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Pioneer 11 Charged Particle Composition (CPC) 1-Hour Count Rates

Published by SPDF | National Aeronautics and Space Administration | Catalog Last Checked: October 07, 2026 at 12:36 AM | Dataset Last Updated: September 28, 2026
Hourly count rates from U. Chicago Charged Particle Composition Investigation (CPC) carried on Pioneer 11. There are four rates each, for protons and alpha particles, at 11-20, 20-24, 24-29, 29-67 MeV/n. There are four additional count rates, corresponding to 7-17 MeV electrons, Z>=1 ions with E>67 MeV/n, Z>5 ions with E>67 MeV/n, and 2 x minimizing ionizing particles. The data are ftp-accessible in annual ASCII files and via FTPBrowser. The hourly averages were computed from 15-min data (counts, accumulation times, PHA-based box counts, etc.) that are also available via ftp from nssdcftp.gsfc.nasa.gov.

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Complete Metadata
@type dcat:Dataset
accessLevel public
bureauCode 
[
  "026:00"
]
contactPoint 
{
  "fn": "NASA Space Physics Data Facility",
  "@type": "vcard:Contact",
  "hasEmail": "mailto:NASA-SPDF-Support@nasa.onmicrosoft.com"
}
description Hourly count rates from U. Chicago Charged Particle Composition Investigation (CPC) carried on Pioneer 11. There are four rates each, for protons and alpha particles, at 11-20, 20-24, 24-29, 29-67 MeV/n. There are four additional count rates, corresponding to 7-17 MeV electrons, Z>=1 ions with E>67 MeV/n, Z>5 ions with E>67 MeV/n, and 2 x minimizing ionizing particles. The data are ftp-accessible in annual ASCII files and via FTPBrowser. The hourly averages were computed from 15-min data (counts, accumulation times, PHA-based box counts, etc.) that are also available via ftp from nssdcftp.gsfc.nasa.gov.
distribution 
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  },
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    "mediaType": "application/octet-stream",
    "downloadURL": "https://helio.data.nasa.gov/dataset/Pioneer11_CPC_PT1H"
  },
  {
    "@type": "dcat:Distribution",
    "format": "BIN",
    "mediaType": "application/octet-stream",
    "downloadURL": "https://hpde.io/NASA/NumericalData/Pioneer11/CPC/PT1H"
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    "mediaType": "text/html",
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  },
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    "format": "BIN",
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  },
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    "@type": "dcat:Distribution",
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]
identifier https://doi.org/10.48322/dnz4-5s75
keyword 
[
  "energeticparticles"
]
landingPage https://doi.org/10.48322/dnz4-5s75
license https://www.usa.gov/government-works
modified 2026-09-28
programCode 
[
  "026:000"
]
publisher 
{
  "name": "SPDF",
  "@type": "org:Organization"
}
theme 
[
  "Heliophysics"
]
title Pioneer 11 Charged Particle Composition (CPC) 1-Hour Count Rates

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