Measurements in rotating systems

This paper considers a method of making measurements within a particular metric framework for a rotating system. The relationship between measurements made by observers at different points within a rotating system has been investigated. The first part of the paper considers the application of radar measurement to the rotating system. In the second part infinitesimal radar measurements are used to show that for an observer at a radius R within a rotating system, similar results are obtained, through the application of the metric, to those which would be obtained by the use of instantaneous rest frames. The overall aim of this paper is to clarify the interpretation of measurements made by a rotating observer when the metric approach to rotating systems is used. (author)