Interplanetary Monitoring Platform (IMP-8) Goddard Medium Energy (GME) Experiment Data
Entry ID: IMP8_GSFC

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Summary
Abstract: IMP-8 (IMP-J) was launched by NASA on October 26, 1973 to measure the
magnetic fields, plasmas, and energetic charged particles (e.g.,
cosmic rays) of the Earth's magnetotail and magnetosheath and of the
near-Earth solar wind. IMP-8 continues to operate.

Energetic particle data from the IMP-8 Goddard Medium Energy (GME)
Experiment provide a comprehensive basis for modulation and
acceleration studies at 1 AU and a critical and unique baseline at 1
AU for ongoing studies of cosmic ray modulation and propagation in the
outer heliosphere for Pioneer and Voyager investigations. These
include work at New Mexico State University, the University of New
Hampshire, the University of Maryland, the University of Iowa, Nagoya
University, the University of Tasmania and NASA/Goddard Space Flight
Center.

The GME instrument has provided continuous observations extending over
almost a complete heliospheric cycle from launch in October 1973 and
continues to operate with few problems. When combined with the data
from essentially identical Goddard experiments on IMP 6 and 7, these
cosmic ray and energetic interplanetary particle observations span a
period of 26 years. Data from the GME instrument span an energy range
of 0.5-450 MeV Hydrogen, 2-450 MeV/nuc Helium, ions from Carbon
through the Iron group from several to >100 MeV/nuc and relativistic
electrons. The quality of the IMP 8 GME data in terms of particle and
energy resolution, and sensitivity, for galactic cosmic ray Hydrogen
(2-230 MeV) and Helium (2-450 MeV/nuc) remains comparable to that of
any other cosmic ray experiment flown since 1971.

Some data are available through NSSDC CDAWeb and at the GMER site at
the SPDF. Data at SPDF include:
- Selected instrument rates at 1 hour resolution on (pre-generated
ONLY) 10-day GIF plots
- Selected instrument rates at 1 hour resolution. In 90-day files with
1 file for each rate (typical length 0.1 MByte)
- H and He Fluxes, plus Electrons and Rates at 30 minute resolution
- H, He and Ion Fluxes, plus Electrons and Rates at 6-hour resolution
- Full telemetry resolution data

Data at NSSDC CDAWeb consists of:
- Hourly Averaged High Energy Protons (20- 40 MeV) Data
- PHAS Data: Pulse Height Data from the LED & MED
- MATR Data: Pulse Height Analysis Summary
- Hourly-Averaged High Energy Protons 40-80 MeV Data
- CNTS Data: Count Rates from the VLET, LED, & MED Detectors

See also:
http://nssdc.gsfc.nasa.gov/database/MasterCatalog?sc=1973-078A&ex=9
and
http://spdf.gsfc.nasa.gov/imp8_GME/GME_home.html

Related URL
Link: GET DATA
Description: IMP-8 GME data products at SPDF


Link: GET DATA
Description: IMP-8 GME data via CDAWeb


Link: VIEW PROJECT HOME PAGE
Description: IMP-8 GME data and information


Link: VIEW RELATED INFORMATION
Description: Additional information from NSSDC on IMP-8 GME data


Data Set Citation
Dataset Originator/Creator: IMP-8 GME (GSFC) Team
Dataset Title: IMP-8 CME
Dataset Release Date: 1973
Dataset Release Place: Greenbelt, MD
Dataset Publisher: NASA/GSFC
Online Resource: http://spdf.gsfc.nasa.gov/imp8_GME/GME_home.html


Temporal Coverage
Start Date: 1973-10-30


Location Keywords
SPACE > EARTH MAGNETIC FIELD > HIGH LATITUDE MAGNETOSPHERE
SPACE > EARTH MAGNETIC FIELD > INNER MAGNETOSPHERE
SPACE > EARTH MAGNETIC FIELD > MAGNETOSPHERE (OTHER)
SPACE > EARTH MAGNETIC FIELD > MAGNETOTAIL


Data Resolution
Temporal Resolution: daily, 6-hour, 30-min


Science Keywords
SUN-EARTH INTERACTIONS >SOLAR ENERGETIC PARTICLE FLUX >ALPHA PARTICLE FLUX    [Definition]
SUN-EARTH INTERACTIONS >SOLAR ENERGETIC PARTICLE FLUX >ELECTRON FLUX    [Definition]
SUN-EARTH INTERACTIONS >SOLAR ENERGETIC PARTICLE FLUX >ION FLUX    [Definition]
SUN-EARTH INTERACTIONS >SOLAR ENERGETIC PARTICLE PROPERTIES >PARTICLE COMPOSITION    [Definition]
SUN-EARTH INTERACTIONS >SOLAR ENERGETIC PARTICLE PROPERTIES >PARTICLE DENSITY    [Definition]
SUN-EARTH INTERACTIONS >SOLAR ENERGETIC PARTICLE PROPERTIES >PARTICLE SPEED    [Definition]
SUN-EARTH INTERACTIONS >SOLAR ENERGETIC PARTICLE FLUX >PROTON FLUX    [Definition]


ISO Topic Category
GEOSCIENTIFIC INFORMATION


Platform
IMP-8 >Interplanetary Monitoring Platform-8    [Information]


Instrument
GME >Goddard Medium Energy Experiment (IMP-8)    [Information]


Project
ISTP >International Solar Terrestrial Physics Program    [Information]


Keywords
magnetotail
magnetosheath
magnetopause
bow shock
solar cosmic rays
solar protons
solar electrons
solar ions
IMP-J
Explorer 50


Data Set Progress
IN WORK


Originating Center
NSSDC


Data Center
National Space Science Data Center, Space Science Data Operation Office, Goddard Space Flight Center, NASA    [Information]
Data Center URL: http://nssdc.gsfc.nasa.gov/

Data Center Personnel
Name: NSSDC USER SUPPORT OFFICE
Email: nssdc-request at lists.nasa.gov
Contact Address:
National Space Science Data Center
NSSDC/Code 633.4
NASA/Goddard Space Flight Center
City: Greenbelt
Province or State: MD
Postal Code: 20771
Country: USA


Space Physics Data Facility, Heliospheric Physics Lab, Heliospheric Science Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA    [Information]
Data Center URL: http://spdf.gsfc.nasa.gov/

Data Center Personnel
Name: ROBERT MCGUIRE
Phone: 301-286-7794
Email: robert.e.mcguire at nasa.gov
Contact Address:
NASA
Goddard Space Flight Center
Mailstop 672.0
City: Greenbelt
Province or State: MD
Postal Code: 20771
Country: USA



Distribution
Distribution_Media: online ftp, www
Fees: none


Personnel
ROBERT MCGUIRE
Role: INVESTIGATOR
Phone: 301-286-7794
Email: robert.e.mcguire at nasa.gov
Contact Address:
NASA
Goddard Space Flight Center
Mailstop 672.0
City: Greenbelt
Province or State: MD
Postal Code: 20771
Country: USA



Creation and Review Dates
DIF Creation Date: 2005-01-28
Last DIF Revision Date: 2005-07-29

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