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Triaxial Fluxgate Magnetometer

NSSDCA ID: 1969-053A-11

Mission Name: IMP-G
Principal Investigator:Dr. Norman F. Ness


A boom-mounted triaxial fluxgate magnetometer measured magnetic fields in the interplanetary medium, in the magnetosheath, and in the geomagnetic tail. The magnetometer had dynamic ranges of plus or minus 40 nT and plus or minus 200 nT with respective sensitivities of plus or minus 0.2 nT and plus or minus 1.0 nT. Automatic onboard range selection was included. Measurement of the energy spectra of magnetic field fluctuations was accomplished through a computation of the autocorrelation function in an onboard digital processor. The experiment functioned normally from launch until the spacecraft decayed from orbit (June 21, 1969 to December 23, 1972). NSSDC has all the useful data that exist from this investigation. Hourly averaged interplanetary data also exist as part of data sets in the NSSDC supplementary data file.

Alternate Names

  • IMP-G/TriaxialFluxgateMagnetometer


  • Space Physics: Magnetospheric Studies
  • Space Physics: Heliospheric Studies

Additional Information

Questions and comments about this experiment can be directed to: Coordinated Request and User Support Office



NameRoleOriginal AffiliationE-mail
Dr. Donald H. FairfieldOther InvestigatorNASA Goddard Space Flight
Dr. Norman F. NessPrincipal InvestigatorNASA Goddard Space Flight Center
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