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Original Reduced Electron Spectrometer Accumulated Count Data


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

Time span: 1964-09-07 to 1967-12-06


This accumulated electron spectrometer count data set is on experimenter-generated, IBM 7094 binary magnetic tapes. Each tape contains one file of reduced data, made up of an arbitrary number of records and covering an arbitrary amount of time. The records are of variable length: 21 to 1000 48-bit words. The first 20 of these words constitute a header that indicates, among other things, the rate at which the data were telemetered, the start and end times of the record, and the number of words in the record. The data words are grouped into 40-word data frames within which the data from each of the 5 spectrometer channels are presented four times, and background counts from each channel are presented three times. The remaining 5 words are synchronization words. Each data word indicates the channel and whether the data are analysis or background counts, the data in the form of accumulated counts, and the starting time of the accumulation cycle. Only nonzero data are presented. The accumulated counts may be converted to a flux value by using conversion factors supplied by the experimenter. All the records have been time ordered according to start time of the record, so considerable overlap may exist in the time covered by consecutive records.

Alternate Names

  • Reduced Count Data, Conden Data


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


  • 64-054A-21C

Additional Information



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



NameRoleOriginal AffiliationE-mail
Dr. Karl A. PfitzerGeneral ContactMcDonnell-Douglas
Dr. John R. WincklerGeneral ContactUniversity of Minnesota

Selected References

  • Katz, L. G., Original reduced count rates on magnetic tape (64-054A-21C), data set section (NSSDC information packet), NASA-GSFC, NSSDC, Unnumbered, Greenbelt, MD, Mar. 1971.
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