27 1001 Anderson,J.G., Wennberg,P.O., Cohen,R.C. Harvard University, Cambridge, MA 02138, Tel (617) 495-5922 HOx SPADE 1 1 1992 11 09 1993 10 7 0 Elapsed time (sec) from 0 GMT on flight day 2 1 1 999999 999999 OH Volume Mixing Ratio (x 1e15) HO2 Volume Mixing Ratio (x 1e15) 0 11 ***** First Final Data - Software version 2.0 ***** OH and HO2 measurements are taken within 10 sec of timestamp Absolute Uncertainties (2-sigma) are approximately +/- 40 percent +/- .01 ppt for OH; +/- 47 percent +/- .01 ppt for HO2 Uncertainty is expected to decrease with further lab calibration work Absolute Uncertainty for the ratio: OH/HO2 is approximately 30 percent Reported HO2 will contain a fractional contribution from RO2. R=CH3,C2H5 HO2 reported = [HO2] + (.4 - .6)[RO2] for pressures less than 150 torr ***** First Final Data ***** Time OH HO2 0 999999 999999