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Original Reduced Pulse Rates


Availability: Archived at NSSDC, accessible from elsewhere

Time span: 1964-09-05 to 1967-12-06


This ionization chamber count rate data set is on 17 experimenter-submitted, 7-track, 556-bpi, binary magnetic tapes written on an IBM 7094 computer. Each tape is made up of an arbitrary number of records and covers an arbitrary amount of time. The records are of variable length, ranging from 21 to 1000 48-bit words. The first 20 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, the number of words in the record, and whether or not the record is in exact time order. Each successive set of three words contains one 10-s-averaged pulse rate. The first word in the set contains the start time of the average in milliseconds of the day. The second word contains the actual duration of the average (which may be shorter than 10 s because of noise filtering), the number of voltage ramps in the average, and whether the average is based on unfiltered ramps, filtered ramps, clock pulses, or analog words. The third word gives the averaged pulse rate in normalized pulses per second. All the records have been ordered by start time of the record, and considerable overlap may exist in the time covered by consecutive records.

Data are available online at

Alternate Names

  • Reduced Pulse Rate,Conden. Data


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


  • 64-054A-20B

Additional Information



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



NameRoleOriginal AffiliationE-mail
Mr. Robert M. CandeyGeneral ContactNASA Goddard Space Flight
Dr. Sharad R. KaneGeneral ContactUniversity of California,
Dr. John R. WincklerGeneral ContactUniversity of Minnesota

Selected References

  • Katz, L. G., Original reduced ionization rates on magnetic tape (64-054A-20B), data set section (NSSDC information packet), NASA-GSFC, NSSDC, Unnumbered, Greenbelt, MD, Mar. 1971.
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