Absolute Gravity Measurements and Calibration of SG-CT031 at Canberra, 1999-2000
2001 年 47 巻 1 号 p. 410-416
詳細
2001 年 47 巻 1 号 p. 410-416
The Mount Stromlo site (Canberra, Australia) was visited by the absolute gravime ter FG5 #206 (INSU, France) in March 1999 and again in March 2000 for absolute gravity measurements. Each of these campaigns led to a value of the mean gravity which we compare with values previously obtained in September 1998 by FG5 #110 (CSIRO, Australia) and February 1996 by FG5 #201(GSI, Japan) at the same point. The four data sets have all been reprocessed according to the same scheme (using the same classical corrections) for comparison. In addition, an analysis of the influence of different models is performed. In this framework we investigate different tidal (solid tide and ocean loading) models in order to determine their influence on the mean gravity estimate as well as the standard deviation of the residuals. The superconducting gravimeter CT031 (NAO, Japan), located at the Mount Stromlo site since January 1997, is calibrated by comparison with these AG recordings. Again, the two FG5 #206 data sets and the FG5 #110 data set are processed identically, and the calibration factors are compared.
