[hpsdr] coherent dual mercury receivers

[Joe Martin K5SO]

To be fair to the Garmin engineer whose statement I referenced, my  
inquiry to him (several years ago now, actually) was in regard to a  
very specific Garmin GPS receiver module, their GPS-25.

After examining some of the documents available on the web regarding  
more sophisticated GPS receivers I see that it is indeed possible to  
obtain higher 1PPS accuracy than 1 uSec with some receivers but that  
the accuracy greatly depends upon the particular GPS receiver that is  
being used.  If the designers paid particular attention to deriving a  
highly accurate 1PPS signal then you're home free;  otherwise, let the  
user beware!

Thanks for the comments!  I learned something as a result.

73,  Joe K5SO

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