The THEMIS Electric Field Instrument (EFI) measures the electric fields in three directions. One pair of sensors is deployed to 20 meters, the other pair to 25 meters. Two stiff telescopic booms extend sensors perpendicular to the four spinning cables and along the probe's spin axis.
Sensors - Space Sciences Laboratory, University of California, Berkeley. Data Processing - Laboratory for Atmospheric and Space Physics (LASP), University of Colorado, Boulder
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|Table of EFI Parameters|
|Frequently Asked Questions|
|EFI Modes and Data Products|
|How to Select an Appropriate Data Type|
|Sources of Non-Ideal Instrument Performance|