> -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Chuck Harris > Sent: Thursday, October 30, 2008 12:09 PM > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] Time-zones and World time.. > > As I recall, Local Solar Time is also known as Apparent Solar > Time, and is defined as when the sun reaches its highest > point over some local meridian of interest (town hall?). > > That point in time is called 00:00:00... Which sort of makes > sense because you can directly observe high-noon, but > midnight can only be estimated. > > -Chuck Harris > One can, of course, observe meridian passage for a variety of stars at night, and from that determine the time (given a calendar and the appropriate almanac data), so you could directly observe midnight.
Don't forget too, that solar noon varies quite a bit (minutes) from "mean solar time" over the year. If you're navigating your ship with noon sun sights, this is pretty important. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
