STEREO-A IMPACT SIT: 1-Minute Multi-Z Ion Spectra from a Solar Observatory

IMPACT Suprathermal Ion Telescope data provides 1-minute resolution ion fluxes for nine species, including hydrogen, helium, carbon, oxygen, and iron, across energy bands typically spanning ~0.04 to 9 MeV/nucleon. This dataset from NASA's STEREO-A mission, last updated in March 2026, includes associated uncertainties due to counting statistics for each measurement.

Use Cases

• Modeling solar energetic particle acceleration and transport based on multi-species ion flux data.
• Analyzing the composition of suprathermal ions in solar wind based on the listed species (H, He, C, O, Fe, etc.).
• Studying the temporal evolution of coronal mass ejections (CMEs) based on 1-minute resolution time-series data.
• Calibrating or validating space weather prediction models based on in-situ particle measurements.

Strengths

• Provides measurements for nine distinct ion species, including ultra-heavy ions.
• Data is recorded at a high 1-minute temporal resolution.
• Includes associated uncertainty values for each flux measurement due to counting statistics.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment for large-scale analysis.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

In-situ measurements from the Suprathermal Ion Telescope (SIT) on the STEREO-A spacecraft.

Time Range

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Freshness

Last updated 2026-03-13 04:47:54.415735; freshness should be verified.

Geography

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