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 07 29 1997 07 29 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 36 007 64.84 147.56 0.0 290.7 3.4 4.6 1.6 63854 17 44 14 2.097 281.9 4.8 0.7 1.1 5 66647 18 30 47 1.837 284.3 1.5 2.4 0.5 5 67330 18 42 10 1.787 284.5 1.1 2.7 0.3 5 67844 18 50 44 1.753 285.3 2.1 2.7 0.6 5 68527 19 02 07 1.711 285.0 1.6 3.2 0.5 5 69211 19 13 31 1.673 287.0 1.6 3.4 0.4 5 69725 19 22 05 1.647 288.0 1.3 3.8 0.4 5 70406 19 33 26 1.615 288.6 0.8 4.0 0.3 5 71089 19 44 49 1.587 289.1 1.2 4.5 0.3 5 71603 19 53 23 1.567 290.5 2.6 4.6 0.6 5 74507 20 41 47 1.486 294.1 1.6 4.2 0.5 5 75481 20 58 01 1.468 292.9 1.3 4.9 0.4 5 75995 21 06 35 1.460 293.1 0.8 4.8 0.5 5 76676 21 17 56 1.452 291.2 1.5 5.2 0.4 5 77650 21 34 10 1.445 290.0 0.4 5.6 0.3 5 78163 21 42 43 1.442 291.9 1.9 5.6 0.3 5 78844 21 54 04 1.441 290.9 2.0 5.9 0.6 5 79358 22 02 38 1.441 292.3 1.2 5.8 0.3 5 80332 22 18 52 1.445 291.1 0.6 6.4 0.4 5 80845 22 27 25 1.448 291.8 2.0 5.9 0.4 5 81527 22 38 47 1.455 292.2 1.6 5.8 0.3 5 82501 22 55 01 1.468 289.8 1.4 6.6 0.4 5 83014 23 03 34 1.477 289.7 1.8 6.8 0.6 5 83696 23 14 56 1.491 290.5 1.4 6.5 0.6 5 84670 23 31 10 1.514 289.1 1.0 7.0 0.4 5 85184 23 39 44 1.528 290.0 1.2 7.2 0.2 5 85865 23 51 05 1.550 289.6 1.1 7.0 0.4 5 87680 00 21 20 1.621 292.8 1.6 4.7 0.4 5 88654 00 37 34 1.668 295.3 2.0 4.1 0.8 5 89169 00 46 09 1.696 292.9 2.1 4.7 0.6 5 89850 00 57 30 1.736 293.7 1.5 4.2 0.3 5 90825 01 13 45 1.801 296.6 2.1 3.6 0.7 5 91340 01 22 20 1.839 294.6 3.6 3.7 0.7 5 92022 01 33 42 1.894 296.3 0.8 3.6 0.2 5 93003 01 50 03 1.982 294.3 1.0 3.3 0.3 5 99477 03 37 57 3.032 293.9 0.8 0.8 0.1 5