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 24 1997 06 24 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 35 007 64.84 147.56 0.0 312.7 4.8 5.4 1.4 63793 17 43 13 1.835 320.4 0.9 2.9 0.2 5 64535 17 55 35 1.775 321.8 1.2 3.0 0.3 5 65074 18 04 34 1.736 319.4 0.9 4.0 0.2 5 65820 18 17 00 1.686 318.6 2.6 4.2 0.8 5 66563 18 29 23 1.640 320.1 1.0 4.3 0.4 5 67102 18 38 22 1.610 320.1 1.7 4.3 0.5 5 67848 18 50 48 1.572 318.5 2.0 4.9 0.5 5 70314 19 31 54 1.468 318.2 0.9 4.7 0.4 5 71362 19 49 22 1.434 316.8 3.7 4.9 0.9 5 71900 19 58 20 1.419 315.7 1.7 5.3 0.5 5 72649 20 10 49 1.400 315.4 1.1 5.5 0.3 5 73697 20 28 17 1.378 313.8 2.0 6.2 0.5 5 74234 20 37 14 1.368 313.0 1.2 6.4 0.4 5 74983 20 49 43 1.356 310.9 4.8 7.3 1.0 5 76031 21 07 11 1.344 310.3 1.3 7.7 0.4 5 76568 21 16 08 1.339 309.4 2.9 8.0 0.9 5 77315 21 28 35 1.334 310.8 1.1 8.0 0.2 5 78363 21 46 03 1.330 311.0 0.8 8.5 0.4 5 82319 22 51 59 1.353 312.7 1.7 5.3 0.6 5 82856 23 00 56 1.361 312.0 1.2 5.8 0.5 5 83604 23 13 24 1.373 311.9 3.0 6.0 0.9 5 84653 23 30 53 1.395 312.4 1.0 6.0 0.3 5 85191 23 39 51 1.407 310.6 1.7 6.2 0.6 5 85939 23 52 19 1.428 312.2 2.4 5.9 0.3 5 87026 00 10 26 1.462 312.4 1.3 5.9 0.2 5 87564 00 19 24 1.481 309.4 1.5 6.4 0.5 5 88311 00 31 51 1.509 311.7 1.4 5.5 0.5 5 90656 01 10 56 1.623 310.0 2.3 4.7 0.7 5 91706 01 28 26 1.686 309.8 1.0 5.4 0.4 5 92245 01 37 25 1.722 308.1 3.7 5.3 1.2 5 92999 01 49 59 1.777 306.1 0.3 5.4 0.2 5 94053 02 07 33 1.862 307.4 1.3 5.1 0.4 5 94598 02 16 38 1.911 307.6 1.4 4.5 0.4 5 95351 02 29 11 1.985 308.7 1.1 4.0 0.4 5 101809 04 16 49 3.048 299.0 0.9 1.8 0.4 5