[ntp:questions] SNTP server + ntpd 4.2.4 client

Noob root at localhost.invalid
Wed Mar 19 15:27:50 UTC 2008


Richard B. Gilbert wrote:

> With something like 27 NAVSTAR (GPS) satellites aloft, there should 
> almost always be seven or eight above the horizon.  Satellites more than 
> ten degrees above the horizon are preferred!
> 
> I've never used the GPS18LVC (I have a Motorola M12+T) but if you know 
> your exact location you only need one satellite to get the time.  There 
> are four equations in four unknowns (lattitude, longitude, elevation, 
> and time).

ITYM latitude.

> Not knowing any of these variables, you need four satellites.

The Wikipedia article was an entertaining read.
http://en.wikipedia.org/wiki/GPS#Calculating_positions




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