The location of subterranean voids using tensor gravity gradiometry

Lockerbie, N. A.

doi:10.1088/0264-9381/31/6/065011

Cited by 3 publications

(1 citation statement)

References 15 publications

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“…Firstly, one of the major applications of FTGs is for airborne mineral prospecting, which is very different from the application we are considering for the gravitational eye. However, one method of signal processing that has been suggested for FTG data [85][86][87] is worth commenting on here because there is some potential commonality with the measurements in underground environments envisaged in this paper. Consider the case where a 1D line of data is produced, this could be in a borehole gravity survey, for example.…”

Section: Discussionmentioning

confidence: 99%

A gravitational eye: a method for extracting maximum information from gravitational potentials

de Villiers,

Vovrosh,

Ridley

et al. 2024

Meas. Sci. Technol.

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Gravity measurements have uses in a wide range of fields including geological mapping and mine-shaft inspection. The specific application in question sets limits on the survey and the amount of information that can be obtained. For example, in a conventional gravity survey at the Earth’s surface a gravimeter is translated on a two-dimensional planar grid taking measurements of vertical component of gravity. If, however, the survey points cannot be chosen so freely, for example if the gravimeter is constrained to operate in a tunnel where only a one-dimensional line of data could be taken, less information will be obtained. To address this situation, we investigate an alternative approach, in the form of an instrument which rotates around a central point measuring the gravitational potential on the boundary of a sphere around the centre of the instrument. The ability to record additional components of gravity by rotating the gravimeter will give more information than obtained with a single measurement traditionally taken at each point on a survey, consequently reducing ambiguities in interpretation. We term a device which measures the potential, or its radial derivatives, around the surface of a sphere a gravitational eye. In this article we explore ideas of resolution and propose a thought experiment for comparing the performance of diverse types of gravitational eye. We also discuss radial analytic continuation towards sources of gravity and the resulting resolution enhancement, before finally discussing the possibility of using cold-atom gravimetry and gradiometry to construct a gravitational eye. If realised, the gravitational eye will offer revolutionary capability enabling the maximum information to be obtained about features in all directions around it.

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Section: Discussionmentioning

confidence: 99%