https://spdf.gsfc.nasa.gov/pub/data/ibex/release3/lo/maps/digital_data/release_1/aareadme.txt

This directory provides digital versions of the first three 6-month, all-sky maps of ENA (hydrogen) fluxes from IBEX-Lo energy bands 5-7. File naming and energy band limits are addressed in aareadme files of parent directories. These are "Release 1" data.

The digital file consist of 30 rows of data, each with 720 columns. Row 1 correspondsto the North Ecliptic Pole, while row 30 corresponds to the South Ecliptic Pole. The columns start at ecliptic longitude 0 and step through to ecliptic longitude 360: the values of the first and last columns in each map are identical.
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