synchronization gauge

[bernhard.rothenstein]

Please give me a defnition of the concept "synchronization gauge" I find in papers.

[DrGreg]

Please give me a defnition of the concept "synchronization gauge" I find in papers.Rizzi et al, Synchronization Gauges and the Principles of Special Relativity (http://arxiv.org/abs/gr-qc/0409105) give this definition:

"A synchronization gauge is a (very particular) group of transformations, internal to the theory, which leave the observables unchanged (”saving the phenomena”)" (page 2, footnote 3).

Thus I interpret this to correspond to a whole family of coordinate systems available for a single observer to choose from, all agreeing the same "measurements" e.g. for observer's proper time. Examples are:

- the \epsilon-parameterised family of Reichenbach transformations
- the \epsilon-parameterised family of Mansouri-Sexl transformations
- the \epsilon-parameterised family of generalised Selleri transformations

(all for a fixed value of V for a given pair of observers).