START08/pre-HIPPO RF15 pre-HIPPO overnight leg 1 with low approach over LEF (17:10) and Hudson Bay lowlands sampling Fridge trap bypassed, 24" U traps, 1/2" main trap GV power fail during preflight - delayed take-off 16:35 CO2 + 2 ppm while level at 41 kft LiH2O pegged at -1.0 because of calibration drift 20:10-20:25 O3 filaments 22:04 leaving stratosphere, O3/CO2/O2 correlations Inlet as 1/8" stainless steel with first pressure control at inlet bulkhead 4-way in AFT position