18:13 As per Britt's instructions, left sample to LP until a couple of minutes into flight (earliest possible) to check on whether initial C spike affects later C values. 18:45 Prepurge looks good. Pos 7 starts low because during Leakcheck1 one sticky valve was open (shipped that way). Must purge Pos 7 extra to rid of any moisture. 18:55:20-56:35 DSM cycled to get UHSAS back online. Turns out UHSAS relies on attack angle to report, and that attack angle and PALTF, PSXC were all down at the time. Same problem as before, it seems--sounds like analog card that reads them didn't get replaced in Anchorage as planned. 20:38-45 Interesting lowCO2, highO2 feature may have coincided with jetstream and shows what could be a strong plume from asia with strong CO2 drawdown land signal and slightly elevated CO, CH4 signals showing terrestrial/industrial origin. Eric thinks the stregth of the drawdown effect has overwhelmed the concomitant CO2 enrichment from industrial sources to mask the CO2 increase you'd usually see with polluted air. Seems plausible. 22:23 Very prominent boundary, E-W running, in clouds at about 39.5 N see pictures from about 4:23 PM on 8/22/2011. ~00:40 Huge green algae blooms in the ocean on both sides. Definitely some drawdown signal, but not huge like at higher lats Seems to suggest that drawdown signals without clouds above them Don't get preserved as well as those with clouds. Drawdown was either recent enough to not be huge, or the signal is just being propegated up by the hot tropical sun ~01:10 Noted that PC1 was able to control 170 torr still at 41Kft. Probably because cal has wandered down (reads lower than other P readings) and because it is over tropics. 19:00:00-19:01:00 AO2 Inlet Breath Test #1 00:00:00-00:00:00 AO2 Inlet Breath Test #2