AbstractIn June–July 2013,we performed a comparison of
five absolute gravimeters of different types. The gravimeters
were the FG5X-221 of the FGI, the FG5-110 and GBL-M
002 of the TsNIIGaiK, the GABL-PM of the IAE SB RAS, and
the GABL-M of the NIIMorGeofizika (Murmansk, Russia).
The three last-mentioned are field-type portable gravimeters
made by the Institute of Automation and Electrometry
in Novosibirsk, and this is the first international comparison
for them. This Russian-Finnish Comparison of Absolute
Gravimeters RFCAG2013 was conducted at four sites
with different characteristics: at the field sites Pulkovo and
Svetloe near St. Petersburg, and at the laboratory sites
TsNIIGaIK in Moscow and Zvenigorod near Moscow. At
the TsNIIGAiK site and at Zvenigorod two piers were used,
such that altogether six stations were occupied. The FG5X-
221 provides the link to the CCM.G-K2 Key Comparison in
Luxembourg in November 2013. Recently, the Consultative
Committee for Mass and Related Quantities and the International
Association of Geodesy drafted a strategy on how
to best transmit the results of Key Comparisons of absolute
gravimeters to benefit the geodetic and geophysical
gravimetric community. Our treatment of the RFCAG2013
presents one of the first practical applications of the ideas
of the strategy document, andwe discuss the resulting uncertainty
structure. Regarding the comparison results, we
find the gravimeters show consistent offsets at the quite
different sites. All except one gravimeter are in equivalence.
Calculation of a Health Index of Oil-Paper Transformers Insulation with Binary Logistic Regression
