fixes incorrect J2000 time#498

amystamile-usgs wants to merge 1 commit intoDOI-USGS:mainDOI-USGS/usgscsm:mainfrom

amystamile-usgs:ephemTimeToCalendarTime-Bugamystamile-usgs/usgscsm:ephemTimeToCalendarTime-BugCopy head branch name to clipboard