NASA Logo, National Aeronautics and Space Administration


Virtual Energetic Particle Observatory - Data Sources

NASA Goddard Space Flight Center

NASA's Space Physics Data Facility

The SPDF is a multi-mission support project of the Heliophysics Science Division (HSD) at NASA's Goddard Space Flight Center. SPDF consists of web-based services for browse survey and higher-level experiment data and trajectories. This Facility supports data as an Active Final Archive from most NASA Heliophysics missions, except for solar imaging, to promote correlative and collaborative research across discipline and mission boundaries.

Principal SPDF data services supporting VEPO include the following:

  • Coordinated Data Analyis Web (CDAWeb)
    Data browse and plotting interface from energetic particle and other data from instruments on current (ACE, Ulysses, Wind, SOHO, STEREO, SAMPEX) and past (IMP-8) heliospheric and various other geospace (e.g., Geotail, Cluster, THEMIS, GOES, LANL, NOAA, Polar, Interball, CRRES) missions.
  • OMNIWeb
    Data browse, plotting, and statistics interface from traditional OMNI and updated OMNI-2 data base for composite proton flux and ancillary hourly, daily, and 27-day average resolution data set from multiple geospace solar wind data sources. Date coverage for proton fluxes extends from 1967 for the Interplanetary Monitoring Platform (IMP 1-8) series to recent L1 monitor data from ACE and Wind.
  • FTPBrowser
    Interface for graphical or digital display and/or retrieval of selected SPDF ftp-accessible data sets in ASCII or g-zipped ASCII formats. Energetic particle data are available from IMP-8, Pioneer 10&11, and Voyager 1&2.
  • SPDF Anonymous-HTTPS
    Main site for retrieval of archival data from U.S. and international heliophysics missions. Holdings currently include SPDF archived data sets. VEPO-related data sets can be found in the "particle" sub-directories of relevant mission directories.
  • Satellite Situation Center Web (SSCWeb)
    Operational unit of SPDF to provide an ephemeris data base for scientific satellites in geocentric or heliocentric orbits which can be used to plan and support analysis of coordinated science observations by multiple satellites. VEPO-related functionality includes the Locator component for tabular listing of spacecraft location data in a variety of coordinate systems and the Query processor for identification of periods when one or more spacecraft are in the same region, e.g. the "interplanetary medium" of the upstream solar wind outside the Earth's magnetosphere.
  • HelioWeb
    Heliocentric trajectories in tabular output format for selected interplanetary spacecraft, planets, and comets in Solar Ecliptic (SE) and Heliographic (HG) (rotating and inertial) coordinate systems. These data are provided at limited radial (1%) and angle (0.1 degree) to support correlative measurements by multiple spacecraft. NASA archival (SPDF) and operational (e.g., JPL HORIZONS System) ephemeris data products should be utilized for applications requiring higher ephemeris resolution.

Solar Heliospheric Observatory (SOHO) Archive Interface

Web interface for main archive and near real-time data with supporting software for scientific analysis from all SOHO instruments including those of VEPO interest: COSTEP (COmprehensive SupraThermal and Energetic Particle) of the University of Kiel, Germany; ERNE (Energetic and Relativistic Nuclei and Electron) of the University of Turku, Finland; CELIAS/MTOF Proton Monitor of the University of Bern, Switzerland.

Stereo Science Center

"One-stop shopping" location for STEREO (Solar TErrestrial RElations Observatory) energetic particle and other science data, observation plans, analysis software, and links to other mission resources from the twin STEREO spacecraft in heliocentric orbits ahead of and behind the Earth. A special "Space Weather Beacon" telemetry stream, relayed through an array of antenna partners coordinated by NOAA, provides near-real-time images, radio, and in-situ data.

Virtual Solar Observatory (VSO)

Virtual observatory interface to SOHO and Stereo mission data products from energetic particle experiments of interest for VEPO.


ACE Science Center (ASC)

Data browse and display interface for energetic particle and other data from the Advanced Composition Explorer (ACE) mission. Primary functions are to handle Level 1 and Browse Data processing for the mission and to distribute higher level science data from ACE to the community. Other functions include preparing all ACE science data for archiving at SPDF and acting as the active archive for this data during the lifetime of the mission. ACE Level 2 data sets submitted to SPDF in Common Data Format (CDF) are now also accessible via CDAWeb.

Ulysses Final Archive (UFA)

The ESA (European Space Agency) archive for Ulysses Data provides an on-line facility to browse and download selected energetic particle and other measurements made by the scientific instruments flown onboard the Ulysses mission to study the heliosphere in three dimensions. Direct access to plots, data files and documentation are provided via web access and anonymous FTP downloads.


Fundamental Technologies, LLC

Scientific research data processing, analysis, and archiving support for energetic particle experiments of the Applied Physics Laboratory Johns Hopkins University on multiple heliospheric missions/experiments including ACE/EPAM, Ulysses/HISCALE, Voyager/LECP, and IMP-8/CPME.

IMP-8 Project Information

IMP-8 Goddard Medium Energy (GME) Experiment

Interface to digital and graphical data for H and He SEP fluxes, plus electrons and rates, H and He Quiet Time Fluxes, and selected instrument rates at time resolutions of thirty minutes, six hours, and/or 24 hours. Full-telemetry-resolution (FTR) products for count rate and pulse height data are also available along with software.

Voyager - the Interstellar Mission

Voyager 1 and 2 Low Energy Charged Particle (LECP) Experiments

Instrument team web site for documentation and FTP data access from the Voyager mission LECP instruments measuring the differential in energy fluxes and angular distributions of ions >30 keV and electrons >20 keV, and the differential in energy ion composition >200 keV/nuc.

Voyager Cosmic Ray Subsystem (CRS)

Data parameter listing and plot interface for six-hour and 26-day averages for fourteen selectable CRS hydrogen or helium ion intensities and for two counting rates. The entire Voyager CRS Archive data base consisting of 19 proton or helium flux channels and 164 rates as 15-minute, 6-hour, and daily averages is also available.

Space Physics Data System University of New Hampshire Neutron Monitor Data Sets

Web interface now operated at the University of New Hamshire for tabular ASCII data and plots from the former University of Chicago neutron monitors at Climax, Colorado (IGY, 1951-present), Hunacayo, Peru ((IGY, 1953-1992), and Haleakala, Hawaii (IGY and Supermonitor, 1991-present).

University of Delaware Bartol Research Institute Neutron Monitor Program

Web interface operated by the Bartol Research Institute of the University of Delaware for tabular ASCII data from eleven neutron monitor stations: McMurdo, Antarctica; South Pole, Antarctica; Thule, Greenland; Newark, Delaware; Inuvik and Fort Smith, North West Territories, Canada; Peawanuck, Ontario; Nain and Goose Bay, Labrador, Canada; United States Coast Guard Cutters Polar Sea and Polar Star.

Neutron Monitor Database (Europe)

Access portal to data from selected neutron monitor stations in western Europe, Russia, and Asia.

+ Home

Virtual Energetic Particle Observatory