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Merged Hourly Averaged Field and Plasma Data


Availability: Archived at NSSDC, accessible from elsewhere

Time span: 1976-01-15 to 1980-03-04


These merged hourly averaged magnetic field and plasma data are on binary magnetic tape created on an IBM 360 computer. The first file consists of ASCII card images describing the data files. Each 30-word data record contains spacecraft identification; data code (1 = plasma data only, 2 = magnetometer data only, and 3 = both); year, day, and hour of the data interval; cumulative day and fractional day since January 1, 1972; spacecraft heliocentric distance (AU); Carrington rotation number and longitude of the subspacecraft point; earth-sun-spacecraft separation angle; components of the interplanetary magnetic field; magnitude of the interplanetary magnetic field vector; standard deviation; solar wind bulk flow speed; radial component of the proton temperature; solar wind number density; standard deviation of bulk flow speed, proton temperature, and proton number density; proton flow elevation angle and azimuth angle; elevation and azimuth angles of the magnetic field vector in the solar ecliptic coordinate system; and the cumulative word count.

Data are available online at

Alternate Names

  • Merged Hourly Avgd Field + Plasma


  • Space Physics: Heliospheric Studies


  • 74-097A-01C
  • 74-097A-09B
  • 76-003A-01C
  • 76-003A-09B

Additional Information



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



NameRoleOriginal AffiliationE-mail
Dr. John W. FreemanData ProviderNASA Goddard Space Flight Center
Mr. Robert M. CandeyGeneral ContactNASA Goddard Space Flight
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