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Plasmaspheric Electric Fields 3 Second Averaged Data


Availability: Archived at NSSDC, accessible from elsewhere

Time span: 1977-12-02 to 1978-11-30


This data set comprises all the usable data from this instrument in the plasmasphere (mostly inside L of 6) for the time period covered. The electric fields are given in a coordinate system corotating with an observer on the earth. Several selections were made to avoid any data that might be unreliable. The data that were kept were generally from regions of electron densities greater than 30 to 50/cm**3. The components of the electric field in the spin plane were measured. The third component (solar ecliptic Z) was calculated assuming that the scalar product of E and B is zero. The resulting vector electric field was then transformed into radially outward and azimuthally eastward components perpendicular to B. These fields were then projected to the magnetic equatorial plane and to the ionosphere, assuming that the magnetic field lines were equipotentials and that the magnetic field was a dipole. When projected to the northern hemisphere ionosphere these components become the northward and eastward electric fields. The data items contained in this data set are time, L value, magnetic local time, radial and azimuthal electric field components in the equatorial plane, and the ionospheric projections (north and east) of these. Time difference between data points is 3 s. These data are on binary magnetic tape created on an IBM 360 computer.

Data are available online at

Alternate Names

  • 3-S Avgd Plasmaspheric Elec.Field


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


  • 77-102A-11D

Additional Information



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



NameRoleOriginal AffiliationE-mail
Dr. Nelson C. MaynardGeneral ContactNASA Goddard Space Flight
Mr. Robert M. CandeyGeneral ContactNASA Goddard Space Flight
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