COSPIN-HET: Daily Proton and Helium Fluxes from Ulysses, 1990-2009

Daily average fluxes of protons and helium nuclei from the Ulysses spacecraft's COSPIN High Energy Telescope. The data covers two energy ranges, 39-70 MeV/n and 71-94 MeV/n, spanning from day 296 of 1990 through day 181 of 2009. This dataset was produced by the National Aeronautics and Space Administration.

Use Cases

• Modeling solar particle event time profiles based on daily flux averages.
• Analyzing long-term modulation of galactic cosmic rays based on the 19-year time series.
• Correlating particle flux variations with solar cycle activity based on the energy-resolved proton and helium data.
• Validating heliospheric transport models based on multi-nuclei (proton and helium) flux measurements.

Strengths

• Covers a 19-year time series from 1990 to 2009, providing long-term solar cycle coverage.
• Provides data for two distinct particle species (protons and helium) in two energy ranges.
• Includes error estimates for the flux measurements.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data is stored in a BIN format, which may require specialized tools for access.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Measurements from the COSPIN High Energy Telescope (HET) aboard the Ulysses spacecraft.

Time Range

Day 296, 1990 through Day 181, 2009

Freshness

Last updated 2026-03-13 05:46:36.739726; freshness should be verified.

Geography

Heliospheric (Ulysses spacecraft orbit)