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 (  21.31,  158.07)
STRAT
1 1
1995 11 06 1995 11 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
18 009   21.31  158.07     0.0  304.9    6.8   -3.2    0.9
67048   18 37 28  2.351  293.7     0.8   -1.9     0.3     5
67559   18 45 59  2.215  293.8     0.8   -1.8     0.2     5
68070   18 54 30  2.097  295.9     0.9   -2.2     0.2     5
69583   19 19 43  1.825  298.7     1.0   -2.1     0.4     5
71444   19 50 44  1.600  304.0     1.2   -3.1     0.3     5
71955   19 59 15  1.553  304.3     1.5   -3.1     0.3     5
72905   20 15 05  1.478  305.1     1.7   -3.2     0.3     5
73920   20 32 00  1.414  309.1     1.6   -3.9     0.6     5
74431   20 40 31  1.387  309.2     0.8   -3.9     0.2     5
76176   21 09 36  1.316  306.5     2.6   -3.3     0.7     5
76684   21 18 04  1.301  307.8     4.8   -3.6     1.1     5
79352   22 02 32  1.257  311.9     4.5   -4.1     1.0     5
82067   22 47 47  1.269  312.5     1.8   -4.2     0.3     5
83084   23 04 44  1.288  311.4     2.4   -3.9     0.6     5
83596   23 13 16  1.301  311.3     1.3   -4.0     0.3     5
84989   23 36 29  1.347  309.8     0.9   -3.8     0.2     5
86016   23 53 36  1.395  310.3     1.5   -3.7     0.4     5
86541   00 02 21  1.424  307.5     3.5   -2.9     0.9     5