19.7.4 DAS Raw

The DAS Raw object (DasRaw) contains the attributes of raw data acquired by the DAS measurement instrument. This includes the unit in which the raw data was measured, the indices of the loci where the raw data was acquired along the fiber optical path (start locus and number of loci), and information about times and (optional) triggers. Note that the actual raw data samples, times and trigger times arrays are not present in the XML files but only in the HDF5 files because of their size. The XML files only contain references to locate the corresponding HDF5 files, which contain the actual raw samples, times, and (optional) trigger times.

For more information on naming conventions in the HDF5, see Section 19.5.4 HDF5 Structure and Naming Conventions (Required for DAS).

The array types to store the data samples and corresponding times arrays in the HDF files are described in Section 19.8 DAS Array .