Ulysses COSPIN-LET: Daily Proton and Helium Fluxes from Cosmic Ray Telescope

Daily average fluxes for protons in five energy ranges (2-4, 4-6, 6-8, 8-16, 16-20 MeV) and alpha particles in three ranges (4-6, 6-9, 11-20 MeV/n), including Poisson uncertainties. The data originates from the Ulysses spacecraft's COSPIN Low Energy Telescope instrument and is provided by NASA. The dataset was last updated on March 13, 2026.

Use Cases

• Analyze solar particle event intensity based on proton flux measurements
• Study cosmic ray modulation based on daily helium particle fluxes
• Model radiation hazards in space based on multi-energy particle data
• Validate particle transport simulations based on observed flux uncertainties

Strengths

• Data includes Poisson uncertainties for each flux measurement
• Fluxes are provided for protons in five distinct energy ranges
• Fluxes are provided for helium particles in three energy ranges per nucleon

Limitations

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

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Data collected by the Ulysses spacecraft's COSPIN Low Energy Telescope instrument.

Freshness

Last updated 2026-03-13 09:30:56.093121; freshness should be verified