New Design Option of a Vertical Gravity Gradiometer

The article considers a new design option of a vertical gravity gradiometer. The main idea is to use a height-separated test mass and float, stiffly connected to each other and placed in a fluid, and the weight of the system is balanced by the buoyance force. Changing the gravity gradient results in...

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Bibliographic Details
Published in:Seismic instruments 2021-03, Vol.57 (2), p.203-208
Main Authors: Manukin, A. B., Kalinnikov, I. I., Kazantseva, O. S., Matyunin, V. P.
Format: Article
Language:English
Subjects:
Design
Earth and Environmental Science
Earth Sciences
Geophysics/Geodesy
Gradiometers
Gravity
Magnetic measurement
Measuring instruments
Seasonal variations
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Summary:The article considers a new design option of a vertical gravity gradiometer. The main idea is to use a height-separated test mass and float, stiffly connected to each other and placed in a fluid, and the weight of the system is balanced by the buoyance force. Changing the gravity gradient results in small movement of the system, which is connected to the body by a soft spring. When measured by a sensor, this movement contains information about the gradient value. Despite the external simplicity of the idea, its implementation is quite difficult due to the influence of temperature variations. We discuss four options for creating the device, which demonstrate the fundamental possibility of implementing a measuring device with a resolution of hundredths to tenths of an eotvos.
ISSN:0747-9239
1934-7871
DOI:10.3103/S0747923921020286