Fig. 1: (Colour on-line) Result of the comparison of the
CODATA set of G measurements with a fitted sine wave (solid
curve) and the 5.9 year oscillation in LOD daily measurements
(dashed curve), scaled in amplitude to match the fitted G sine
wave. The acronyms for the measurements follow the convention
used by CODATA, with the inclusion of a relatively new
BIPM result from Quinn et al. [11] and another measurement
LENS-14 from the MAGIA Collaboration [13] that uses a new
technique of laser-cooled atoms and quantum interferometry,
rather than the macroscopic masses of all the other experiments.
The green filled circle represents the weighted mean of
the included measurements, along with its one-sigma error bar,
determined by minimizing the L1 norm for all 13 points and
taking into account the periodic variation.
rate effectively providing a means to examine geophysical
and atmospheric processes [8].
For the following discussion, we emphasize that our G
analysis and LOD analysis (a verification of the procedures
employed in [6]) are very much independent of one
another with the determined fitting parameters for both
the period and phase of the periodicities in these measurements
coinciding in near perfect agreement. Although we
recognize that the one-to-one correlation between the fit to
the G measurements and the LOD periodicity of 5.9 years
could be fortuitous, we think this is unlikely, given the
striking agreement shown in fig. 1. Furthermore, after
taking into account this fitted oscillatory trend in the G
measurements, we obtain agreement amongst the different
experiments mentioned in [5] with a weighted mean value
for G of (6.673899± 0.000069)× 10−11m3 kg−1 s−2.