Ulysses COSPIN-HET: High-Energy Electron Counts by Spin Sector, 64-Second Resolution

Full-resolution electron counts and accumulation times from the Ulysses spacecraft's High Energy Telescope, recorded every 64 seconds. The data, organized by eight 45-degree spin sectors, primarily capture electrons in the approximate 5-10 MeV energy range. It was produced by NASA's COSPIN investigation, with daily files available from at least 1990 to 2002.

Use Cases

• Modeling solar particle anisotropy based on eight-sector coincidence counting rates.
• Analyzing temporal variations in high-energy electron fluxes based on 64-second readout intervals.
• Studying spacecraft spin-synchronized data cycles based on the described accumulation period variations.
• Calibrating or validating heliospheric particle transport simulations based on the sector-resolved electron counts.

Strengths

• Provides sector-resolved particle counts, enabling directional analysis of particle fluxes.
• Data includes precise timing with fractional year and millisecond-level start times for accumulation periods.
• Covers a multi-year time range, evidenced by file naming conventions for years like 1990 and 2002.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Description metadata is limited; actual data quality requires manual inspection after download.

Provenance

Source

National Aeronautics and Space Administration (NASA)

Collection Method

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

Time Range

At least 1990 to 2002, based on file naming convention examples.

Freshness

Last updated 2026-03-13 05:39:59.748193; freshness should be verified.

Geography

Heliospheric, from the orbit of the Ulysses spacecraft.