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the Eriskay and Eday instruments
ERISKAY
and EDAY are two instruments to be carried by stratospheric balloons to
measure atmospheric and magnetospheric electric fields. Ground based measurements
of the air-earth current are also made
at the launch site.
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ERISKAY : a 4-probe instrument to measure all 3 vector components of the electric field, incorporating also a 3-axis magnetometer. It is designed to measure the atmospheric (vertical) electric field during ascent and descent and the magnetospheric (horizontal) electric field at float. |
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EDAY: a simpler version which measures only the atmospheric vertical electric field, at heights above the tropopause. |
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Skerries project page