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 05 1997 07 05 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 29 007 64.84 147.56 0.0 332.4 3.9 7.5 3.0 71479 19 51 19 1.451 333.2 3.1 2.8 0.9 5 72098 20 01 38 1.434 332.5 3.4 3.1 1.7 5 73077 20 17 57 1.409 333.4 3.9 2.8 1.0 5 73594 20 26 34 1.398 330.8 3.4 4.3 0.8 5 75252 20 54 12 1.369 332.3 2.3 4.9 0.6 5 75765 21 02 45 1.362 331.3 1.4 5.6 0.5 5 76446 21 14 06 1.355 329.2 1.5 6.4 0.6 5 77420 21 30 20 1.348 328.9 4.8 7.4 0.9 5 77933 21 38 53 1.345 331.7 3.6 7.5 0.9 5 78614 21 50 14 1.345 329.9 1.9 8.6 0.7 5 79127 21 58 47 1.345 330.1 2.0 8.8 0.7 5 80100 22 15 00 1.347 331.0 1.3 9.3 0.5 5 80613 22 23 33 1.350 328.2 1.5 10.4 0.5 5 81294 22 34 54 1.355 328.4 1.6 10.6 0.6 5 82268 22 51 08 1.365 329.1 3.5 10.9 1.0 5 82781 22 59 41 1.373 329.1 1.6 11.6 0.5 5 83468 23 11 08 1.384 325.2 1.8 12.2 0.4 5 84442 23 27 22 1.403 331.4 1.9 11.4 0.6 5 84955 23 35 55 1.415 331.4 1.4 10.9 0.3 5 85637 23 47 17 1.433 330.0 1.4 11.3 0.3 5 86643 24 04 03 1.462 329.2 2.0 11.3 0.6 5 87157 00 12 37 1.479 333.2 3.0 10.6 1.0 5 90368 01 06 08 1.622 338.7 1.6 5.4 0.4 5 91347 01 22 27 1.680 337.6 4.0 5.8 0.8 5 91866 01 31 06 1.713 337.9 1.3 5.6 0.4 5 92554 01 42 34 1.761 339.5 2.6 5.2 0.5 5 93533 01 58 53 1.838 339.7 2.1 4.8 0.5 5 94053 02 07 33 1.883 338.5 1.4 4.6 0.4 5 94741 02 19 01 1.947 338.1 1.9 4.4 0.4 5