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 06 30 1997 06 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 36 007 64.84 147.56 0.0 313.1 5.6 5.4 1.5 64923 18 02 03 1.763 307.1 1.5 3.5 0.6 5 65139 18 05 39 1.747 306.8 2.0 3.5 0.4 5 67895 18 51 35 1.581 307.1 1.8 5.1 0.5 5 68581 19 03 01 1.548 307.0 1.0 5.9 0.3 5 70149 19 29 09 1.483 308.2 3.4 4.9 0.8 5 71128 19 45 28 1.450 308.7 2.0 5.0 0.5 5 71646 19 54 06 1.435 309.0 0.7 5.1 0.2 5 72333 20 05 33 1.416 308.6 1.3 5.3 0.5 5 73311 20 21 51 1.393 308.3 1.6 5.6 0.5 5 73829 20 30 29 1.382 307.0 2.5 6.1 0.7 5 74513 20 41 53 1.370 307.5 0.4 6.2 0.2 5 75491 20 58 11 1.356 306.6 0.8 7.0 0.2 5 76009 21 06 49 1.350 308.0 0.9 6.9 0.3 5 76695 21 18 15 1.344 308.2 0.4 7.1 0.2 5 77672 21 34 32 1.338 307.1 2.5 8.0 0.4 5 78190 21 43 10 1.337 308.0 2.2 7.8 0.4 5 80796 22 26 36 1.342 312.5 1.6 6.0 0.4 5 81773 22 42 53 1.351 314.9 4.1 5.6 1.0 5 82291 22 51 31 1.358 311.8 1.6 6.4 0.4 5 82977 23 02 57 1.367 313.5 3.0 6.1 0.8 5 83955 23 19 15 1.385 310.9 3.3 6.8 1.0 5 84473 23 27 53 1.395 313.7 1.1 6.4 0.3 5 85159 23 39 19 1.412 314.7 1.0 5.9 0.4 5 86138 23 55 38 1.438 315.5 0.9 6.0 0.3 5 86681 00 04 41 1.455 315.2 2.7 6.4 0.7 5 87367 00 16 07 1.478 316.4 3.2 6.3 0.7 5 88346 00 32 26 1.516 318.5 3.1 5.5 0.7 5 88865 00 41 05 1.538 319.5 2.9 5.6 0.9 5 90561 01 09 21 1.622 321.1 1.8 4.1 0.7 5 91546 01 25 46 1.681 322.4 3.5 3.4 1.0 5 92066 01 34 26 1.715 316.8 0.8 4.9 0.4 5 92753 01 45 53 1.764 320.5 2.6 3.9 0.7 5 93734 02 02 14 1.841 321.0 3.0 3.7 0.8 5 94253 02 10 53 1.886 323.8 2.6 2.8 0.6 5 94941 02 22 21 1.950 322.3 1.3 3.1 0.4 5 101646 04 14 06 3.026 321.9 3.8 1.0 1.9 5