[time-nuts] Choke Rings and Points North

Jim Lux jimlux at earthlink.net
Tue Dec 16 08:08:18 EST 2014

On 12/15/14, 8:10 PM, Tom Van Baak wrote:

> But to prove us wrong, put the antenna on a 17 hour turn-table, collect data for 6 months, and then see if you see any 17h peaks in the FFT!
Clever idea, but..

Most rotary joints have more phase and amplitude variability than the 

So you're stuck with rotating back and forth with a cable that's flexing 
and now you get to measure the phase variability of the coax.

You really need to have your entire GPS system antenna and receiver on 
the rotating table (which will need to have temperature controls, etc.)

Oh, what a pit one can descend into with the goal of reducing everything 
to a minimum error.

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