08:45 〜 09:00
[G04-3-02] First year of gravity signal records with the iGrav-027 superconducting gravimeter
The new iGrav-027 superconducting gravimeter was successfully installed in early spring 2016 at the Borowa Gora Geodetic-Geophysical Observatory. Since last decade of April a complete gravity signal is recorded providing high quality gravity data for a wide range of applications. The instrument supplements a A10-020 gravimeter as well as a group of LaCoste&Romberg (LCR) gravimeters operating in the Observatory.
This work presents the results of analysis of gravity signal records with the iGrav-027 from the first year of its operation, starting from the scale factor determination and drift characteristics. Scale factor of the iGrav-027 was determined with the use of data acquired with A10-020 and FG5-230 absolute gravimeters as well as LCR relative gravimeters. The instrumental drift will be evaluated by co-location of the iGrav-027 data with conducted on monthly basis absolute gravity determinations with the A10-020 gravimeter.
A comprehensive tidal analysis of the iGrav-027 record along with a more than a 5 year time series acquired with a LCR G1036 gravimeter was performed to obtain a reliable residual signal. Residual signal will be compared with known and available models providing time series corrections for atmospheric and hydrological loading. Residual signal will also be compared with monthly regular absolute gravity determinations with the A10-020 as well as with local hydrological models developed with the use of data from hydrological sensors operating at the Borowa Gora Observatory.
Results of the presented work will be a comprehensive basis for evaluation of long term gravity changes at the Borowa Gora Observatory and for further improvement of the quality of data submitted from the Observatory to IGETS and AGrav databases.
This work presents the results of analysis of gravity signal records with the iGrav-027 from the first year of its operation, starting from the scale factor determination and drift characteristics. Scale factor of the iGrav-027 was determined with the use of data acquired with A10-020 and FG5-230 absolute gravimeters as well as LCR relative gravimeters. The instrumental drift will be evaluated by co-location of the iGrav-027 data with conducted on monthly basis absolute gravity determinations with the A10-020 gravimeter.
A comprehensive tidal analysis of the iGrav-027 record along with a more than a 5 year time series acquired with a LCR G1036 gravimeter was performed to obtain a reliable residual signal. Residual signal will be compared with known and available models providing time series corrections for atmospheric and hydrological loading. Residual signal will also be compared with monthly regular absolute gravity determinations with the A10-020 as well as with local hydrological models developed with the use of data from hydrological sensors operating at the Borowa Gora Observatory.
Results of the presented work will be a comprehensive basis for evaluation of long term gravity changes at the Borowa Gora Observatory and for further improvement of the quality of data submitted from the Observatory to IGETS and AGrav databases.