John,
My experience with SA some years ago was that the timing accuracy was in
the order of LORAN C, that is, about one microsecond. However, the
oscillator in my Austron 2201 GPS receiver was disciplined in frequency
by LORAN C, with result the timing accuracy was in the order of 50 ns. I
calibrated it with a Cesium oscillator. In other words, even if SA were
turned back on, it is easily defeated.
Dave
John Hasler wrote:
Chris H writes:
With Selective Availability enabled would that cause time accuracy
issues with the signals from the satellite?
I believe that it would inject a maximum of about 300 ns of random
error. However, SA is obsolete. The newest satellites don't even
implement it.
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