| Description: The shutter_subtraction_mode specifies whether shutter subtraction will be performed, or if it is dependent on the exposure_duration_threshold_count. |
| Namespace Id: img | Steward: img | Class Name: Shutter_Subtraction | 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 |
| | Always | Always indicates the subtraction is, or will be, on regardless of other conditions |
| | Conditional | the exposure_duration_threshold_count will determine whether or not shutter subtraction will be performed |
| | None | shutter subtraction was not used |
| | True | shutter subtraction will be performed |