[time-nuts] Best Chance GPS module

[jimlux]

On 12/1/16 7:06 PM, Bob Camp wrote:
> Hi
>
>>
>> The people doing those site surveys are likely running precision
>> oscillators and worried about errors less than one part in 10 to the 10th
>
> Based on tearing apart a number of survey grade GPS boxes …. not so much. The
> oscillator is hardly in the “super duper" category. The improvement in precision comes
> from dual (or triple band) operation and post processing.
>


This is very true.  If you have good fixes, you can generate very high 
quality 1pps pulses with a fairly ordinary oscillator.  After all, the 
reason you need *four* satellites is to estimate the local clock offset.