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Instrument

EFM
Electric Field Mill

An Electric Field Mill (EFM) is an in situ airborne and ground-based electric sensor designed and built at NASA Marshall Space Flight Center (MSFC). It measures the full vector components of the atmospheric electric field and provides details about the electrical structure within and around a storm. EFMs can detect both intracloud and cloud-to-ground lightning and can operate during large thunderstorm fields (thousands of volts/meter). An EFM has a typical time response of about 10 Hz.

Image of an aiborne EFM
NASA's DC-8 flying laboratory passes Antarctica's tallest peak, Mount Vinson, on Oct. 22, 2012, during a flight over the continent to measure changes in the massive ice sheet and sea ice. Credit: NASA/Michael Studinger (Photography courtesy NASA Images)

Instrument Details

Magnetic/Electric
Earth Science > Atmosphere > Atmospheric Electricity > Electric Field
Earth Science > Atmosphere > Atmospheric Electricity
Earth Science > Atmosphere > Atmospheric Electricity > Lightning
Land Surface, Troposphere
50 Hz
N/A
N/A
https://doi.org/10.1175/JTECH2039.1External Link

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