The Navy already uses precision-machined electromechanical gravity gradiometers
to help submarines navigate without noisy sonar.
Researchers around the world are also pursuing the promise of quantum improvements for other instruments, including gyroscopes used in navigation systems, atomic clocks, and gravity-measuring devices, or gradiometers
, that guide oil exploration and geophysical research.
Methods: Magnetocardiographic mapping is performed with a 36-channel unshielded mapping system, based on DC-SQUID sensors coupled to second-order axial gradiometers
(pick-up coil 19 mm and 55-70 mm baselines; sensitivity of 20 fT/[square root of Hz] in above 1 Hz), as part of the electrophysiologic investigation protocol, tailored to the diagnostic need of each arrhythmic patient.
The technique of first choice was magnetometer survey, using Geoscan fluxgate gradiometers
Elekta Neuromag(R) additionally deploys a unique dual sensor system - using both gradiometers
and magnetometers - giving an unmatched representation of brain activity.
Cold atom gravity gradiometers
appear as a promising alternative solution to future Gravity sensing in space.
Although little has changed in the principles behind the operation of gradiometers
Within the same area, sensitive gradiometers
detected magnetic signs of cooking hearths and pot fragments.
Other well-known technologies under consideration are magnetometers and gradiometers
, which discover hidden devices by seeking telltale magnetic anomalies.
Schonstedt has shipped thousands of magnetic locators - known technically as gradiometers
or magnetometers - to the military and its contractors, as well as non-governmental organizations, for use in countries like Iraq, Afghanistan, Kosovo, Lebanon, South Korea, Russia and Vietnam.
The Berlin group measured MCGs using 49 non-contact SQUID gradiometers
, obtaining recordings of MCGs in cardiac patients and normal subjects.
are faster to use than caesium sensors (Erkul et al.