On Sun, October 21, 2007 14:00, Jan Hoevers said: > Yes, I guess so. At 29.9N the majority of the sats is still in the > southern sky of course. The further you are from the equator, the more > critical it gets.
Many satellites is a good thing. But that is not the only metric. You also want them spread over the sky to get good geometry. The receiver will tell you the geometry in the various DOP factors shown in some messages. Low elevation satellites are subject to more errors than those high up on the sky. Not seldom you will tell the receiver to disregard satellites below five to fifteen degrees of elevation. Multipath can add errors up to hundreds of meters on individual satellites which will affect your receiver solution. Multipath is mitigated by careful antenna siting and a good antenna. However for driving a NTP-server -- with the modest timing accuracy required -- availably is probably the most important factor to consider. -- Björn _______________________________________________ timekeepers mailing list [email protected] https://fortytwo.ch/mailman/cgi-bin/listinfo/timekeepers
