Upgrade of the GOCE level lb gradiometer
can significantly reduce the environmental noise, and the reduction ratio of a typical first-order gradiometer
is believed to reach almost two orders of magnitude , although the noise reduction capability strongly depends on the precision in sensor manufacturing.
To find the "true, disturbance-free" [B.sub.Earth] of equation (3), we have implemented a least-squares fitting-based algorithm, which relies on reading from a gradiometer
placed close to the street, allowing for detection of the passing cars through the "point of symmetry".
We used 204 gradiometer
signals among the 306 channels for data analysis because the characteristics of the gradiometer
and magnetometer sensors differ and the signal-to-noise ratio (SNR) of the gradiometers
is better than that of the magnetometers .
A geophysical investigation was undertaken in 2013 using ground penetrating radar, a fluxgate dual sensor gradiometer
and metal detector to identify footings or soil disturbance.
Operators of the machine - a fluxgate gradiometer
-had to remove all items of metal before starting the work, so findings were not distorted.
' - the sensitive instrument measuring gravity in 3D - was the first in space and has mapped variations in Earth's gravity with unrivalled precision.
pick-up coil design for a low field SQUID-MRI system," Magnetic Resonance Materials in Physics, Biology and Medicine, Vol.
This instrument was used with two sensors (in vertical gradiometer
In order to achieve the mission objectives, GOCE satellite is equipped with a high-precision gravity gradiometer
as well as a GPS receiver (ESA, 1999).
CG mobilised its vessel, Surveyor 2, for the works and deployed a variety of sensors including a Geoswath system, a Seapsy gradiometer
, a Geoacoutics sub-bottom profiler and a boomer system.