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coordsys.epoch - Function

	Package	general
	Module	images
	Tool	coordsys

Return the epoch

Synopsis
epoch()

Returns
Epoch measure or fail

Description

This function (short-hand name e) returns the epoch of the observation as a Measure. You can format it with quanta

Example

- cs := coordsys()
- ep := cs.epoch()
- ep
[type=epoch, refer=UTC, m0=[value=51728.4578, unit=d]] 
-
- time := dm.getvalue(ep)           # Extract time with measures
- dq.time(time)                     # Format with quanta
10:59:10.170