Has the problem of tilt susceptibility of the Scintrex CG-5 gravimeter been solved ?
20/09/2016 | 15:45 | Session 4: New measurement techniques
Author(s): Rene Reudink, Puck Flikweert and Roland Klees
Rene Reudink, Puck Flikweert and Roland Klees
The Scintrex CG-5 gravimeter has become the work horse among the relative gravimeters used in science, engineering and industry. In 2013 an international team of researchers reported about a high tilt susceptibility of the Scintrex CG-5 gravimeters while the instrument is tilted for a while, e.g., when in transit between sites. They demonstrated that the readings of the Scintrex CG-5 may be offset by tens of microGal and that it may take hours before the first reliable reading can be taken, depending on how long the instrument stayed tilted before the measurements started. Moreover, they showed that the tilt sensitivity cannot be detected during operations by checking the readings or by reviewing the recorded data before leaving a site. The team concluded that the tilt susceptibility makes the measurements useless for high- accuracy applications. To mitigate the performance degradation, they recommended to keep the gravimeter in upright position during transits within a few degrees, putting severe constraints on the use of the instrument in many field conditions.
Recently, TU Delft owned a new Scintrex CG-5, which belongs to the latest generation of Scintrex gravimeters. Here we present the results of a series of experiments which have been conducted with the old instrument already used in the earlier study and the new one. Among others, we will answer the question whether the latest generation of Scintrex CG-5 gravimeters still suffer from the high tilt susceptibility.