This standard presents the file format to be utilized for data acquired by a revolution-based tip timing data system. It provides the following: ? All header information needed to describe the contents of the data file ? The format of the header ? The definition and type of all variable names ? The format of the sensor(s) data blocks Purpose The purpose of this standard is to establish a file format for revolution-based tip timing data. This standard file format will allow tip timing users to share data and allow a common data file reading and writing capability across the tip timing community.