• Organization: National Oceanic and Atmospheric Administration, Department of Commerce
• Updated: 2013-05-01T00:00:00.000+00:00

The Space Environment Monitor (SEM) instruments onboard GOES 13-15 have four Energetic Particle Sensors, which include SEM/HEPAD (High Energy Proton and Alpha Particles Detector), SEM/EPEAD...

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• Organization: National Oceanic and Atmospheric Administration, Department of Commerce
• Updated: 1994-05-01T00:00:00.000+00:00

The Space Environment Monitor (SEM) is a suite of instruments onboard the GOES satellite series. The objective of the SEM package is to measure solar radiation in the X-ray and Extreme Ultraviolet...

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• Organization: National Aeronautics and Space Administration
• Updated: 2025-07-17

This near encounter data set consists of electron and ion counting rate data from the Low Energy Charged Particle (LECP) experiment on Voyager 1 while the spacecraft was within the very close...

• Organization: National Aeronautics and Space Administration
• Updated: 2025-07-17

This near encounter data set consists of electron and ion counting rate data from the Low Energy Charged Particle (LECP) experiment on Voyager 1 while the spacecraft was within the very close...

• Organization: National Aeronautics and Space Administration
• Updated: 2025-07-17

This near encounter data set consists of electron and ion counting rate data from the Low Energy Charged Particle (LECP) experiment on Voyager 1 while the spacecraft was within the very close...

• Organization: National Aeronautics and Space Administration
• Updated: 2025-07-17

This near encounter data set consists of electron and ion counting rate data from the Low Energy Charged Particle (LECP) experiment on Voyager 1 while the spacecraft was within the very close...

• Organization: National Aeronautics and Space Administration
• Updated: 2025-07-17

This near encounter step data set consists of the counting rate and flux data for electrons and ions from the Low Energy Charged Particle (LECP) experiment on Voyager 1 while the spacecraft was...

• Organization: National Oceanic and Atmospheric Administration, Department of Commerce
• Updated: 1974-07-01T00:00:00.000+00:00

*Note: This dataset version has been superseded by a newer version. It is highly recommended that users access the current version. The Space Environment Monitor (SEM) is a suite of instruments...

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• Organization: National Oceanic and Atmospheric Administration, Department of Commerce
• Updated: 1974-07-01T00:00:00.000+00:00

*Note: This data has been reprocessed by NCEI adding quality flags and using consistent file formats across the period of record (POR). It is highly recommended that users access this version of...

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• Organization: National Aeronautics and Space Administration
• Updated: 2025-07-17

This near encounter step data set consists of the counting rate and flux data for electrons and ions from the Low Energy Charged Particle (LECP) experiment on Voyager 1 while the spacecraft was...

• Organization: National Aeronautics and Space Administration
• Updated: 2025-07-17

This far encounter data set consists of electron and ion counting rate data from the Low Energy Charged Particle (LECP) experiment on Voyager 1 while the spacecraft was within the vicinity of...

• Organization: National Aeronautics and Space Administration
• Updated: 2026-02-16

This CDAWeb-accessible data set contains 30-minute, spin-averaged count rates and fluxes, and their statistical uncertainties, of energetic particles from the IMP8 GME experiment. Included are...

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• Organization: National Aeronautics and Space Administration
• Updated: 2025-07-17

This far encounter data set consists of electron and ion counting rate data from the Low Energy Charged Particle (LECP) experiment on Voyager 2 while the spacecraft was within the vicinity of...

• Organization: National Aeronautics and Space Administration
• Updated: 2025-07-17

This far encounter data set consists of electron and ion counting rate data from the Low Energy Charged Particle (LECP) experiment on Voyager 2 while the spacecraft was within the vicinity of...

• Organization: National Aeronautics and Space Administration
• Updated: 2025-07-17

This far encounter data set consists of electron and ion counting rate data from the Low Energy Charged Particle (LECP) experiment on Voyager 1 while the spacecraft was within the vicinity of...

• Organization: National Aeronautics and Space Administration
• Updated: 2025-07-17

This far encounter step data set consists of the counting rate and flux data for electrons and ions from the Low Energy Charged Particle (LECP) experiment on Voyager 1 while the spacecraft was...

• Organization: National Aeronautics and Space Administration
• Updated: 2025-07-17

This far encounter data set consists of electron and ion counting rate data from the Low Energy Charged Particle (LECP) experiment on Voyager 2 while the spacecraft was within the vicinity of...

• Organization: National Aeronautics and Space Administration
• Updated: 2025-07-17

This far encounter step data set consists of the counting rate and flux data for electrons and ions from the Low Energy Charged Particle (LECP) experiment on Voyager 1 while the spacecraft was...

• Organization: National Aeronautics and Space Administration
• Updated: 2025-07-17

This far encounter step data set consists of the counting rate and flux data for electrons and ions from the Low Energy Charged Particle (LECP) experiment on Voyager 2 while the spacecraft was...

• Organization: National Aeronautics and Space Administration
• Updated: 2025-07-17

This far encounter step data set consists of the counting rate and flux data for electrons and ions from the Low Energy Charged Particle (LECP) experiment on Voyager 2 while the spacecraft was...