NTP

[geoffrey mendelson]

On 5/8/2014 3:39 PM, Amos Shapira wrote:
> Doesn't make sense to me:
>
> 1. The NTP server only needs the time signal, not the location (which 
> requires 4 satellites to be accurate), so even a signal from a single 
> satellite should be sufficient.
> 2. "getting a signal lock" is mostly a matter of having an up to date 
> satellite position almanac and recent location (within hundreds of 
> kilometers) in order to find the 4 required satellites. Finding the 
> first satellite is usually very quick.
> 3. Once the phone knows where it is, it's capable of keeping track of 
> a car moving at over 100 km/h for hours in order to update Google Maps 
> and friends. So the "keeping up" part is a solved problem, even if it 
> was an issue for the context of this thread.
>
> Besides - the information should be there (the accurate time is a 
> crucial part of the positioning process). The main question from where 
> I stand now is how does Android provide access to the information 
> (which API and was it added to the multitude of reference clocks that 
> the standard NTP software comes with).
>

Don't forget that most of the people using this (if not all), just want 
to timesync a LAN, and can stick said cellphone up against a window and 
leave it there.


Geoff.

-- 
Geoffrey S. Mendelson 4X1GM/N3OWJ
Jerusalem Israel.