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Magnetotelluric data acquisition (view source)
Revision as of 15:29, 15 December 2014
, 15:29, 15 December 2014→Controlled-source surveys
[[file:applying-magnetotellurics_fig16-4.png|thumb|300px|{{figure number|2}}Typical MT setup for a controlled-source survey.]]
[[file:applying-magnetotellurics_fig16-4.png|thumb|300px|{{figure number|2}}Typical MT setup for a controlled-source survey.]]
The controlled-source system uses a high-power transmitter and motor/generator set to transmit a discrete AC waveform. This signal is transmitted into a grounded dipole typically 600–1,200 m (2,000–4,000 ft) long. The transmitter is normally located 3–6 km (2–4 mi) from the survey line.
The controlled-source system uses a high-power transmitter and motor or generator set to transmit a discrete alternating current waveform. This signal is transmitted into a grounded dipole typically 600–1,200 m (2,000–4,000 ft) long. The transmitter is normally located 3–6 km (2–4 mi) from the survey line.
Normally, only the E<sub>x</sub> (parallel to the transmitter dipole) and H<sub>y</sub> components are measured.
Normally, only the E<sub>x</sub> (parallel to the transmitter dipole) and H<sub>y</sub> components are measured.