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 05 06 1997 05 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 35 007 64.84 147.56 0.0 371.9 4.6 1.5 1.5 60423 16 47 03 2.676 369.0 1.2 -1.6 0.3 5 61630 17 07 10 2.457 367.1 0.8 -0.3 0.3 5 62166 17 16 06 2.373 367.4 1.7 0.0 0.3 5 62699 17 24 59 2.295 366.4 1.3 -0.1 0.5 5 63916 17 45 16 2.140 367.7 1.2 0.6 0.2 5 64448 17 54 08 2.081 367.8 1.5 0.7 0.3 5 64980 18 03 00 2.027 367.6 1.5 1.0 0.4 5 67219 18 40 19 1.837 370.2 0.5 0.9 0.2 5 67958 18 52 38 1.786 369.8 0.6 1.5 0.1 5 68495 19 01 35 1.753 368.9 1.3 1.7 0.3 5 69233 19 13 53 1.711 369.1 2.7 1.7 0.5 5 69973 19 26 13 1.675 366.0 2.2 2.5 0.5 5 70504 19 35 04 1.650 370.4 0.9 2.4 0.3 5 71239 19 47 19 1.620 368.3 2.5 3.0 0.7 5 71972 19 59 32 1.594 368.8 1.7 3.2 0.8 5 72503 20 08 23 1.577 369.1 2.3 3.6 0.5 5 73237 20 20 37 1.557 369.2 2.7 4.0 0.9 5 146847 16 47 27 2.671 370.5 1.2 -1.2 0.3 5 148026 17 07 06 2.458 370.9 1.1 -0.1 0.3 5 148557 17 15 57 2.374 371.2 0.7 0.0 0.2 5 149089 17 24 49 2.297 371.3 0.8 0.4 0.3 5 150312 17 45 12 2.141 372.0 1.6 0.9 0.5 5 150844 17 54 04 2.082 371.6 1.1 1.5 0.4 5 151376 18 02 56 2.027 372.4 1.5 1.6 0.6 5 153619 18 40 19 1.837 377.0 1.2 0.8 0.4 5 154357 18 52 37 1.786 376.2 1.2 1.7 0.2 5 154894 19 01 34 1.753 376.5 1.0 1.8 0.4 5 155632 19 13 52 1.712 376.7 0.8 2.3 0.1 5 156371 19 26 11 1.675 377.2 1.0 2.6 0.2 5 156908 19 35 08 1.650 376.3 0.5 3.0 0.3 5 157645 19 47 25 1.620 376.9 1.2 3.5 0.3 5 158381 19 59 41 1.594 377.2 1.3 3.8 0.4 5 158918 20 08 38 1.577 376.0 2.6 4.4 0.7 5 159657 20 20 57 1.555 377.5 0.8 4.7 0.2 5 164944 21 49 04 1.491 386.1 1.2 2.7 0.3 5