[time-nuts] Sub mm measurements with gps timing antennas?

[Mark Sims]

You are not going to get anywhere near sub-mm levels without doing L1/L2 
measurements with a geodetic grade receiver and thermally stabilized antenna 
(and receiver/cable).   With a patch antenna (which is in a lot of timing 
antenas) on a geodetic L1/L2 receiver you can see 1 meter errors!               
                          
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