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Vector Helium Magnetometer

NSSDC ID: 1978-079A-02
Mission Name: ISEE 3
Principal Investigator: Dr. Edward J. Smith


The instrumentation for this experiment consisted of a boom-mounted triaxial vector helium magnetometer. Measurements were made of the steady magnetic field and its low-frequency variations. Eight field amplitude ranges (minus to plus 4, 14, 42, 144, 640, 4000, 22,000, and 140,000 nT) were available. The instrument ranged up and down automatically or could be commanded into a specific range. The field equivalent noise power spectral density was 2E-4 nT squared per Hz (independent of frequency), or 0.01 nT rms in the passband 0 to 0.5 Hz. A single-axis spectrum analyzer measured fluctuations parallel to the spacecraft spin axis in three frequency bands centered at 0.33, 3.2, and 8.8 Hz.

Facts in Brief

Mass: 3.0 kg
Power (avg): 4.3 W

Funding Agency

  • NASA-Office of Space Science (United States)


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

Additional Information

Questions or comments about this experiment can be directed to: Dr. H. Kent Hills.



NameRoleOriginal AffiliationE-mail
Dr. James A. SlavinOther InvestigatorNASA Goddard Space Flight
Dr. Leverett Davis, Jr.Other InvestigatorCalifornia Institute of Technology 
Dr. Douglas E. JonesOther InvestigatorBrigham Young University 
Prof. George L. SiscoeOther InvestigatorUniversity of California, Los
Dr. Bruce T. TsurutaniOther InvestigatorNASA Jet Propulsion
Dr. Edward J. SmithPrincipal InvestigatorNASA Jet Propulsion

Selected References

Frandsen, A. M. A., et al., ISEE-C vector helium magnetometer, IEEE Trans. Geosci. Electron., GE-16, No. 3, 195-198, July 1978.

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