  2.208  266.5     0.9   -2.5     0.3     5
69488   19 18 08  2.086  267.3     0.8   -2.7     0.3     5
70889   19 41 29  1.824  268.4     0.6   -2.5     0.2     5
71614   19 53 34  1.719  272.4     1.9   -3.3     0.5     5
72125   20 02 05  1.655  272.3     0.9   -3.4     0.2     5
72854   20 14 14  1.577  273.7     1.2   -4.2     0.2     5
74079   20 34 39  1.469  275.5     1.5   -4.2     0.4     5
75094   20 51 34  1.398  277.8     0.8   -4.5     0.2     5
75605   21 00 05  1.369  277.4     1.9   -4.5     0.6     5
76329   21 12 09  1.332  279.2     1.3   -4.7     0.5     5
77977   21 39 37  1.269  277.2     1.2   -4.3     0.4     5
78487   21 48 07  1.255  276.7     2.4   -4.0     0.6     5
78996   21 56 36  1.243  275.7     1.4   -3.8     0.4     5
79505   22 05 05  1.233  277.5     1.6   -4.4     0.4     5
80416   22 20 16  1.219  275.5     1.1   -4.0     0.4     5
80927   22 28 47  1.215  276.4     0.9   -4.2     0.3     5
81435   22 37 15  1.212  275.5     1.5   -4.0     0.2     5
81943   22 45 43  1.211  273.4     0.5   -3.6     0.1     5
82671   22 57 51  1.212  275.7     1.5   -3.9     0.2     5
84717   23 31 57  1.237  278.4     1.7   -4.7     0.4     5
85981   23 53 01  1.269  277.0     1.6   -4.3     0.3     5
86522   00 02 02  1.292  277.5     1.3   -4.8     0.2     5
87036   00 10 36  1.306  275.2     1.1   -4.2     0.4     5
87976   00 26 16  1.349  272.9     0.8   -3.7     0.1     5
88991   00 43 11  1.406  274.8     1.5   -3.7     0.3     5
89501   00 51 41  1.440  274.0     1.8   -3.6     0.4     5
90227   01 03 47  1.496  273.2     0.5   -3.4     0.1     5
91742   01 29 02  1.644  271.0     1.0   -2.8     0.2     5
92758   01 45 58  1.776  269.9     1.1   -2.5     0.1     5
93269   01 54 29  1.855  268.3     0.9   -1.9     0.2     5
94000   02 06 40  1.987  267.9     0.4   -2.3     0.2     5
97650   03 07 30  3.280  260.5     1.1   -1.8     0.2     5