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36.864-sec Averaged Search-Coil Magnetometer Data


Availability: At NSSDC, Ready for Offline Distribution (or Staging if Digital)

Time span: 1964-09-23 to 1967-11-17


This experimenter-generated magnetometer data set, on 29 7-track, 556-bpi, BCD magnetic tapes, contains 36.864-s-averaged search coil magnetometer data from all experiment modes. Each file contains, in about 1600 records, data from one orbit, with the possibility of some overlap at the end of each file. An index to the time and size of each file is contained on microfilm in data set 64-054A-01D. In each record are day of year, millisecond of day, and the averaged vector field noise amplitudes for the 10-, 30-, 100-, 300-, and 800-Hz center frequency channels. For telemetry rates of 1, 8, and 64 kbs, each record contains 147.5, 18.4, and 2.3 s of data, respectively. Real-time data and tape-recorded playback data were processed separately. Though the tapes contain consecutive data, merging of these two types of data was not performed. As the instrument responded differently to broadband and monotone signals, it was not possible to calibrate the measured field signal magnitudes without independent knowledge of the nature of the measured signal. In any case, these data are useful as indicators of the times and places of magnetic activity, and may be used to identify shock fronts, magnetopause crossings, plasmapause crossings, the nature of magnetospheric waves, etc., to the nearest minute.

Alternate Names

  • 37-s Search Coil Mag. Data
  • Triaxial Search Coil Magnetometer Data


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


  • 64-054A-01A

Additional Information



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



NameRoleOriginal AffiliationE-mail
Mr. Joseph D. MeansData ProviderUniversity of California, Los
Mr. Joseph D. MeansGeneral ContactUniversity of California, Los

Selected References

  • Means, J. D., and C. T. Russell, Data processing system for the OGO-1 and OGO-3 search coil magnetometer experiments, Unpublished, Unnumbered, Undated.
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