You can see only some of the total number of GPs satellites, in the best cases (open space, not cities), you can have a maximum of 9 satellites alltogheter in the visible sky. The others are below the horizon.
You need 5 satellites to an accurate GPS navigation, so 12 channels have enough free channels to connect to a new visible satellite while another one is disappearing from sky.
Reader Comments (Page 1 of 1)
dreadn @ Dec 20th 2006 1:05PM
You can see only some of the total number of GPs satellites, in the best cases (open space, not cities), you can have a maximum of 9 satellites alltogheter in the visible sky. The others are below the horizon.
You need 5 satellites to an accurate GPS navigation, so 12 channels have enough free channels to connect to a new visible satellite while another one is disappearing from sky.
http://www.holysmoke.org/gps/sat.htm
http://tt01.ripe.net:10259/cgi-bin/gps64s-std.cgi?RRD_START=now-48h&RRD_END=-estart%2B2days&RRD_W=-w600&Draw=Draw