In message <1230738511.495b944f91...@webmail.unb.ca>, "Richard B. Langley" writes: >Quoting Poul-Henning Kamp <p...@phk.freebsd.dk>: > >> And since WGS84 is not rigidly linked to ITRS, doesn't that mean >> that in order to use DUT1 broadcasts to point a telescope (precisely[1]) >> you also need to the ITRS/WGS84 difference at your place ? >> >> Has anybody calculated what the worst case DUT1 difference is in >> the WGS84 datum ? > >The current version of WGS84 differs from the current version of ITRF by only >a few >centimetres. WGS84 was purposely updated to agree as closely as possibly with >ITRF.
But it is not guaranteed to keep close, is it ? -- 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 http://six.pairlist.net/mailman/listinfo/leapsecs
