ISEE 3 Elemental Abundance Ratios

This ASCII file contains values and their uncertainties for 25 abundance ratios of various pairs of 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.

Data and Resources

Additional Info

Field	Value
Maintainer	NASA Space Physics Data Facility
Last Updated	September 7, 2026, 23:25 (UTC)
Created	August 10, 2026, 19:00 (UTC)
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