enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Magnetometer - Wikipedia

    en.wikipedia.org/wiki/Magnetometer

    Laboratory magnetometers are used to measure the magnetic field of materials placed within them and are typically stationary. Survey magnetometers are used to measure magnetic fields in geomagnetic surveys; they may be fixed base stations, as in the INTERMAGNET network, or mobile magnetometers used to scan a geographic region.

  3. Magnetic survey (archaeology) - Wikipedia

    en.wikipedia.org/wiki/Magnetic_survey_(archaeology)

    Magnetometers used in geophysical survey may use a single sensor to measure the total magnetic field strength, or may use two (sometimes more) spatially separated sensors to measure the gradient of the magnetic field (the difference between the sensors). In most archaeological applications the latter (gradiometer) configuration is preferred ...

  4. Aeromagnetic survey - Wikipedia

    en.wikipedia.org/wiki/Aeromagnetic_survey

    An aeromagnetic survey is a common type of geophysical survey carried out using a magnetometer aboard or towed behind an aircraft. The principle is similar to a magnetic survey carried out with a hand-held magnetometer, but allows much larger areas of the Earth's surface to be covered quickly for regional reconnaissance.

  5. Geophysical survey - Wikipedia

    en.wikipedia.org/wiki/Geophysical_survey

    Geophysical surveys are used in industry as well as for academic research. The sensing instruments such as gravimeter, gravitational wave sensor and magnetometers detect fluctuations in the gravitational and magnetic field. The data collected from a geophysical survey is analysed to draw meaningful conclusions out of that.

  6. Magnetic anomaly detector - Wikipedia

    en.wikipedia.org/wiki/Magnetic_anomaly_detector

    The term typically refers to magnetometers used by military forces to detect submarines (a mass of ferromagnetic material creates a detectable disturbance in the magnetic field). Military MAD equipment is a descendant of geomagnetic survey or aeromagnetic survey instruments used to search for minerals by detecting their disturbance of the ...

  7. Magnetic anomaly - Wikipedia

    en.wikipedia.org/wiki/Magnetic_anomaly

    It is used in most ground surveys except for boreholes and high-resolution gradiometer surveys. [ 2 ] : 163–165 [ 3 ] : 77–78 Optically pumped magnetometers , which use alkali gases (most commonly rubidium and caesium ) have high sample rates and sensitivities of 0.001 nT or less, but are more expensive than the other types of magnetometers.

  8. Earth's magnetic field - Wikipedia

    en.wikipedia.org/wiki/Earth's_magnetic_field

    Governments sometimes operate units that specialize in measurement of the Earth's magnetic field. These are geomagnetic observatories, typically part of a national Geological survey, for example, the British Geological Survey's Eskdalemuir Observatory. Such observatories can measure and forecast magnetic conditions such as magnetic storms that ...

  9. International Real-time Magnetic Observatory Network

    en.wikipedia.org/wiki/International_Real-time...

    The International Real-time Magnetic Observatory Network (INTERMAGNET) is a world-wide consortium of institutes operating ground-based magnetometers recording the absolute level of the Earth's time-varying magnetic field, [2] [3] [4] to an agreed set of standards. INTERMAGNET has its roots in discussions held at the Workshop on Magnetic ...