[time-nuts] Three-cornered hat on timelab?

[Hal Murray]

magnus at rubidium.dyndns.org said:
> You can fair better if you have a double-frequency GPS setup, as it can
> first-degree measure and compensate the ionospheric shifts, which allows
> for a benefit over L1 CA only receiver. 

Are any dual-frequency receivers available at hobbyist prices?

What is the status of open-source SDR for GPS?  Is this a good excuse to jump 
on that bandwagon?


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