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One-Minute, Hourly and Daily Averaged Vector Helium Magnetometer Data


Availability: At NSSDC, Ready for Electronic Access

Time span: 1978-08-13 to 1990-12-31


This data set consists of restored magnetic tapes that contain magnetic field data. Each day's data are contained in a set of 50 physical records. The first physical record is a 240-byte header record, and the rest consist of 30 240-byte logical records. The 1440 logical records of physical records 2 through 49 contain magnetic field averages for the 1440 min of the day. In physical record 50, the first 24 logical records contain hourly averages, the 25th contains the daily averages, and the last 5 contain blanks. The header record contains the year, day of year, spacecraft position in GSE coordinates at the start of the day's data, and identifying text that notes the coordinate system in which the magnetic field averages are given. Each data record contains: the number of milliseconds for which data exist in the period over which the average was taken; the averaged magnetic field magnitude and its components, and the squares of the magnitude and the components; the averages of the products of each combination of two magnetic field components; and the average of the ratio of each component to the total magnetic field.

Alternate Names

  • 1-min,1-h &1-d Avgd Magnetom Data


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


  • 78-079A-02D

Additional Information



Questions and comments about this data collection can be directed to: Dr. H. Kent Hills



NameRoleOriginal AffiliationE-mail
Dr. Edward J. SmithGeneral ContactNASA Jet Propulsion
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