On Thu 2006-12-14T08:45:12 -0500, Daniel R. Tobias hath writ:
> Actually, GPS arises from our obsession with
> knowing what *place* we're at; its need for precise time is a mere
> technical detail of its implementation.
I am often amused by online complaints that someone's handheld GPS
has the time wrong by two seconds. I surmise that with such units
it is also the case that the position it gives is correct for
where it was two seconds ago.
One thing that is clear from Levine's article is that you get what you
pay for, and that if you really want it done well you have to pay lots.
What I don't understand is why this does not generalize to leap seconds.
--
Steve Allen <sla_at_ucolick.org> WGS-84 (GPS)
UCO/Lick Observatory Natural Sciences II, Room 165 Lat +36.99858
University of California Voice: +1 831 459 3046 Lng -122.06014
Santa Cruz, CA 95064 http://www.ucolick.org/~sla/ Hgt +250 m
Received on Thu Dec 14 2006 - 07:49:36 PST