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Pioneer 11 HVM 1-Minute Interplanetary Cruise Data


Availability: Archived at NSSDC, accessible from elsewhere

Time span: 1973-04-01 to 1976-12-01


This data collection from the Pioneer 11 Helium Vector Magnetometer (HVM) consists of one minute averages of vector components and scalar magnitudes of the interplanetary magnetic field. The three components (Br, Bt, Bn) are given in the RTN coordinate system and all magnetic fields are expressed in nanotelsa units. The scalar magnitudes (B) are averages of higher resolution scalar magnitudes. The time tag for each one-minute interval is the midpoint of the averaging interval in SCET-UT (Spacecraft Event Time - UT). The averages were originally calculated over one-minute intervals in Ground Received Time, and the midpoints have been converted to SCET-UT. The file LIGHTTIME.P11 contains daily values for the one-way light-time delay. No records are written for data gaps. Most files cover 28 or 35 days, but there are a number of shorter files, particularly at year boundaries. In 1973 and 1974, each file covers 28 or 35 days, except for short files at year-end. Later files cover approximately 60 days. Data for the Jupiter encounter, days 328-348 of 1974, and for the Saturn encounter, days 242-251 of 1979, are not included. The RTN system is fixed to the sun-spacecraft line and aligned with the solar heliographic equator. The R axis is the radial direction to the spacecraft, the T axis is the cross product of the solar rotation axis and the R axis, and N is the cross product of R and T. An extract from SFDU metadata for data set 73-019A-01H gives details of the instrument characteristics and data processing applicable to this data set.

This collection is available on-line at:

Alternate Names

  • 1-Min HVM Interpl Cruise Data


  • Space Physics: Heliospheric Studies


  • 73-019A-01J

Additional Information



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



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

Selected References

  • Smith, E. J., et al., Measuring the magnetic fields of Jupiter and the outer solar system, IEEE Trans. Magnet., MAG-11, No. 4, 962-980, dio:10.1109/TMAG.1975.1058779, July 1975.
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