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    • ISEE 3 Isotopic Fractions

    Metadata Updated: April 10, 2026

    This data product consists of a single ASCII file \ncontaining values and their uncertainties for isotopic fractions of 56 \nspecific isotopes relative to isotope-integrated elemental abundances, \nfor 15 elements (Be, B, N, S, Cl, Ar, K, Ca, Ti, V, Cr, Mn, Fe, Co, Ni). \nBetween this data product and a companion product with isotopic abundance \nratios, isotopic composition information is given for 21 chemical elements. \nThe fractions are based on 1978-1981 observations of ~50-500 MeV/n cosmic \nrays by the U. Chicago cosmic ray experiment on ISEE 3. Each of the ratios \nis linked in the ASCII file to the publication where its derivation is \ndiscussed.

    Access & Use Information

    Public: This dataset is intended for public access and use. License: See this page for license information.

    Downloads & Resources

    Dates

    Metadata Created Date March 13, 2026
    Metadata Updated Date April 10, 2026

    Metadata Source

    Harvested from NASA Data.json

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date March 13, 2026
    Metadata Updated Date April 10, 2026
    Publisher NASA Space Physics Data Facility (SPDF) Data Services
    Maintainer
    Identifier /SDE/SPASE_JSON/|f634e439266327eae4afa084ec001898
    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 491b71c0-279f-43a3-9ad2-8221c720f3d8
    Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
    Harvest Source Title NASA Data.json
    License https://www.usa.gov/government-works
    Program Code 026:000
    Source Datajson Identifier True
    Source Hash d9f93ea12fa911415bc5b3dacaf574be99fa9f3e8f002008ff6aaca2342f58a1
    Source Schema Version 1.1

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