[LEAPSECS] Schedule for success
phk at phk.freebsd.dk
Wed Dec 31 11:09:13 EST 2008
In message <1230738511.495b944f91ce3 at webmail.unb.ca>, "Richard B. Langley" writes:
>Quoting Poul-Henning Kamp <phk at 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)
>> 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
phk at 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.
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