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Instrument details
Acronym
EFD
Full name
Electric Field Detector
Purpose
To study the coupling of the E-Field in the near-Earth magnetosphere and in the ionosphere (in particular during substorms)
Short description
Electric field antenna coupled to an electron beam device. Range: 0.01-10 mV/m
Background
Part of a package of instruments to observe the Magnetosphere by navigating across its tail
Scanning Technique
Travelling cross the Magnetosphere in a highly-elliptical orbit
Resolution
N/A
Coverage / Cycle
Full magnetospheric volume; sampling at 0.016 s intervals
Mass
Power
Data Rate
Providing Agency
JAXA
Instrument Maturity
Flown on an R&D satellite
Utilization Period:
1992-10-02 to ≥2022
Last update:
2021-12-10
Detailed characteristics
Satellites this instrument is flying on
Note: a red tag indicates satellites no longer operational, a
green tag indicates operational satellites, a blue tag indicates
future satellites
Instrument classification
Solar and space environment monitors Field or radiowave sensor
WIGOS Subcomponents
Subcomponent 2 Electric field sensor [in LEO and cross magnetosphere]
Mission objectives
Tentative Evaluation of Measurements
The following list indicates which measurements can typically be
retrieved from this category of instrument. To see a full Gap Analysis by Variable,
click on the respective variable.
Note: table can be sorted by clicking on the column headers
Variable Relevance for measuring this variable Operational limitations Explanation
Electric Field 1 - primary No specific limitation. Magnetosphere. Electric field, wide dynamic range
Instrument: EFD