[time-nuts] statistical distribution of initial frequency error in tcxos

[Bob kb8tq]

Hi

If you have something in the 100’s of these “up there” with things like doppler / temperature /
radiation / and aging all involved ….. how different do they need to be in order for the initial 
delta frequency to be useful / good enough ? 

I can see a pretty good argument that something past the “couple of ppm” might be needed. 
On a hundred devices that comes out to a pretty big spread.

Bob

> On Mar 13, 2019, at 7:03 PM, jimlux <jimlux at earthlink.net> wrote:
> 
> On 3/13/19 2:28 PM, wb6bnq wrote:
>> Hi Jim,
>> If you have a mother-ship and presuming that it is going to be within "RF" range of all little ones, how about sending a "PILOT" tone that comes from the mother-ship to phase lock all the little ones internal oscillators ???
> 
> That's basically the idea. But you need multiple source locations at multiple frequencies to solve for position, velocity, and local clock offset.
> 
> The process is very much like GPS (or Transit) but, of course, there is no GPS in deep space.
> 
> 
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