| Description: Optical filter used for the image. This attribute corresponds to the keyword FILTER_NAME in earlier versions of Voyager data products. For details see the documentation at https://pds-rings.seti.org/voyager/iss/inst_cat_na1.html and https://pds-rings.seti.org/voyager/iss/inst_cat_wa1.html |
| Namespace Id: vgr | Steward: rings | Class Name: ISS | 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 |
| | Blue | NAC Filter #2 or WAC Filter #1, spanning portions of the Visible spectrum from 0.43 to 0.53 microns |
| | CH4/JS | WAC Filter #0, spanning portions of the Visible spectrum from 0.614 to 0.624 microns. Also called CH4_JS or METHANE-JST. |
| | CH4/U | WAC Filter #6, spanning portions of the Visible spectrum from 0.536 to 0.546 microns. Also called CH4_U or METHANE-U. |
| | Clear | NAC Filter #0 or #4 or WAC Filter #2, spanning portions of the Visible and Ultraviolet spectrum from 0.28 to 0.64 microns |
| | Green | NAC Filter #5 or #6 or WAC Filter #5, spanning portions of the Visible spectrum from 0.53 to 0.64 microns |
| | Orange | NAC Filter #3 or WAC Filter #7, spanning portions of the Visible spectrum from 0.59 to 0.64 microns |
| | Sodium | WAC Filter #0, spanning portions of the Visible spectrum from 0.588 to 0.590 microns. Also called NAD or SODIUM-D. |
| | UV | NAC Filter #7, spanning portions of the Ultraviolet spectrum from 0.28 to 0.37 microns |
| | Violet | NAC Filter #1 or WAC Filter #3, spanning portions of the Visible and Ultraviolet spectrum from 0.35 to 0.45 microns |