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 19 1997 08 19 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 33 007 64.84 147.56 0.0 297.3 3.3 4.1 1.7 63063 17 31 03 2.658 306.2 0.9 0.5 0.5 5 64157 17 49 17 2.469 306.6 1.3 0.9 0.3 5 64673 17 57 53 2.392 304.8 0.7 1.4 0.3 5 65187 18 06 27 2.321 303.0 1.6 1.4 0.3 5 66314 18 25 14 2.184 300.3 0.5 2.3 0.2 5 66829 18 33 49 2.129 299.9 1.5 2.5 0.4 5 67343 18 42 23 2.078 299.1 1.3 2.7 0.3 5 68474 19 01 14 1.980 297.7 0.9 3.4 0.3 5 70559 19 35 59 1.839 297.2 0.9 2.6 0.3 5 71242 19 47 22 1.803 296.4 2.8 3.2 0.6 5 71756 19 55 56 1.778 296.2 1.0 3.6 0.4 5 72439 20 07 19 1.748 296.9 0.6 3.7 0.3 5 73121 20 18 41 1.722 295.2 0.8 4.1 0.2 5 73636 20 27 16 1.705 296.7 1.3 4.1 0.6 5 74319 20 38 39 1.685 293.9 1.9 4.9 0.6 5 75001 20 50 01 1.668 297.3 0.6 4.5 0.4 5 75516 20 58 36 1.657 294.3 0.5 5.1 0.2 5 76198 21 09 58 1.645 295.2 2.3 5.1 0.5 5 76880 21 21 20 1.636 296.3 1.5 5.1 0.3 5 77395 21 29 55 1.632 296.8 1.6 5.1 0.3 5 78950 21 55 50 1.626 295.3 1.7 5.7 0.6 5 79924 22 12 04 1.629 295.1 2.1 5.9 0.5 5 80438 22 20 38 1.634 296.2 1.2 5.7 0.6 5 81121 22 32 01 1.641 296.5 2.1 6.0 0.8 5 82095 22 48 15 1.657 296.0 3.9 5.6 1.2 5 82609 22 56 49 1.669 294.8 1.6 5.8 0.6 5 83291 23 08 11 1.685 296.5 1.2 5.5 0.3 5 84271 23 24 31 1.715 294.5 0.9 5.7 0.4 5 84790 23 33 10 1.734 294.4 1.1 5.5 0.3 5 85476 23 44 36 1.761 295.0 1.4 5.4 0.3 5 86461 24 01 01 1.808 295.8 1.3 5.5 0.5 5 86982 00 09 42 1.836 294.4 1.1 5.5 0.3 5 96204 02 43 24 3.029 297.8 1.3 1.3 0.3 5