START08/pre-HIPPO RF01 Tropopause sampling over Hudson Bay 16:00 O3 and O2 peak 19:00:00 switched inlet 4-way to FWD 19:01:30 switched inlet 4-way to AFT 19:20:01 switched inlet 4-way to FWD 19:23:00 switched inlet 4-way to AFT 19:26:00 switched inlet 4-way to FWD 19:29:38 switched inlet 4-way to AFT 19:32:00 switched inlet 4-way to FWD 19:34:20 switched inlet 4-way to AFT (while on LS) 20:18 CO2 jump and O2 drop crossing into troposphere 21:08 program hung 21:38 restarted (with flag of a again) 21:45 relit lamp 21:54 light chop 21:55:20 moderate chop Fridge trap inline, 16" u-traps, 3/4" main trap Inlet as 1/4" Synflex with first pressure control in rack - pressure/surface effect on O2