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Full Color Slides of E-T Spectrograms for Plasma Measurements


Availability: At NSSDC, Ready for Offline Distribution (or Staging if Digital)

Time span: 1973-11-15 to 1992-12-30


This data set of 35-mm slides consists of experimenter-supplied, full-color, E-t (energy-time) spectrograms for plasma measurements with the LEPEDEA on board IMP 8, taken during IMP's magnetotail orbit phases. As is more fully described in JGR, 81, 5859, the spectrograms display the detector responses to proton intensities as functions of energy (ordinate) and time (abscissa) for four directions, or sectors, of the instrument fields of view. These detector responses are color coded. The spectrograms also summarize the angular distributions of proton intensities as functions of the directions of the field of view. Also shown are the angular distributions of electron intensities that display the responses of the electron channels of the LEPEDEA, which are averaged over the directions of the fields of view. Each slide covers an entire day. These spectrograms are also available from as GIF files.

Alternate Names

  • Color E-T Spectrograms, Slides


  • Space Physics: Magnetospheric Studies


  • 73-078A-04C

Additional Information



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



NameRoleOriginal AffiliationE-mail
Prof. Louis A. FrankGeneral ContactUniversity of
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