29.1.16 DasSpectraData

Topic Version1Published12/09/2016
For StandardPRODML v2.0
Type:ClassStereotype:«XSDcomplexType»

Three-dimensional array (loci, time, transform) containing spectrum data samples. Spectrum data is processed data obtained by applying a mathematical transformation function to the DAS raw data acquired by the acquisition system. The array is 3D and contains TransformSize points for each locus and time for which the data is provided. For example, many service providers will provide Fourier transformed versions of the raw data to customers, but other transformation functions are also allowed.

Table 29.1.16-1 Attributes

Name

Type

Notes

Dimensions

DasDimensions

An array of three elements describing the ordering of the raw data array. The fastest running index is stored in the last element. For example {‘time’, ‘locus’, ‘frequency’} indicates that the frequency is the fastest running index. Note that vendors may deliver data with different orderings.

EndFrequency

FrequencyMeasure

End frequency in a DAS spectra data set. This value is typically set to the maximum frequency present in the spectra data set.

StartFrequency

FrequencyMeasure

Start frequency in a DAS spectra data set. This value typically is set to the minimum frequency present in the spectra data set.

Table 29.1.16-2 Associations

Association

Notes

From: DasSpectraData.SpectraDataArray

1To: AbstractNumericArray

Association