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GSFC Magnetometer

NSSDC ID: 1966-058A-01
Mission Name: Explorer 33
Principal Investigator: Dr. Norman F. Ness


The instrumentation for this experiment consisted of a boom-mounted triaxial fluxgate magnetometer. Each of the three sensors had a range of minus to plus 64 nT and a digitization resolution of minus to plus 0.25 nT. Zero-level drift was checked by periodic reorientation of the sensors. Spacecraft fields at the sensors were not greater than the digitization uncertainty. One vector measurement was obtained each 5.12 s. The bandpass of the magnetometer was 0 to 5 Hz, with a 20-dB per decade decrease for higher frequencies. The detector functioned well between launch and October 10, 1968, when the dc power converter failed. No useful data were obtained after that date. For further details, see Behannon, J. Geophys. Res., v. 73, p. 907, 1968. NSSDC has all the useful data that now exist from this investigation. Hourly averaged interplanetary data also exist as part of data sets in the NSSDC supplementary data file.

Alternate Names

  • Triaxial Fluxgate Magnetometer

Facts in Brief

Power (avg): 1.0 W
Bit rate (avg): 0.0047 bps

Funding Agency

  • NASA-Office of Space Science Applications (United States)


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

Additional Information

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



NameRoleOriginal AffiliationE-mail
Dr. Norman F. NessPrincipal InvestigatorNASA Goddard Space Flight
Dr. Kenneth W. BehannonOther InvestigatorNASA Goddard Space Flight Center 
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