| Description: The flat_field_correction_flag indicates whether flat field correction was applied to normalize pixel-to-pixel sensitivity variations across the detector. When ENABLED, the correction involves: - Division by a normalized flat field derived from a slope file specific to the filter combination and optics temperature range - Correction for dust rings and mottling effects that appear in images Selection of the appropriate slope file from the 'slope_db_2.tab' database is based on: - Camera (NAC/WAC) - Filter combination - Optics temperature range (-5°C and below, -5°C to 25°C, or above 25°C) The correction is skipped if the shutter is disabled or if no appropriate flat field file is found in the database. The flat field is normalized to the median value of a 400x400 pixel region in the center of the image. |
| Namespace Id: cassini | Steward: atm | Class Name: ISS_Calibrated_Attributes | 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 |
| | DISABLED | Flat field correction was disabled. |
| | ENABLED | Flat field correction was enabled. |