[time-nuts] need recomendation for a portable 10mhz reference oscilator
mctylr at gmail.com
Tue Dec 11 21:02:49 EST 2007
On Dec 11, 2007 6:38 PM, John Ackermann N8UR <jra at febo.com> wrote:
> > How long does a survey take (in good conditions) and what sort of time
> > constant would you want to use with a navigation box?
> It depends on the receiver, but usually it's a few hours to a full day.
> Of course, if you use external software you can use whatever time
> period you want.
Newer navigation units offer 5Hz output, combined with SBAS (WAAS in
the US/Canada) for a more accurate measurement, you should be able to
do a "modest" survey in a few minutes. I believe the accuracy
continues to improve as survey time increases, up to a few hours.
More information about the time-nuts