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Volume 66 Number 1
  • E-ISSN: 1365-2478

Abstract

ABSTRACT

Significant hysteresis effects after transport in the upright position are found during measurement for the purpose of calibration of Scintrex CG‐3M gravimeters serial numbers 4372 and 4373. The effects amount to 0.60 and 0.15 μms−2 during the first 10 minutes and an additional 0.35 and 0.10 μms−2 during the next 10 minutes after transport for gravimeters 4372 and 4373, respectively. Such significant and not completely homogenous effects do not completely cancel out when forming gravity differences. An iterative MATLAB algorithm has been developed that models hysteresis effects using exponential functions that account for shifts in time and eliminates the hysteresis effects from the measurements. The method facilitates determination of an exponential function of hysteresis from multiple observation series with different unknown offsets and significant noise that prevents the application of conventional methods. Hysteresis elimination from measurements for the purpose of calibration resulted in (mostly significant) increases in the precision of adjusted calibration constants for both gravimeters. It is shown that, in order to obtain reasonable results, modelling the hysteresis effects should be based on approximately 30 minutes of readings. Finally, one can conclude that hysteresis effects surely do build up during transport, contrary to statements by Scintrex.

© 2018 European Association of Geoscientists & Engineers © 2017 European Association of Geoscientists & Engineers
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/content/journals/10.1111/1365-2478.12557
2017-09-11
2024-04-18

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Modelling hysteresis effect in Scintrex CG‐3M gravity readings
Geophysical Prospecting 66, 257 (2018); https://doi.org/10.1111/1365-2478.12557
/content/journals/10.1111/1365-2478.12557
/content/journals/10.1111/1365-2478.12557
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  • Article Type: Research Article
Keyword(s): Data processing; Gravimeter calibration; Gravimetry

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