[time-nuts] Re: GPS antenna question

[Andrew Rodland]

On Thursday, July 22, 2021 9:05:47 PM EDT Robert DiRosario wrote:
> If I want to use GPS for time and frequency standards, just how solidly
> does the antenna need to be mounted?
> The easiest and least expensive way to mount a GPS antenna would be up
> on two 10' TV mast sections, but that
> would move around a bit in the wind.  Maybe two or three inches.  Or do
> I need to do better?  All of the "easy" or
> "good" spots in my yard already have amateur radio antennas.

Well, applying the rule of thumb, 1 foot = 1 nanosecond at the speed of light, 
which would make you think that two or three inches of wiggle (250ps) would be 
down below most of your other noise sources.

Andrew KC2G