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  VizieR META catalogue
Describes the Catalogues and Tables accessible via VizieR (also called ReferenceDirectory)
Post annotation
1.METAtimeSystemGeneral Time System table; PK=timesystid

Query by Constraints constraints help applied on Columns (Output Order: + - )
ShowSortColumn  Constraint Explain   (UCD)
  time_syst_id  System identification (PK)
  time_scale_id  Time scale identification FK(METAtimeScaleRef)
  time_frame_id  Time Frame position identification FK(METAtimeFrameRef)
  time_systematic_err  If time scale and/or reference position is missed, you can provide them as UNKNOWN and set the systematic error/uncertainty to 1000 s. If only the time scale is unknown set this to 100s
  name (char) System name
  description (char) Description

ALL cols
 (i)indexed column
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usage  Display UCD1+    UCD1  
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