My point is that there has been a lot of discussion about locking to
GPS, or Loran, or some other standard, and it has failed to attract
any practical interest because it is more complex than most amateurs
would like.

An improvement could be made by simply making sure that the computers
at both ends are within a few seconds of each other (for QRSS 60 or
120), and ensuring that the FFT software knows roughly when the dot
period starts.

This is pretty much the point of GPS-BPSK, which only requires time synchronization with the 1pps marker to achieve performance improvement.  That's not at all complex, but thus far has not seen wide use.  It would be nice to see it applied to QRSS, but will the "complexity" of inputting a 1pps marker to a computer be too great for would-be TA explorers?  :)

 

John