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 06 1997 07 06 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 41 007 64.84 147.56 0.0 316.0 2.5 6.0 2.1 57905 16 05 05 2.676 317.3 1.3 0.9 0.5 5 59066 16 24 26 2.464 316.9 0.8 1.7 0.2 5 59580 16 33 00 2.381 316.9 0.7 1.8 0.2 5 60094 16 41 34 2.303 316.7 0.8 2.3 0.1 5 61221 17 00 21 2.152 315.6 0.6 2.9 0.2 5 61739 17 08 59 2.090 317.4 1.7 3.1 0.4 5 62254 17 17 34 2.032 317.2 1.2 3.7 0.1 5 64326 17 52 06 1.836 315.7 0.8 3.9 0.3 5 65014 18 03 34 1.782 314.9 1.4 4.7 0.4 5 65533 18 12 13 1.743 313.9 1.9 5.4 0.4 5 66221 18 23 41 1.697 314.4 3.6 5.6 0.6 5 66908 18 35 08 1.654 311.9 0.5 6.3 0.1 5 67427 18 43 47 1.625 311.0 0.6 6.9 0.2 5 68115 18 55 15 1.588 309.4 0.3 7.7 0.2 5 68801 19 06 41 1.555 309.3 0.8 8.0 0.1 5 70581 19 36 21 1.484 317.8 1.5 4.4 0.6 5 71555 19 52 35 1.452 317.1 1.1 5.0 0.7 5 72068 20 01 08 1.437 316.6 1.4 5.2 0.5 5 72749 20 12 29 1.420 316.1 1.7 5.4 0.7 5 73721 20 28 41 1.397 315.9 2.5 5.9 0.8 5 74234 20 37 14 1.388 316.6 1.1 6.0 0.6 5 74914 20 48 34 1.376 315.6 2.0 6.6 0.5 5 75887 21 04 47 1.363 313.5 2.3 7.4 0.8 5 76400 21 13 20 1.358 315.6 2.7 7.1 0.8 5 77081 21 24 41 1.352 314.9 2.3 7.4 0.6 5 78054 21 40 54 1.348 315.6 0.8 7.1 0.3 5 78566 21 49 26 1.347 315.4 2.1 7.3 0.7 5 79247 22 00 47 1.347 313.0 3.0 8.2 0.8 5 80221 22 17 01 1.350 316.1 1.6 7.7 0.4 5 80734 22 25 34 1.353 315.4 2.0 7.9 0.4 5 81414 22 36 54 1.358 316.9 0.5 7.9 0.2 5 82327 22 52 07 1.369 317.2 2.3 8.1 0.4 5 83219 23 06 59 1.382 317.8 0.7 8.2 0.3 5 84193 23 23 13 1.400 317.4 1.7 8.0 0.4 5 84706 23 31 46 1.411 318.8 2.3 8.0 0.7 5 85388 23 43 08 1.428 319.6 2.8 8.0 0.6 5 86369 23 59 29 1.456 319.1 2.8 7.8 0.9 5 86893 00 08 13 1.473 316.7 2.1 8.0 0.4 5 87575 00 19 35 1.497 319.5 2.8 6.9 0.9 5 88555 00 35 55 1.536 315.0 3.1 8.2 1.2 5 93483 01 58 03 1.838 322.8 1.2 3.5 0.3 5