| Description: The spectrum_format attribute is required to define the specific dimensionality of the structure or substructure that contains the intensity values. |
| Namespace Id: sp | Steward: sbn | Class Name: Spectral_Characteristics | Type: ASCII_Short_String_Collapsed |
| Minimum Value: None | Maximum Value: None | Minimum Characters: 1 | Maximum Characters: 255 |
| Unit of Measure Type: None | Default Unit Id: None | Attribute Concept: None | Conceptual Domain: SHORT_STRING |
| Status: Active | Nillable: false | Pattern: None |
| Permissible Value(s) | Value | Value Meaning |
| | 1D | Linear spectrum - The spectrum is presented either as a table, in which each row contains the information for one bin (one point) of the sprectrum, which might include fields for bin parameters (and errors and related information) as well as the spectral measurement; or as a 1D array, in which each element contains one spectral point measurement. |
| | 2D | The spectrum is presented as a 2D array - an image. |
| | 3D | The spectra are presented as a 3D array, each plane containing a 2D spectrum. |
| | Tabulated-Flat | The spectra are presented as a table in which each row contains a single spectrum, and the individual spectral points and related parameters are each defined by separated Field definitions - that is, no Group_Field classes are used in defining the spectral data format. In this case, all Fields containing spectral data or bin parameters must have field_number attributes. |
| | Tabulated-Parameter Groups | The spectra are presented as a table in which each row contains a single spectrum, and Group_Field classes are used to define the fields corresponding to the spectral values, bin centers, and bin widths (if present). Each Group_Field must contain only a single parameter - in other words, the spectral values a stored contiguously within the record, the bin centers are stored contiguously within the record, etc. In this case, the Group_Field classes containing the spectral values, bin centers, and bin widths (when present) must contain only a single Field that is repeated. |
| | Tabulated-Point Group | The spectra are presented as a table in which each row contains a single spectrum, and a single Group_Field class is used to define the value and all related parameters at a single spectral point. In this case, the same Group_Field class must contain the spectral value, bin center, and bin width (when present) for each point in the spectrum. |