hand-held magnetometer

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• Magnetometer — A magnetometer is a measuring instrument used to measure the strength or direction of a magnetic field either produced in the laboratory or existing in nature. Some countries such as the USA, Canada and Australia classify the more sensitive… …   Wikipedia

• 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… …   Wikipedia

• Compass — This article is about the direction finding instrument used in navigation. For other uses, see Compass (disambiguation). A simple dry magnetic pocket compass …   Wikipedia

• Metal detector — A U.S. Army soldier uses a metal detector to search for weapons and ammunition in Iraq A metal detector is a device which responds to metal that may not be readily apparent. The simplest form of a metal detector consists of an oscillator… …   Wikipedia

• Diving equipment — Surface supplied commercial diving equipment on display at a trade show Diving equipment is equipment used by underwater divers for the purpose of facilitating diving activities. This may be equipment primarily intended for this purpose, or… …   Wikipedia

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• Digital compass — A digital compass may be either a magnetometer (as in some hand held GPS units) or a fibre optic gyrocompass (as in a ship s navigation system). Categories: Navigation …   Wikipedia

• Mathematics and Physical Sciences — ▪ 2003 Introduction Mathematics       Mathematics in 2002 was marked by two discoveries in number theory. The first may have practical implications; the second satisfied a 150 year old curiosity.       Computer scientist Manindra Agrawal of the… …   Universalium

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• Lunar Prospector — LunarOrbiter Name=Lunar Prospector Organization=NASA Contractors=Discovery Program MissionType=Planetary Science LaunchDate=January 7, 1998 at 02:28:44 UTC LaunchVehicle=Athena II MissionHighlight=Entered lunar orbit January 11, 1998, 10:28 UTC… …   Wikipedia

• geomagnetic field — Magnetic field associated with the Earth. It is essentially dipolar (i.e., it has two poles, the northern and southern magnetic poles) on the Earth s surface. Away from the surface, the field becomes distorted. Most geomagnetists explain the… …   Universalium