[time-nuts] 1 pps Accuracy in two locations

[martyn at ptsyst.com]

Hello,

 

I'm always being asked to provide equipment that can produce two 1 pps
outputs aligned to each other to within a few ps.

 

These two 1 pps pulses are not in the same location and could be 100 metres
to a few km away.

 

So they are asking for two of my GNSS frequency standards with 1 pps
outputs.

 

The 1 pps outputs being derived from the rubidium oscillator (which is
aligned to GPS/GNSS)

 

The best I think I can achieve is in the low ns range.

 

Does anyone know how this can be achieved?

 

Regards

 

Martyn