Is the problem occuring when you go under an object (like a bridge) or in a tunnel?
If so, that's because the GPS can't comu8nicate with satellites.
my GPS is kinda slow when I cross some kind of obstacle like a crossing... Anyone having the same problem?
Is there any way I could apply some sort of configuration to solve that given that I have a P4 3.0Ghz and 1GB of RAM? and I have a GPS Sirft3
best regards, Filipe Abrantes