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 30 1997 07 30 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 38 007 64.84 147.56 0.0 295.0 5.9 5.1 1.9 60129 16 42 09 2.680 288.9 1.3 1.1 0.4 5 61827 17 10 27 2.381 291.4 2.5 1.8 0.6 5 62342 17 19 02 2.305 290.6 1.4 2.1 0.5 5 63469 17 37 49 2.157 290.1 1.2 2.9 0.3 5 63983 17 46 23 2.097 290.8 1.7 2.9 0.5 5 64497 17 54 57 2.041 290.0 0.5 3.7 0.2 5 66793 18 33 13 1.837 293.1 0.8 3.0 0.1 5 67475 18 44 35 1.787 293.1 2.0 3.7 0.4 5 67990 18 53 10 1.753 292.9 0.9 3.7 0.4 5 68673 19 04 33 1.712 292.9 1.5 4.0 0.4 5 69355 19 15 55 1.675 292.1 2.3 4.5 0.7 5 69869 19 24 29 1.649 291.3 2.3 5.0 0.7 5 71636 19 53 56 1.574 292.5 1.6 5.5 0.4 5 72318 20 05 18 1.550 292.9 1.4 6.1 0.5 5 74838 20 47 18 1.486 295.1 1.5 4.9 0.6 5 75812 21 03 32 1.469 294.2 3.8 5.5 0.9 5 76325 21 12 05 1.463 296.2 1.6 5.7 0.5 5 76972 21 22 52 1.456 271.4 3.2 11.1 0.6 5 77945 21 39 05 1.450 294.5 1.5 6.4 0.4 5 78459 21 47 39 1.448 296.2 1.5 6.2 0.5 5 79141 21 59 01 1.448 295.1 2.2 6.4 0.8 5 80115 22 15 15 1.450 294.9 1.4 6.5 0.4 5 80628 22 23 48 1.453 294.3 2.0 6.8 0.5 5 81310 22 35 10 1.459 294.3 2.0 7.0 0.4 5 82284 22 51 24 1.472 295.9 1.3 6.4 0.6 5 82798 22 59 58 1.480 296.5 0.8 6.7 0.3 5 83478 23 11 18 1.493 296.4 1.6 6.7 0.6 5 84453 23 27 33 1.516 296.1 1.1 6.8 0.2 5 84966 23 36 06 1.530 297.3 2.5 6.8 0.7 5 85649 23 47 29 1.550 296.6 1.7 6.9 0.3 5 87490 00 18 10 1.621 303.1 1.9 4.8 0.4 5 88465 00 34 25 1.668 302.9 2.2 5.3 0.4 5 88979 00 42 59 1.695 304.9 1.5 5.1 0.3 5 89662 00 54 22 1.734 305.2 2.0 5.3 0.7 5 90637 01 10 37 1.798 307.0 2.4 4.8 0.8 5 91843 01 30 43 1.891 300.9 0.6 5.2 0.2 5 92822 01 47 02 1.978 298.9 0.9 5.4 0.3 5 99353 03 35 53 3.032 300.8 1.6 1.2 0.6 5