PSP IS☉IS EPI-Lo: Solar Energetic Particle Ion Composition, 1-Minute Data

Parker Solar Probe IS☉IS EPI-Lo instrument data provides 1-minute resolution measurements of energetic particle ion composition near the Sun. The data is calibrated by the IS☉IS science team and updated over the mission's course based on improved instrument understanding. The dataset is produced by NASA and the University of New Hampshire, with last metadata update on 2026-03 13.

Use Cases

• Analyzing temporal evolution of energetic particle fluxes based on 1-minute integration periods.
• Studying ion composition and species ratios in the near-Sun environment.
• Investigating pitch angle distributions based on magnetic field data from the PSP FIELDS team.
• Modeling solar particle event characteristics and acceleration mechanisms.

Strengths

• Data reflects current instrument calibration as determined by the IS☉IS science team.
• Calibration is ongoing, with public data updates planned over the mission.
• Pitch angle calculations are enabled via integration with PSP FIELDS magnetic field data.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count and data volume are unknown, which may limit suitability assessment.
• Data accuracy is not guaranteed to be error-free, as noted by the team.

Provenance

Source

NASA Parker Solar Probe mission, IS☉IS Science Team (PI: D. J. McComas, Princeton University).

Collection Method

Collected by the Energetic Particle Instrument-Lo (EPI-Lo) on the Parker Solar Probe spacecraft.

Time Range

Temporal coverage spans the ongoing Parker Solar Probe mission.

Freshness

Last updated 2026-03-13 07:57:22.598862; freshness should be verified.

Geography

Spatial coverage is the near-Sun environment along the Parker Solar Probe's trajectory.