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One Minute, Hourly, and Daily Averaged Cruise Vector Magnetic Field Data


Availability: Archived at NSSDC, accessible from elsewhere

Time span: 1973-04-06 to 1986-12-31


The vector helium magnetometer data from cruise measurements of the interplanetary magnetic field consist of three field components in the RTN (launch through day 91 of 1976) and Pioneer Ecliptic (thereafter) coordinate system (see experiment description), six covariances, three direction cosines, field magnitude average, and magnitude of the average field. Each tape contains one minute, hourly, and daily averages with an integral number of weeks of data. Each day of data is contained on fifty physical blocks. The first logical record for a day is a 120-byte header containing year, day of year, spacecraft ID, distance of spacecraft and earth from sun, and heliocentric celestial latitude and longitude of spacecraft and earth. The next 1440 logical records contain minute averages. The next 24 logical records contain hour averages followed by one logical record of day averages.

Alternate Names

  • 1 Min, Hourly, Daily Avg. Cruise


  • Space Physics: Heliospheric Studies


  • 73-019A-01B

Additional Information



Questions and comments about this data collection can be directed to: Dr. John F. Cooper



NameRoleOriginal AffiliationE-mail
Dr. Edward J. SmithData ProviderNASA Jet Propulsion
Dr. Edward J. SmithGeneral ContactNASA Jet Propulsion
Mr. Robert M. CandeyGeneral ContactNASA Goddard Space Flight

Selected References

  • Smith, E. J., and J. H. Wolfe, Fields and plasmas in the outer solar system, Space Sci. Rev., 23, No. 2, 217-252, doi:10.1007/BF00173811, 1979.
  • Smith, E. J., Interplanetary magnetic field over two solar cycles and out to 20 au, Adv. Space Res., 9, No. 4, 159-169, doi:10.1016/0273-1177(89)90110-5, 1989.
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