IBEX Low Energy Neutral Atom Imager (Lo) Data Release 17, Compton-Getting corrected, Survival Probability corrected, Antiram direction, West Longitude Ecliptic Maps, Level H3 (H3), annually averaged 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 17 (1 year-cadence) IBEX-Lo map data for the years 2009-2019 in the form of antiram-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.
    1. 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.
  • 4: Details of the data and enabled science from Release 10 are given in the following journal publication: McComas, D. J., et al. (2017), Seven Years of Imaging the Global Heliosphere with IBEX, Astrophys. J. Supp. Ser., 229(2), 41 (32 pp.),
  • 5: http://doi.org/10.3847/1538-4365/aa66d8
    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 17 map numbers (1-22) with mission year (1-9), orbits (11-471b), and dates (12/25/2008-12/26/2019):
  • 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
  • Map 15: Map2016A, year 8, orbits 311a-330b, dates 12/24/2015-06/23/2016
  • Map 16: Map2016B, year 8, orbits 331a-351a, dates 06/24/2016-12/26/2016
  • Map 17: Map2017A, year 9, orbits 351b-371a, dates 12/26/2016-06/24/2017
  • Map 18: Map2017B, year 9, orbits 371b-391a, dates 06/25/2017-12/25/2017
  • Map 19: Map2018A, year 10, orbits 391b-411b, dates 12/25/2017-06/28/2018
  • Map 20: Map2018B, year 10, orbits 412a-431b, dates 06/29/2018-12/26/2018
  • Map 21: Map2019A, year 11, orbits 432a-451b, dates 12/27/2018-06/27/2019
  • Map 22: Map2019B, year 11, orbits 452a-471b, dates 06/28/2019-12/26/2019
  • 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 as lvset_h_tabular_antiram_cg_hb_N for N=2009-2019, includes pixel map data from antiram direction, CG, SP, 1 year cadence.

Data and Resources

Additional Info

Field Value
Maintainer NASA Space Physics Data Facility
Last Updated September 7, 2026, 23:20 (UTC)
Created April 8, 2025, 14:23 (UTC)
accessLevel public
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