time_constant_type in Occultation_​Ring_​Profile

Name: time_constant_typeVersion Id:
Description: time_constant_type distinguishes between three types of instrumental time constant assumed in a square-well model. This attribute is required if the time_constant attribute is present.
Namespace Id: ringsSteward: ringsClass Name: Occultation_​Ring_​ProfileType: ASCII_​Short_​String_​Collapsed
Minimum Value: NoneMaximum Value: NoneMinimum Characters: 1Maximum Characters: 255
Unit of Measure Type: NoneDefault Unit Id: NoneAttribute Concept: NoneConceptual Domain: SHORT_STRING
Status: ActiveNillable: falsePattern: None
Permissible Value(s)ValueValue Meaning
 Double Poledouble pole filter.
 NoneNo instrumental time constant, in which case time_constant and sigma_time_constant are both zero.
 Single PoleA single pole filter with impulse response given by h(t) = (t/t_c^2)exp(-t/t_c) for t greater than 0, 0 for t less than 0, where t_c is the time constant. See Eq. 9 Elliot et al. (1984) Astron. J. 1587-1603.