<div dir="ltr">Doesn't make sense to me:<div><br></div><div>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.</div>
<div>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.</div>
<div>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.</div>
<div><br></div><div>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).</div>
<div><br></div><div>--Amos</div><div><br></div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On 8 May 2014 15:20, E.S. Rosenberg <span dir="ltr"><<a href="mailto:esr+linux-il@g.jct.ac.il" target="_blank">esr+linux-il@g.jct.ac.il</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">One possible explanation may be that due to the very hard time cellphones have to get and maintain GPS locks (which is the reason we have technologies like AGPS) makes it impractical....<br>
</div><div class="gmail_extra">
<br><br><div class="gmail_quote">2014-05-08 14:43 GMT+03:00 Amos Shapira <span dir="ltr"><<a href="mailto:amos.shapira@gmail.com" target="_blank">amos.shapira@gmail.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div><div class="h5">
<div dir="ltr">I posted a question in <a href="http://android.stackexchange.com/questions/68996/using-android-gps-as-ntp-refclock" target="_blank">http://android.stackexchange.com/questions/68996/using-android-gps-as-ntp-refclock</a></div>
<div class="gmail_extra"><div><br><br><div class="gmail_quote">On 8 May 2014 10:56, geoffrey mendelson <span dir="ltr"><<a href="mailto:geoffreymendelson@gmail.com" target="_blank">geoffreymendelson@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div>On 5/8/2014 10:49 AM, Amos Shapira wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Yeah I'm with you about taking advantage of the phone's GPS signal to get a good clock, and I thought that this is what this time-server thing does. What does it do if not that?<br>
</blockquote>
<br></div>
The one I saw was just an Android port of the standard NTP server, which syncs to other NTP servers.<div><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
It's weird that nothing does it yet. Any takers?<br>
<br>
</blockquote>
<br></div>
My opinion too.<br>
<br>
I'd settle for an RS232 serial emulation over USB of the old GPSs. :-)<div><div><br>
<br>
Geoff.<br>
<br>
-- <br>
Geoffrey S. Mendelson 4X1GM/N3OWJ<br>
Jerusalem Israel.<br>
<br>
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