[time-nuts] Setting loop TC using thunderbolt internal data.

[Magnus Danielson]

Bruce Griffiths skrev:
> Hej Magnus
> 
> Magnus Danielson wrote:
>> Tom,
>>
>> Tom Van Baak skrev:
>>   
>>> Ah, OK. So you keep the antenna connected and you keep the
>>> GPS receiver in position hold mode, still receiving fixes.
>>>
>>> All you're doing is disabling the software disciplining algorithm.
>>> That sounds like a good test. Let me try this too and see if I
>>> agree with your conclusions.
>>>     
>> We discussed this a little while back. I proposed a three-cornered hat 
>> using two receivers and one counter... as the Thunderbolts has a builtin 
>> TIC to GPS which can be logged. We also discussed just running a single 
>> Thunderbolt in holdover. Others had already tried that approach. Bruce 
>> and I discussed to some degree the effect of steering on the result.
>>
>>   
> 
> The 3 cornered hat technique only works well (even in the extended form
> allowing finite correlations between the 3 sources) when the ADEV of the
> sources being compared aren't too disparate.
> Consequently this comparison will only work well for tau values in the
> vicinity of the Allan intercepts which in turn will need to be not too
> disparate.

You already said this. I was only refering back so Tom would get the 
context.

Cheers,
Magnus