Initial analysis the iGrav-027 superconducting gravimeter records at Borowa Gora Geodetic-Geophysical Observatory
21/09/2016 | 16:30 | Session 4: Global gravity field modelling
Author(s): Przemyslaw Dykowski, Jan Krynski and Marcin Sekowski
Przemyslaw Dykowski, Jan Krynski and Marcin Sekowski
In May 2016 the iGrav-027 superconducting gravimeter became operational at the Borowa Gora Geodetic-Geophysical Observatory. Since then a continuous gravity signal is collected with 1 second sampling rate. Besides the iGrav gravimeter a LaCoste&Romberg (LCR) model G gravimeter is recording a gravity signal in the Observatory; also regular monthly absolute gravity determinations are performed with the A10-020 absolute gravimeter.
The initial analysis of the iGrav gravimeter records includes scale factor determination for the iGrav-027 with the use of AG (A10 and FG5) and LCR spring gravimeter. The initial drift rate of the iGrav-027 gravimeter will be evaluated together with monthly determination of gravity from the measurements with the A10-020 gravimeter. The Earth tide signals from the iGrav and LCR gravimeters will be analyzed and compared.
To support the analysis of the gravity variations determined with the iGrav gravimeter a variety of hydrological parameters are recorded at Borowa Gora Observatory together with gravimetric records. The residual gravity from the iGrav027 gravimeter will be compared with the records of precipitation, soil moisture and water table level at Borowa Gora Geodetic-Geophysical Observatory.
The usefulness of the iGrav gravimeter to verify the stability of the A10-020 measurements will be discussed.