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Counting Rates of Heavy Primary Cosmic Rays


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

Time span: 1959-10-13 to 1960-05-31


This data set of ion chamber counts is on one 7-track, 556-bpi, binary magnetic tape produced at NSSDC, on an IBM 7094 computer. Approximately 17,250 punched cards submitted by the experimenter were used to generate the tape. The investigator presented the data in this tape data set by defining "boxes" of 5-deg latitude, 10-deg longitude, and 100-km thickness. Data counts obtained during a given spacecraft pass through a given box were accumulated from the 15-s counts. Each 80-character logical record is a card image, and contains the time of measurement, the geographic latitude, longitude, and altitude of the box, accumulated counts for particles with atomic number (Z) greater than 5, accumulation time (time spacecraft is in box, typically 1 to 2 min), and computed and correlative data. The latter includes magnetic cutoff rigidity, neutron monitor data, Kp and Rz indices, and the 10.7-cm solar flux. It should be noted that no data from the Z above 8 or Z above 15 channels are included. Data are contained for the following three time periods -- October 13, 1959, to October 24, 1959; November 1, 1959, to March 15, 1960; and April 12, 1960, to May 31, 1960. In each interval, coverage is about 50% complete.

Alternate Names

  • Ion Chamber Counts


  • Space Physics: Heliospheric Studies


  • 59-009A-03A

Additional Information



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



NameRoleOriginal AffiliationE-mail
Dr. Martin A. PomerantzGeneral ContactBartol Research Foundation

Selected References

  • Explorer 7 heavy primary cosmic ray experiment, NASA-GSFC, NSSDC 65-01, Greenbelt, MD, Dec. 1965.
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