ACE EPAM: Hourly-Averaged Energetic Particle Fluxes from Spacecraft

NASA's ACE spacecraft provides an ensemble of 26 data sets of hourly-averaged, background-corrected energetic particle fluxes. The data includes fluxes for protons, electrons, and ions with Z>1 across multiple energy bins, measured in different telescope apertures and reference frames. The data was last updated on 2026-03 -13.

Use Cases

• Modeling solar wind particle acceleration based on multi-energy-bin flux data.
• Analyzing directional particle anisotropy based on spin-sectored measurements from four telescope apertures.
• Studying space weather events by correlating proton and electron fluxes in different reference frames.
• Investigating ion composition in the heliosphere based on data for Z>1 ions.

Strengths

• Data is background-corrected, which likely improves signal clarity.
• Provides multi-instrument perspective with fluxes from four distinct telescope apertures (LEMS30, LEFS60, LEMS120, LEFS150).
• Covers multiple particle species (protons, electrons, ions) across defined energy ranges partitioned into 10-25 bins.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data is provided in BIN and HTML formats, which may require specialized tools for analysis.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Hourly-averaged measurements from the ACE spacecraft's EPAM instrument suite.

Time Range

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Freshness

Last updated 2026-03-13 14:34:42.265664; freshness should be verified.

Geography

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