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 22 1997 07 22 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 34 007 64.84 147.56 0.0 320.6 3.0 5.4 2.4 66455 18 27 35 1.784 318.1 2.3 1.7 0.9 5 66974 18 36 14 1.748 319.6 3.3 1.6 0.5 5 67662 18 47 42 1.704 315.1 3.7 3.0 1.0 5 68347 18 59 07 1.664 317.4 1.7 3.5 0.4 5 68866 19 07 46 1.637 317.8 1.3 4.9 0.4 5 69553 19 19 13 1.602 320.0 1.9 4.7 0.4 5 70240 19 30 40 1.572 316.8 0.6 5.7 0.2 5 70753 19 39 13 1.552 319.1 1.1 5.8 0.2 5 72769 20 12 49 1.485 320.9 2.1 4.7 0.6 5 73743 20 29 03 1.460 322.2 1.8 5.0 0.5 5 74257 20 37 37 1.449 320.9 3.5 5.5 0.9 5 74938 20 48 58 1.436 320.4 1.4 6.3 0.5 5 75912 21 05 12 1.422 322.5 2.3 5.8 0.9 5 76425 21 13 45 1.416 320.9 2.8 6.2 0.9 5 77104 21 25 04 1.409 321.8 1.7 6.4 0.3 5 78078 21 41 18 1.404 318.4 2.3 7.2 0.7 5 78591 21 49 51 1.403 320.1 1.4 7.2 0.4 5 79273 22 01 13 1.403 320.4 3.3 7.5 0.7 5 80246 22 17 26 1.405 320.6 0.5 7.8 0.2 5 80759 22 25 59 1.408 321.4 3.3 7.8 0.8 5 81441 22 37 21 1.415 319.1 1.5 7.9 0.5 5 82414 22 53 34 1.426 317.5 1.6 8.1 0.5 5 82927 23 02 07 1.434 318.9 0.7 7.7 0.4 5 83609 23 13 29 1.447 317.8 1.2 8.3 0.2 5 84582 23 29 42 1.468 318.4 1.0 7.9 0.6 5 85095 23 38 15 1.482 318.0 1.4 8.1 0.4 5 85777 23 49 37 1.501 320.3 2.8 7.7 0.9 5 86783 24 06 23 1.535 319.5 2.3 8.0 0.7 5 88805 00 40 05 1.621 327.1 2.0 3.1 0.3 5 90303 01 05 03 1.704 328.1 3.1 1.5 1.7 5 91970 01 32 50 1.818 324.2 1.1 2.7 0.4 5 92489 01 41 29 1.859 325.2 0.5 2.7 0.3 5 93177 01 52 57 1.919 327.1 1.7 2.3 0.4 5 100268 03 51 08 3.031 323.1 0.9 0.2 0.4 5