The rotation is not constant, and is "too slow." It takes (a very little) more than 24 hours for the earth to make one rotation.
What have I started!?! All I wanted to know was whether LISTCAT or the like supported dataset age granularity finer than one day! Charles -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Tom Marchant Sent: Friday, June 07, 2013 2:33 PM To: [email protected] Subject: Re: Age of datasets in hours, not days? On Fri, 7 Jun 2013 14:58:01 -0400, John Gilmore wrote: >Precession very gradually brings UTC (and other lunisolar calendars >too) out of alignment with the seasons on earth. Leap seconds correct >for this precession, keeping UTC seasonally aligned, or nearly so. That's the purpose of leap years. Leap seconds do not have anything to do with seasons, but with variations in the mean solar day. As I understand it, the problem that leap seconds address is that the speed of rotation of the earth is not constant. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
