New Matching Method for Accelerometers in Gravity Gradiometer [PDF]
Sensors, 2017 The gravity gradiometer is widely used in mineral prospecting, including in the exploration of mineral, oil and gas deposits. The mismatch of accelerometers adversely affects the measuring precision of rotating accelerometer-based gravity gradiometers ...
Hongwei Wei, Meiping Wu, Juliang Cao
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An Aided Navigation Method Based on Strapdown Gravity Gradiometer [PDF]
Sensors, 2021 The gravity gradient is the second derivative of gravity potential. A gravity gradiometer can measure the small change of gravity at two points, which contains more abundant navigation and positioning information than gravity.
Duanyang Gao +4 more
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Frequency Domain Analysis of Partial-Tensor Rotating Accelerometer Gravity Gradiometer [PDF]
Sensors, 2021 The output model of a rotating accelerometer gravity gradiometer (RAGG) established by the inertial dynamics method cannot reflect the change of signal frequency, and calibration sensitivity and self-gradient compensation effect for the RAGG is a very ...
Xuewu Qian +3 more
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Self-Gradient Compensation of Full-Tensor Airborne Gravity Gradiometer [PDF]
Sensors, 2019 In the process of airborne gravity gradiometry for the full-tensor airborne gravity gradiometer (FTAGG), the attitude of the carrier and the fuel mass will seriously affect the accuracy of gravity gradiometry.
Xuewu Qian, Yanhua Zhu
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Scale Factor Calibration for a Rotating Accelerometer Gravity Gradiometer [PDF]
Sensors, 2018 Rotating Accelerometer Gravity Gradiometers (RAGGs) play a significant role in applications such as resource exploration and gravity aided navigation. Scale factor calibration is an essential procedure for RAGG instruments before being used.
Zhongguang Deng +6 more
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Static and dynamic analyses of free-hinged-hinged-hinged-free beam in non-homogeneous gravitational field: application to gravity gradiometry [PDF]
Scientific Reports, 2022 The first analytical evaluation of a free-hinged-hinged-hinged-free beam proposed for use as the primary sensing element of a new gravity gradiometer is presented.
Alexey V. Veryaskin, Thomas J. Meyer
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Tuning the Stiffness Balance Using Characteristic Frequencies as a Criterion for a Superconducting Gravity Gradiometer [PDF]
Sensors, 2018 Tuning the stiffness balance is crucial to full-band common-mode rejection for a superconducting gravity gradiometer (SGG). A reliable method to do so has been proposed and experimentally tested.
Xikai Liu +3 more
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The earth’s gravity field recovery using the third invariant of the gravity gradient tensor from GOCE [PDF]
Scientific Reports, 2021 Due to the independence of the gradiometer instrument’s orientation in space, the second invariant $$I_2$$ I 2 of gravity gradients in combination with individual gravity gradients are demonstrated to be valid for gravity field determination.
Lin Cai +6 more
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Influence of the Injection Bias on the Capacitive Sensing of the Test Mass Motion of Satellite Gravity Gradiometers [PDF]
SensorsThe performance of the capacitive gap-sensing system plays a critical role in a satellite-based gravity gradiometer that is developed using an electrostatic accelerometer.
Hengtong Xu +6 more
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Simultaneously Acquired Magnetoencephalography and Diffuse Optical Tomography Data Reveals Correlated Somatosensory Activity. [PDF]
Hum Brain MappFiberoptic probe for simultaneous high‐density diffuse optical tomography (HD‐DOT) and magnetoencephalography (MEG) was constructed and tested in a somatosensory experiment. Equivalent current dipoles were fitted to the MEG data. SI and SII dipole waveform features were extracted and used to localize correlated hemodynamic activity in the postcentral ...
Autti S +6 more
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