Flexible correction of 3D non-linear drift in SPM measurements by data fusion

Author(s):  
Johannes Degenhardt ◽  
Rainer Tutsch ◽  
Gaoliang Dai
Keyword(s):  
2011 ◽  
Vol 13 (8) ◽  
pp. 1531-1537 ◽  
Author(s):  
Nirmal Kumar Datta ◽  
Kashinath Chatterjee ◽  
Manas Ghosh
Keyword(s):  

2020 ◽  
Author(s):  
Benjamin Fores ◽  
Arnaud Watlet ◽  
Michel Van Camp ◽  
Olivier Francis

<p>Spring-based gravimeters are light and easy to install, with a precision around 5 μGal/√Hz. However, they are still not used for long-term gravity monitoring. The main reason for that is the non-linear drift of those instruments, which is very difficult to correct without removing geophysical signals. We will show that when the tilt is actively controlled, a gPhone spring-based gravimeter shows a quasi-linear drift and can reach a long-term stability at the µGal level.</p><p>This allows experiments such as the one in the Rochefort Cave Laboratory (Belgium). Thanks to the size of the gPhone and its low facility requirements, a monitoring from inside a cave was possible. Coupled with another gravity monitoring at the surface, it reveals new information on the local hydrology of this karstic site.</p>


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