ACE Spacecraft Solar Wind and Cosmic Ray Particle Flux Measurements

NASA's Advanced Composition Explorer spacecraft provides browse data on particle fluxes and magnetic fields from a point 1.5 million km upstream of Earth along the Sun-Earth line. The dataset includes unsectored fluxes of ions at many energies, electrons at a few energies, the interplanetary magnetic field, and solar wind parameters like proton speed and temperature. It is managed by NASA's Office of Space Science Mission and Payload Development Division and processed by the Science Center for rapid public release.

Use Cases

• Monitoring large-scale solar wind behavior using parameters like proton speed and temperature.
• Identifying solar energetic particle events or interplanetary shock passages through time-series analysis of unsectored ion fluxes.
• Investigating relationships between different particle populations by comparing fluxes of ions at various energies and electrons.
• Correlating interplanetary magnetic field measurements with particle flux data to study acceleration mechanisms.

Strengths

• Data is generated automatically from the spacecraft stream for rapid delivery to the public domain.
• Covers a broad energy range from solar wind energies up to 500 MeV/nucleon for galactic cosmic rays.
• Provides a multi-instrument view including particle fluxes, magnetic field, and solar wind parameters.

Limitations

• Data are not routinely checked for accuracy and are subject to revision, as noted in the source documentation.
• The browse parameters are an abbreviated subset of measurements, not the full level one data.
• Specific row count, column count, and temporal coverage are not provided in the input.

Provenance

Source

NASA Advanced Composition Explorer (ACE) spacecraft instruments.

Collection Method

Automatically generated from the spacecraft data stream using simple algorithms provided by instrument investigators.

Geography

L1 Lagrange point approximately 1.5 million km upstream of Earth along the Sun-Earth line.