Name: Time_Range_ETVersion Id:
Description:Ephemeris time, as defined by the referenced field, for the first and last science data records for a temporally contiguous block of records with the same state or affected by the same conditions. These records need not be contiguous within the file, but there must be no records with a different state between the start and stop time.
Namespace Id: nucspecSteward: sbnRole: TBD_roleStatus: Active
Class Hierarchy: Time_​Range_​ET
No Associations 
Referenced from: Observing_​Condition, State_​Time