IBEX High Energy Neutral Atom Imager (Hi) Data Release 16, Compton-Getting corrected, Survival Probability corrected, Omnidirectional, West Longitude Ecliptic Maps, Level H3 (H3), semiannually averaged Data

Metadata Updated: April 10, 2026

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.\n 2: This data set is from the Release 16 (6 months-cadence) IBEX-Hi map data for the years 2009-2019 in the form of omnidirectional 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.\n 3. The data consist of all-sky maps in Solar Ecliptic Longitude (east and west) and Latitude angles for ENA (hydrogen) fluxes from IBEX-Hi energy bands 2-6 in numerical data form. Energy channels 2-6 have FWHM ranges of 0.52-0.95, 0.84-1.55, 1.36-2.50, 1.99-3.75, 3.13-6.00 keV, respectively. The corresponding center-point energies are 0.71, 1.11, 1.74, 2.73, and 4.29 keV. Details of the data and enabled science from Release 10 are given in the following journal publication:\n 4: McComas, D. J., et al. (2017), Seven Years of Imaging the Global Heliosphere with IBEX, Astrophys. J. Supp. Ser., 229(2), 41 (32 pp.),\n 5: http://doi.org/10.3847/1538-4365/aa66d8\n 6. The following codes are used to define dataset types:\n- 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.\n- nocg = no Compton-Getting corrections\n- 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.\n- noSP - no survival probability corrections have been applied to the data.\n- omni = data from all directions.\n- ram = data was collected when the spacecraft was ramming into the incoming ENAs.\n- antiram = data was collected when the spacecraft was moving away from the incoming ENAs.\n 7. The following list associates Release 16 map numbers (1-22) with mission year (1-9), orbits (11-471b), and dates (12/25/2008-12/26/2019):\n- Map 1: Map2009A, year 1, orbits 11-34, dates 12/25/2008-06/25/2009\n- Map 2: Map2009B, year 1, orbits 35-58, dates 06/25/2009-12/25/2009\n- Map 3: Map2010A, year 2, orbits 59-82, dates 12/25/2009-06/26/2010\n- Map 4: Map2010B, year 2, orbits 83-106, dates 06/26/2010-12/26/2010\n- Map 5: Map2011A, year 3, orbits 107-130a, dates 12/26/2010-06/25/2011\n- Map 6: Map2011B, year 3, orbits 130b-150a, dates 06/25/2011-12/24/2011\n- Map 7: Map2012A, year 4, orbits 150b-170a, dates 12/24/2011-06/22/2012\n- Map 8: Map2012B, year 4, orbits 170b-190b, dates 06/22/2012-12/26/2012\n- Map 9: Map2013A, year 5, orbits 191a-210b, dates 12/26/2012-06/26/2013\n- Map 10: Map2013B, year 5, orbits 211a-230b, dates 06/26/2013-12/26/2013\n- Map 11: Map2014A, year 6, orbits 231a-250b, dates 12/26/2013-06/26/2014\n- Map 12: Map2014B, year 6, orbits 251a-270b, dates 06/26/2014-12/24/2014\n- Map 13: Map2015A, year 7, orbits 271a-290b, dates 12/24/2014-06/24/2015\n- Map 14: Map2015B, year 7, orbits 291a-310b, dates 06/24/2015-12/23/2015\n- Map 15: Map2016A, year 8, orbits 311a-330b, dates 12/24/2015-06/23/2016\n- Map 16: Map2016B, year 8, orbits 331a-351a, dates 06/24/2016-12/26/2016\n- Map 17: Map2017A, year 9, orbits 351b-371a, dates 12/26/2016-06/24/2017\n- Map 18: Map2017B, year 9, orbits 371b-391a, dates 06/25/2017-12/25/2017\n- Map 19: Map2018A, year 10, orbits 391b-411b, dates 12/25/2017-06/28/2018\n- Map 20: Map2018B, year 10, orbits 412a-431b, dates 06/29/2018-12/26/2018\n- Map 21: Map2019A, year 11, orbits 432a-451b, dates 12/27/2018-06/27/2019\n- Map 22: Map2019B, year 11, orbits 452a-471b, dates 06/28/2019-12/26/2019\n* 8: This particular data set, denoted in the original ascii files as hvset_cg_tabular_NX for N=2009-2019, which indicates a year data collected, and X = A or B, showing first or second half of the year, includes pixel map data from all directions (omnidirectional), CG, SP, 6 month cadence.

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Metadata Created Date	April 11, 2025
Metadata Updated Date	April 10, 2026

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Resource Type	Dataset
Metadata Created Date	April 11, 2025
Metadata Updated Date	April 10, 2026
Publisher	NASA Space Physics Data Facility (SPDF) Coordinated Data Analysis Web (CDAWeb) Data Services
Maintainer	NASA Space Physics Data Facility
Identifier	https://doi.org/10.48322/f50h-6551
Data Last Modified	2026-04-06
Category	Heliophysics
Public Access Level	public
Bureau Code	026:00
Metadata Context	https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Schema Version	https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby	https://project-open-data.cio.gov/v1.1/schema/catalog.json
Harvest Object Id	1bd8bbca-71bd-4c18-9abf-265b8b3fe9a2
Harvest Source Id	58f92550-7a01-4f00-b1b2-8dc953bd598f
Harvest Source Title	NASA Data.json
Homepage URL	https://doi.org/10.48322/f50h-6551
License	https://www.usa.gov/government-works
Program Code	026:000
Source Datajson Identifier	True
Source Hash	fc49a0d2479476765661f468f05b082a0d430315db383da0777688586d45ea4e
Source Schema Version	1.1

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