https://spdf.gsfc.nasa.gov/pub/data/ibex/release3/lo/time_series/direct_events/aareadme.txt This directory provides eight energy band-specific subdirectories containing 8-day (full IBEX orbit) "direct event" files produced by the IBEX-Lo instrument. A direct event is the arrival of a single energetic neutral atom. For each such event, an arrival time, a look direction (R.A and Dec, in J2000 ecliptic coordinates), event type flags, and the IBEX location are given. The difference between successive time tags range from fractions of a second to hundreds of seconds. Each data file has header material describing the words in the data records. The TS_description.txt file in the parent directory should be studied to more fully understand the data. File naming is addressed in the readme two directory levels up.