Reply to ‘Comment on Relativistic theory of the falling cube gravimeter’

@article{Ashby2018ReplyT,
  title={Reply to ‘Comment on Relativistic theory of the falling cube gravimeter’},
  author={Neil Ashby},
  journal={Metrologia},
  year={2018},
  volume={55},
  pages={316-317}
}
  • N. Ashby
  • Published 14 March 2018
  • Physics
  • Metrologia
In the subject paper [1] of the comment [2], light propagation through an absolute gravimeter was analyzed, including the propagation delay through the falling retroreflector and through the vacuum. The resulting expression for the interference signal applies without any subsequent "speed-of-light" correction. Other corrections appeared for the three fitting parameters $Z_0,\ V_0$ and $g$, which are the initial position and velocity, and the acceleration of gravity at the reference point. The… 
Comparison of Open and Solid Falling Retroreflector Gravimeters
We study whether the optical properties of a solid glass retroreflector influence the value of the acceleration of gravity $g$ determined by dropping both solid and open retroreflectors in an
On the effect of the light propagation within the corner-cube reflector of absolute gravimeters
We have assessed the implications of the in-cube light propagation effect in absolute gravimeters, and found it contradictory to existing theoretical and experimental data. We maintain that the

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Reply to ‘No correction for the light propagation within the cube: Comment on Relativistic theory of the falling cube gravimeter’
The comment (Nagornyi 2018 Metrologia) claims that, notwithstanding the conclusions stated in the paper Relativistic theory of the falling cube gravimeter (Ashby 2008 Metrologia 55 1–10), there is no
Comment on ‘Relativistic theory of the falling retroreflector gravimeter’
In the paper by Ashby (2018 Metrologia 55 1?10) the correction due to the time delay of light propagated through the prism retroreflector of absolute gravimeters is discussed. Accordingly, the
Relativistic theory of the falling retroreflector gravimeter
We develop a relativistic treatment of interference between light reflected from a falling cube retroreflector in the vertical arm of an interferometer, and light in a reference beam in the
No correction for the light propagation within the cube: comment on ‘Relativistic theory of the falling retroreflector gravimeter’
Although the equation of motion developed in the paper (Ashby 2018 Metrologia 55 1) depends on the parameters of the falling cube, such as depth and refraction index, the parameters are only
A new generation of absolute gravimeters
TLDR
The design improvements incorporated in a new generation of absolute gravimeters, the FG5, have led to an instrumental uncertainty estimate of 1,1 × 10-8 m s-2 (1,0 μGal).
Correction due to the finite speed of light in absolute gravimeters Correction due to the finite spe
The correction due to the finite speed of light is among the most inconsistent in absolute gravimetry. Formulae reported by different authors yield corrections scattered up to 8 µGal for no obvious
Correction due to the finite speed of light in absolute gravimeters Metrologia
  • Metrologia
  • 2011
Introduction to Electrodynamics 2nd edn (Englewood Cliffs, NJ: Prentice-Hall
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