22 1001 Viggiano, A 781-377-4208, Ballenthin, J -3755, Hunton, D -4057, Miller, T -5031 Air Force Research Laboratory, AFRL/VSBP, 29 Randolph Rd, Hanscom AFB, MA 01731 Hydrogen Fluoride Concentrations from Chemical Ionization Mass Spectrometer (CIMS) SOLVE Campaign, Hekla Plume Intercept, February 28, 2000. 1 1 2000 02 27 2000 07 31 0 Elapsed Time in UT Seconds from 0 hours on day of flight 1 1 999999 HF concentration (pptv) 1 Dryden - to - Kiruna Transit Flight 6 Final data. Concentrations are based on post-flight lab calibrations. Contact us for details. Similar data are available for some later Hekla plume crossings. Data are unaveraged point measurements taken at time listed. Negative concentrations result from background subtraction, lower sensitivity and small signal counting statistics. UT(sec) HF_ppt 104420 432 104447 45 104474 1399 104500 -601 104527 45 104554 2173 104580 -730 104607 -278 104634 -730 104661 -730 104687 -601 104714 1077 104741 -20 104767 -214 104794 625 104821 -1375 104848 -472 104874 -20 104901 2090 104928 56740 104955 174817 104981 160908 105008 150097 105035 88133 105061 187462 105088 67447 105115 114226 105142 154147 105168 75071 105195 46695 105222 70125 105248 66356 105275 120524 105302 128245 105329 36105 105355 16068 105382 6742 105409 3528 105435 3786 105462 3076 105489 4108 105516 5011