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Thomas Grubb's company also made various scientific devices for Trinity College in Dublin. In 1839, his company made about twenty sets of magnetometers. [4] These magnetometers were requested by Professor Humphrey Lloyd who was very involved with Grubb's work. He sought Grubb's talents because so he could be close to the creation process and ...
Magnetometers may also be classified by their situation or intended use. Stationary magnetometers are installed to a fixed position and measurements are taken while the magnetometer is stationary. [4] Portable or mobile magnetometers are meant to be used while in motion and may be manually carried or transported in a moving vehicle.
1879: The rules of Hurling first standardised with the foundation of the Irish Hurling Union. [36] 1881: Stoney units discovered by George Johnstone Stoney. [37] 1883: Method of producing electromagnetic waves discovered by George Francis FitzGerald. [38] 1885: Cream cracker invented by Joseph Haughton. [39] 1886: Graphophone invented by ...
Magnetometers, instruments for measuring magnetic fields. Pages in category "Magnetometers" The following 8 pages are in this category, out of 8 total.
The first uses of magnetometers were for the location of ore deposits. Thalen's "The Examination of Iron Ore Deposits by Magnetic Measurements", published in 1879, was the first scientific treatise describing this practical use.
CHAMP, a German satellite, made precise gravity and magnetic measurements from 2001 to 2010. [8] [9] A Danish satellite, Ørsted, was launched in 1999 and is still in operation, while the Swarm mission of the European Space Agency involves a "constellation" of three satellites that were launched in November, 2013. [10] [11] [12]
In 1958 Glenn A. Black and Eli Lilly, following the work of Martin Aitken and his associates at the Oxford University (UK) Archaeometric Laboratory, used proton magnetometers to locate and map buried archaeological features, including iron objects in the soil, thermoremanent magnetization of fired clays, and differences in the magnetic susceptibility of disturbed soils.
The majority of early fluxgate magnetometers on spacecraft were made as vector sensors. However, the magnetometer electronics created harmonics which interfered with readings. Properly designed sensors had feedback electronics to the detector that effectively neutralized the harmonics. Mariner 1 and Mariner 2 carried fluxgate-vector sensor ...