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Original Reduced Ion Chamber Pulse Rates


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

Time span: 1966-06-09 to 1968-08-12


This ionization chamber count rate data set is on an experimenter-supplied, binary magnetic tape written on an IBM 7094. Each tape contains one file of reduced data, which is made up of an arbitrary number of records and covers an arbitrary period of time. The records are of variable length, ranging from 21 to 1000 48-bit words. The first 20 of these words constitute a header that indicates 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.


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


  • 66-049A-23B

Additional Information



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



NameRoleOriginal AffiliationE-mail
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 (66-049A-23B), data set section (NSSDC information packet), NASA-GSFC, NSSDC, Unnumbered, Greenbelt, MD, June 1971.

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