UARS PEM HEPSA: Daily Electron Spectra from Earth's Upper Atmosphere

Electron intensity spectra from 35 keV to 5 MeV were collected every 4.086 seconds by four directional telescopes on the UARS spacecraft. The dataset provides daily files from October 1, 1991 to August 23, 2005, covering latitudes between -57 and +57 degrees. Data from two logical detectors (DE: 35-300 keV, EE: 300 keV-5 MeV) characterize charged particles injected into the stratosphere, mesosphere, and thermosphere.

Use Cases

• Analyzing solar energetic particle event impacts on the upper atmosphere based on high-resolution electron spectra.
• Studying the directional flux of electrons using measurements from four telescopes oriented at -15°, +15°, +45°, and +90°.
• Modeling radiation environment and particle precipitation in the latitude band from -57° to +57°.
• Investigating long-term trends in electron flux from 1991 to 2005 for climate and space weather research.

Strengths

• Provides a long-term, 14-year temporal record from 1991 to 2005.
• Offers high temporal resolution with spectral accumulations every 4.086 seconds.
• Includes directional particle data from four telescopes and two energy-detector systems (DE and EE).

Limitations

• Spatial coverage is limited to latitudes between -57 and +57 degrees, excluding polar regions.
• Data format is network binary, requiring specific tools or guides for interpretation.
• Metadata on row count, file size, and specific column structure is unavailable across all sources.

Provenance

Source

National Aeronautics and Space Administration (NASA)

Collection Method

Collected by the Particle Environment Monitor (PEM) High-Energy Particle Spectrometer (HEPS) on the Upper Atmosphere Research Satellite (UARS) spacecraft.

Time Range

1991-10-01 to 2005-08-23

Freshness

2026-04-09 21:25:34.515595

Geography

Global coverage between -57 and +57 degrees latitude.