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 09 1997 08 09 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 28 007 64.84 147.56 0.0 267.7 1.3 4.0 1.1 65805 18 16 45 2.056 269.2 2.4 1.8 1.0 5 68412 19 00 12 1.837 266.8 1.0 2.2 0.4 5 69098 19 11 38 1.793 266.9 1.5 2.5 0.4 5 69617 19 20 17 1.762 267.8 4.0 2.5 1.0 5 70300 19 31 40 1.725 268.7 0.9 2.8 0.5 5 70983 19 43 03 1.692 267.8 1.8 3.5 0.6 5 71497 19 51 37 1.669 267.5 1.5 3.8 0.3 5 72179 20 02 59 1.642 267.8 1.8 3.8 0.5 5 72862 20 14 22 1.618 267.7 1.3 4.1 0.3 5 73376 20 22 56 1.602 267.3 1.3 4.6 0.3 5 74058 20 34 18 1.584 265.7 1.2 5.4 0.2 5 74741 20 45 41 1.567 266.5 1.7 5.4 0.5 5 75255 20 54 15 1.557 265.9 1.9 5.8 0.6 5 79066 21 57 46 1.523 266.2 1.3 4.5 0.3 5 80040 22 14 00 1.526 267.5 2.6 5.1 0.7 5 80554 22 22 34 1.529 265.8 2.3 5.5 0.5 5 81236 22 33 56 1.536 266.3 0.9 5.7 0.4 5 82210 22 50 10 1.550 266.5 1.7 5.5 0.5 5 85011 23 36 51 1.620 268.5 1.4 4.0 0.2 5 85986 23 53 06 1.655 268.8 1.0 4.0 0.5 5 86516 00 01 56 1.677 267.7 0.8 4.4 0.2 5 87199 00 13 19 1.709 267.8 1.4 4.2 0.3 5 88179 00 29 39 1.760 268.0 0.3 3.8 0.2 5 88698 00 38 18 1.790 267.7 1.6 3.6 0.3 5 89385 00 49 45 1.835 270.7 1.3 3.3 0.5 5 90365 01 06 05 1.907 270.7 0.9 3.1 0.3 5 90884 01 14 44 1.950 270.0 1.9 3.4 0.4 5 97927 03 12 07 3.032 267.9 2.6 2.5 1.2 5