| Description: occultation_direction indicates the direction of an occultation track. This refers to the observed occultation track overall, not to the subset that might appear in a particular file (e.g., if an occultation includes both ingress and egress tracks, the value for occultation_direction will be both in the data products for each occultation profile. Permitted values are 'ingress', 'egress', 'both', and 'multiple'. The value 'multiple' is used where the occultation track is not monotonic over relatively short time scales. Generally only used for some Hubble-based occultations. May be appropriate for extremely long duration occultations of a high proper motion star (e.g., u36). Required in labels of ring occultation observations. Not intended as a value for a table field. |
| Namespace Id: rings | Steward: rings | Class Name: Occultation_Supplement | 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 |
| | Both | The distance to the target body center along a portion of the occultation track decreases with time, and along a different portion increases with time. |
| | Egress | The distance to the target body center increases with time. |
| | Ingress | The distance to the target body center decreases with time. |
| | multiple | The occultation track is not monotonic over relatively short time scales. Generally only used for some Hubble-based occultations. May be appropriate for extremely long duration occultations of a high proper motion star (e.g., u36). |