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Magnetic Fields Experiment

NSSDCA ID: 1972-073A-01

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


This experiment consisted of a boom-mounted triaxial fluxgate magnetometer designed to study the interplanetary and geomagnetic tail magnetic fields. Each sensor had three dynamic ranges; plus or minus 12, plus or minus 36, and plus or minus 108 nT. With the aid of a bit compaction scheme (delta modulation), 25 vector measurements were made and telemetered per second. Full-word vectors were telemetered with 320-ms resolution. The instrument functioned normally from turn-on (September 23, 1972) to December 28, 1972, when the flipper mechanism failed. This rendered somewhat more difficult the determination of zero-level drift in the spin-axis sensor. The instrument continued in this state until April 4, 1973, when instrument malfunction caused a series of spacecraft under-voltage turnoffs. Data were not obtained after this time.

Alternate Names

  • IMP-H/MagneticFieldsExperiment


  • 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
Mr. Clell S. ScearceOther InvestigatorNASA Goddard Space Flight Center
Mr. Joseph B. SeekOther InvestigatorNASA Goddard Space Flight Center
Dr. Norman F. NessPrincipal InvestigatorNASA Goddard Space Flight Center
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