| Description: The filter_number attribute provides the numeric identifier of an instrument filter through which an image or measurement was acquired or which is associated with a given instrument mode. |
| Namespace Id: img | Steward: img | Class Name: Optical_Filter | Type: ASCII_NonNegative_Integer |
| Minimum Value: 0 | Maximum Value: 18446744073709551615 | Minimum Characters: None | Maximum Characters: None |
| Unit of Measure Type: None | Default Unit Id: None | Attribute Concept: None | Conceptual Domain: INTEGER |
| Status: Active | Nillable: false | Pattern: [0-9]+ |
| Permissible Value(s) | No Values | |