[ntp:questions] Questions about joining pool.ntp.org

Uwe Klein uwe at klein-habertwedt.de
Wed Aug 31 07:03:43 UTC 2011

Greg Hennessy wrote:
> On 2011-08-28, David J Taylor <david-taylor at blueyonder.co.uk.invalid> wrote:
>>Don't forget the sideband 
>>energy from these digital transmissions, and the below zero 
>>signal-to-noise ratio of GPS.
> I really doubt the signal to noise ratio of GPS is below zero.
> Below unity I would believe.
It is well below 0dB.

ahh, here:

around -22dB

you get a "win" by correlation with the CA PR pattern (~1000 bits).
( you need better than +6dB S/N afair)


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