[time-nuts] FLL errors

[Neville Michie]

A PLL locks on to the nearest cycle,
is a Time Locked Loop different?
If the decoded time from a GPS system is used discipline 
an oscillator then leap seconds would have to have 
a frequency transient to maintain lock.
If you use the output to say drive a radio telescope monitoring 
a distant object you would want Earth’s rotation to be phase or 
sidereal Time locked. I realise that for such a task far more complex 
computation would be required.
So is a time locked loop a valid concept?

Cheers,
Neville Michie