I try not to highlight preprints on ArXiv until they are published (the exception being if it was a proceeding or a speech, or it is by someone prominent), but this is way too interesting to sit on.
I'm guessing that this is a manuscript for publication. The authors have done a thorough compilation of experiments that test the isotropy of the speed of light, one of the foundational postulates of Special Relativity. It is always nice and convenient to have not only the data, but also to have all the references in one convenient location or document. And this is one such document. One can usually see an improvement in the accuracy of measurement that is commensurate with a lower upper limit in the violation of SR postulate. The exception here being the one-way measurement of the speed of light. Rather interesting.