[LEAPSECS] LOD and gravity connected ?
http://iopscience.iop.org/0295-5075/110/1/10002/article -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ LEAPSECS mailing list LEAPSECS@leapsecond.com https://pairlist6.pair.net/mailman/listinfo/leapsecs
Re: [LEAPSECS] LOD and gravity connected ?
On Apr 29, 2015, at 3:32 AM, Poul-Henning Kamp p...@phk.freebsd.dk wrote: http://iopscience.iop.org/0295-5075/110/1/10002/article The files extend from 1962 January 1, when the Consultative Committee on International Radio (CCIR) established Universal Time Coordinated (UTC) as the standard for time keeping, to the most current date available. I notice that this is one of the few un-footnoted facts presented in this paper. Otherwise a very interesting paper to read. I wonder if this correlation will persist in the coming years? I also wonder how predictive the LOD curve fit will be over the next decade or two? Warner signature.asc Description: Message signed with OpenPGP using GPGMail ___ LEAPSECS mailing list LEAPSECS@leapsecond.com https://pairlist6.pair.net/mailman/listinfo/leapsecs
Re: [LEAPSECS] LOD and gravity connected ?
On Wed 2015-04-29T09:28:45 -0600, Warner Losh hath writ: http://iopscience.iop.org/0295-5075/110/1/10002/article The files extend from 1962 January 1, when the Consultative Committee on International Radio (CCIR) established Universal Time Coordinated (UTC) as the standard for time keeping, to the most current date available. I notice that this is one of the few un-footnoted facts presented in this paper. That's a bit imprecise about exactly what happened as of 1962. It wasn't because of UTC, a term which did not exist for 3 more years. The boundary of 1962 on the IERS data exists because 1962-01-01 was agreed as the date that 1) BIH changed from reducing the input observations with FK3 to FK4 in accord with Resolution 59 from the 10th IAU GA. 2) BIH assumed responsibility for the coordination of UT in keeping with resolutions from URSI in 1960 September and IAU Comm 31 in 1961 August 3) IAU Comm 31 directed BIH to determine new, globally self-consistent values for the longitudes of the observing stations to replace the longstanding conventional longitudes that had been in use The BIH was woefully underfunded and I suspect that they could not consider re-reducing the older observations to the newer system. Everyone just had to hope that any shifts/discontinuities due to the change of techniques and models were inconsequentially small. -- Steve Allen s...@ucolick.org WGS-84 (GPS) UCO/Lick Observatory--ISB Natural Sciences II, Room 165 Lat +36.99855 1156 High StreetVoice: +1 831 459 3046 Lng -122.06015 Santa Cruz, CA 95064http://www.ucolick.org/~sla/Hgt +250 m ___ LEAPSECS mailing list LEAPSECS@leapsecond.com https://pairlist6.pair.net/mailman/listinfo/leapsecs
Re: [LEAPSECS] LOD and gravity connected ?
Thanks for the link. I see the PDF is free this time. /tvb - Original Message - From: Poul-Henning Kamp p...@phk.freebsd.dk To: Leap Second Discussion List leapsecs@leapsecond.com Sent: Wednesday, April 29, 2015 2:32 AM Subject: [LEAPSECS] LOD and gravity connected ? http://iopscience.iop.org/0295-5075/110/1/10002/article -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ LEAPSECS mailing list LEAPSECS@leapsecond.com https://pairlist6.pair.net/mailman/listinfo/leapsecs ___ LEAPSECS mailing list LEAPSECS@leapsecond.com https://pairlist6.pair.net/mailman/listinfo/leapsecs
