Thanks for more useful information, Ken.
But you needn't worry about us in the UK: we get all our time from Big Ben,
which is always on time.
:-)
Chris
On 15 Aug 14, at 16:37, Ken Norton <ken@xxxxxxxxxxx> wrote:
> Like seriously! Take a frequency band meant for Space-to-ground
> transmission, immediately next to the GPS band (where the signal
> strength is somewhere just above the universe's noise floor) and
> instead repurpose it to ground-to-ground transmittions with high power
> transmitters. It wasn't just cheap, inexpensive unfiltered GPS units
> that suffered. During the tests, it was wiping out everything and the
> GPS BITS clock receivers were getting completely toasted. But that
> didn't influence the regulators. It took the threat of airplanes
> falling out of the sky before anybody would listen. We faced
> opposition that was mind-boggling.
>
> In almost every case, the NTP sites you are getting your clock updates
> from are primary timed from a GPS timed BITS Clock system.
--
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