dataType JD

extends TimeInstant

Extension of TimeInstant for time expressed in Julian days. Note that JD does not properly specify a time stamp unless it is related to a time scale and reference position. Precision can easily become an issue with JD, as the numbers tend to be large.

classDiagram

        class JD{
        ivoa:real date

        }
        JD --|> TimeInstant
TimeInstant --|> TimeStamp
TimeStamp --|> Coordinate

link TimeInstant "../TimeInstant"
link TimeStamp "../TimeStamp"
link Coordinate "../Coordinate"

Members

name	type	mult	description
date	ivoa:real		The JD coordinate value. JD dates are dimensionless, with implied units in days.