| Description: The name of the aperture used for the observation. For HST data files, this is generally the value of FITS keyword APERTURE. Note that these values are instrument-specific; see the relevant HST Instrument Handbooks and Data Handbooks for further details. For FOC data, this attribute should be nil with nilReason = "inapplicable". |
| Namespace Id: hst | Steward: rings | Class Name: Pointing_Parameters | 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: true | Pattern: None |
| Permissible Value(s) | No Values | |