Start_Time      Stop_Time       Feature_Type            Note(s)
54151           54531           Tropopause Crossing     Broad tropopause crossing during initial ascent
55271           55331           Unknown Filament        O3 laminae ~4 km above tropopause, likely a high-latitude filament
65251           65271           Strong Gradient         A drop of ~600 ppbv in O3 high in the stratosphere during descent (>5 km above the LRT and ~440-K)
65781           65921           Tropopause Crossing     Sharp tropopause crossing during descent
66721           66831           Tropopause Crossing     Sharp tropopause crossing during ascent
69301           69371           Unknown Filament        Apparent tropospheric filament (increase in CO and decrease in O3 and H2O) at ~3.5 km above tropopause (~400-K) during descent
70781           70911           Unknown Filament        Apparent tropospheric filament (increase in CO and decrease in O3 and H2O) at ~3.5 km above tropopause (~400-K) during ascent, similar to before
72781           72871           Unknown Filament        Apparent tropospheric filament (increase in CO and decrease in O3 and H2O) at ~3.5 km above tropopause (~400-K) during descent, similar to before
74191           74301           Unknown Filament        Apparent tropospheric filament (increase in CO and decrease in O3 and H2O) at ~3.5 km above tropopause (~400-K) during ascent, similar to before
77461           77821           Recent Convection       Broad marginal stratospheric H2O enhancement during mostly level leg ~1.5 km above tropopause (~380-K), linked with <6-hour-old convection
78251           78331           Tropopause Crossing     Sharp tropopause crossing during descent           
