[time-nuts] Speaking of Costas loops

[Jim Lux]

On 7/5/13 8:44 AM, Bob Stewart wrote:
> Wouldn't a Cs or Rb clock in orbit be slow due to relativistic effects?  I'm pretty sure there is a relativistic correction to the GPS clocks.
>
> Bob - AE6RV
>
>

I believe that the original WAAS repurposed transponders intended for 
other L-band satellite signals (e.g. Sirius/XM/LightSquared).

As noted earlier in the discussion, the new satellites might have a 
specialized payload, which could have a purpose specific coherent 
transponder, rather than a linear translator.

If it is purpose specific and single channel, then making it immune to 
the local oscillator is straightforward.