https://spdf.gsfc.nasa.gov/pub/data/ibex/hi/maps/images/release_2/ibex_hi_maps_images_release2_readme.txt

This directory has five subdirectories of Release 2
IBEX-Hi map data in image (PNG) format.

map1 subdirectory has Epoch 1, spacecraft-frame maps.
map2 subdirectory has Epoch 2, spacecraft-frame maps.
map1_CG subdirectory has Epoch 1, heliosphere-frame maps.
map2_CG subdirectory has Epoch 2, heliosphere-frame maps. 
map_combined1_2 subdirectory has heliosphere-frame maps
accumulated over Epochs 1 and 2 combined.

Epochs 1 and 2 span 12/2008-06/2009 and 6/2009-12/2009
respectively.

Heliosphere-frame data are basically Compton-Getting-corrected spacecraft-frame data.

Further details on the data of each subdirectory are contained in the aareadme files of the respective subdirectories.

An overview of Release 2 data is at
http://ibex.swri.edu/ibexpublicdata/Data_Release_2/