Field motion indicator

A single axis magnetic field coil designed to provide a relative indication of motion of the EMDEX in the earth's static magnetic field at the time the EMDEX sampled its coils.

ATTRIBUTE-ACCURACY

Unknown -- may be used as a rough indication of periods when the EMDEX was in motion.

DOMAIN

The digitized value recorded by the EMDEX is an non-negative integer in the range 0 to 255. A value near the center of the range is usually an indication of no detected motion.