Data from Research Flight 8, approx 8.5 hours. (bottom panel) Altitude plot. Sampling was done at constant altitude legs of 10 to 60 minute duration. (top panel) Total particle concentrations of CN (blue) and several PMS probes. Greater concentrations were detected by instruments sensitive to smaller particles, as expected. Note increased concentrations at lower altitudes. Green arrow identifies ~1 hour segment at low altitudes, for which data are shown in the next slide.

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