Receiver

Devices used on the seabed to measure and record electromagnetic signals.

Controlled-source electromagnetic and magnetotelluric (MT) surveying depend on recording high-quality data from high-sensitivity, low-noise receivers. The receivers need

- to measure field strengths that vary greatly in magnitude, from weak naturally occurring MT signals to strong signals when the source passes over the receiver

- high signal-to-noise ratios

- precise signal timing

to be operationally autonomous for several weeks to allow large surveys.