2.2.9 spase://NASA/NumericalData/ISEE3/IsotAbun ISEE 3 Isotopic Abundance Ratios 2021-03-11T18:39:11Z This data product consists of a single ASCII file containing values and their uncertainties for 32 abundance ratios of various pairs of isotopes of 13 chemical elements (C, O, Ne, Mg, Al, Si, Ti, V, Cr, Mn, Fe, Co, Ni). Between this data product and a companion catalog with isotopic fractions, isotopic composition information is given for 21 chemical elements. The ratios are based on 1978-1981 observations of ~50-500 MeV/n cosmic rays by the U. Chicago cosmic ray experiment on ISEE 3. Each of the ratios is linked in the ASCII file to the publication where its derivation is discussed. Please acknowledge the author(s) of the relevant publication(s) as mentioned above, and acknowledge Mark Wiedenbeck, the ISEE 3 instrument Principal Investigator. spase://SMWG/Person/Mark.E.Wiedenbeck PrincipalInvestigator subdirectory holding ISEE 3 cosmic ray data https://spdf.gsfc.nasa.gov/pub/data/isee/isee3/energetic_particles_cr/cr_composition/ spase://VEPO/NumericalData/ISEE3/IsotAbun spase://VSPO/NumericalData/ISEE3/IsotAbun spase://SMWG/Repository/NASA/GSFC/SPDF Online Open FTPS from SPDF (not with most browsers) ftps://spdf.gsfc.nasa.gov/pub/data/isee/isee3/energetic_particles_cr/cr_composition/table3.txt HTTPS from SPDF https://spdf.gsfc.nasa.gov/pub/data/isee/isee3/energetic_particles_cr/cr_composition/table3.txt In CDF via HTTP from SPDF Text 3 KB Please acknowledge the author(s) of the relevant publication(s) as mentioned above, and acknowledge Mark Wiedenbeck, the ISEE 3 instrument Principal Investigator. spase://SMWG/Instrument/ISEE3/HECR EnergeticParticles IonComposition 1978-08-18T00:00:00 1981-04-30T00:00:00 This is span of data used in deriving 32-month averaged ratios P32M