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Instrument

EFCM
Electric Field Change Meter

The Electric Field Change Meter (EFCM) is an airborne in situ electric meter. It is a two-channel (fast and slow) antenna used to measure the changes in the electric field produced by lightning. The fast channel has a sample rate of 10 MHz and is designed to detect the radiative component of the lightning discharge field. The slow channel has a sample rate of 1 MHz and is designed to observe the electrostatic field component. EFCM operates over the 1 Hz-100 kHz frequency range and has a detection limit of 25 km.

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 > Lightning
Earth Science > Atmosphere > Atmospheric Electricity
Earth Science > Atmosphere > Weather Events > Lightning
Troposphere
1 MHz, 10 MHz
25 km
1 Hz-100 kHz
Currently unavailble