[time-nuts] Best Chance GPS module
jimlux at earthlink.net
Thu Dec 1 23:34:35 EST 2016
On 12/1/16 7:06 PM, Bob Camp wrote:
>> 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.
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