START08/pre-HIPPO RF16 pre-HIPPO overnight leg 2 Fridge trap bypassed, 24" U traps, 1/2" main trap GV power fail during preflight again 16:52 @ 20 kft O3, NOy, O2 up, CO2 down = forest fire plume plus photosynthesis 18:00-18:30 up to 5 ppm CO2 var in BL 20:05 pollutions plume O2, CO2, NOy 22:07 pollutions plume O2, CO2, NOy, CONCN, no O3 or CO (?) 22:15 @ 21kft O3, NO up = fire plume Inlet as 1/8" stainless steel with first pressure control at inlet bulkhead 4-way in AFT position