IBEX Low Energy Neutral Atom Imager (Lo) Data Release 04, Compton-Getting corrected, Survival Probability corrected, Ram direction, West Longitude Ecliptic Maps, Level H3 (H3), three year average Data

1: The Interstellar Boundary Explorer (IBEX) has operated in space since 2008 updating our knowledge of the outer heliosphere and its interaction with the local interstellar medium. Start-time: 2008-12-25. There are currently 16 releases of IBEX-HI and/or IBEX-LO data covering 2009-2019.
2: This data set is from the Release 4 (3-year-average of 6-month-cadence maps) IBEX-Lo map data for the first three years 2009-2012 in the form of ram-directional ENA (hydrogen) fluxes with Compton-Getting correction (cg) of flux spectra for spacecraft motion and correction for ENA survival probability (sp) between 1 and 100 AU.
3: The data consist of all-sky maps in Solar Ecliptic Longitude (east and west) and Latitude angles for ENA (hydrogen) fluxes from IBEX-Lo energy bands 1-8 in numerical data form. Energy channels 1-8 have FWHM center-point energies at 0.015, 0.029, 0.055, 0.11, 0.209, 0.439, 0.872, 1.821 keV, respectively. Details of the data and enabled science from Release 10 are given in the following journal publication:
4: S.A. Fuselier et al., The IBEX-Lo Sensor. Space Sci Rev (2009) 146: 117...147; DOI 10.1007/s11214-009-9495-8
5: https://link.springer.com/article/10.1007/s11214-009-9495-8
1. The following codes are used to define dataset types:
cg = Compton-Getting corrections have been applied to the data to account for the speed of the spacecraft relative to the direction of arrival of the ENAs.
nocg = no Compton-Getting corrections
sp = survival probability corrections have been applied to the data to account for the loss of ENAs due to radiation pressure, photoionization and ionization via charge exchange with solar wind protons as they stream through the heliosphere. This correction scales the data out from IBEX at 1 AU to ~100 AU. In the original data this mode is denoted as Tabular.
noSP - no survival probability corrections have been applied to the data.
omni = data from all directions.
ram = data was collected when the spacecraft was ramming into the incoming ENAs.
antiram = data was collected when the spacecraft was moving away from the incoming ENAs.
1. The following list associates Release 10 map numbers (1-14) with mission year (1-7), orbits (11-310b), and dates (12/25/2008-12/23/2015):
Map 1: Map2009A, year 1, orbits 11-34, dates 12/25/2008-06/25/2009
Map 2: Map2009B, year 1, orbits 35-58, dates 06/25/2009-12/25/2009
Map 3: Map2010A, year 2, orbits 59-82, dates 12/25/2009-06/26/2010
Map 4: Map2010B, year 2, orbits 83-106, dates 06/26/2010-12/26/2010
Map 5: Map2011A, year 3, orbits 107-130a, dates 12/26/2010-06/25/2011
Map 6: Map2011B, year 3, orbits 130b-150a, dates 06/25/2011-12/24/2011
Map 7: Map2012A, year 4, orbits 150b-170a, dates 12/24/2011-06/22/2012
Map 8: Map2012B, year 4, orbits 170b-190b, dates 06/22/2012-12/26/2012
Map 9: Map2013A, year 5, orbits 191a-210b, dates 12/26/2012-06/26/2013
Map 10: Map2013B, year 5, orbits 211a-230b, dates 06/26/2013-12/26/2013
Map 11: Map2014A, year 6, orbits 231a-250b, dates 12/26/2013-06/26/2014
Map 12: Map2014B, year 6, orbits 251a-270b, dates 06/26/2014-12/24/2014
Map 13: Map2015A, year 7, orbits 271a-290b, dates 12/24/2014-06/24/2015
Map 14: Map2015B, year 7, orbits 291a-310b, dates 06/24/2015-12/23/2015
8: The energy resolution is delta-E/E = 0.8 for all channels: Energy channel 1: center energy = 0.015 keV Energy channel 2: center energy = 0.029 keV Energy channel 3: center energy = 0.055 keV Energy channel 4: center energy = 0.11 keV Energy channel 5: center energy = 0.209 keV Energy channel 6: center energy = 0.439 keV Energy channel 7: center energy = 0.872 keV Energy channel 8: center energy = 1.821 keV
9: This particular data set, denoted in the original ascii files in the map_ram folder, includes pixel map data from ram direction (ram-directional), CG, SP, 3 year cadence.

Data and Resources

Additional Info

Field	Value
Maintainer	NASA Space Physics Data Facility
Last Updated	November 5, 2026, 13:14 (UTC)
Created	April 8, 2025, 14:23 (UTC)
Identifier	https://doi.org/10.48322/515f-h683
Modified	2026-11-02T22:16:01Z
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