[time-nuts] Timing or Navigation GPS Receivers (was: Turning off PPS when not enough satellites)

[Brooke Clarke]

Hi Ulrich:

I'm not the one that can explain it in math.  But as you know by using 
carrier phase surveyor's can get much much better position accuracy than 
they can using just the code phase, so it stands to reason that better 
time transfer can be had by using carrier phase.  Also if you consider 
that you need to know  your position in order to get the time, knowing 
you position more accurately leads to a better time solution.

I think the method is still in development and Doug Hogarth is helping.  
Don't know about the cost of the Z-12.  Key features of the Z-12 are 
that uses a patented algorithm to get carrier phase that has a better 
s/n than just squaring and also that it has provision for an external 
oscillator input.

Have Fun,

Brooke Clarke

-- 
w/Java http://www.PRC68.com
w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml
http://www.precisionclock.com




Ulrich Bangert wrote:

>Hi Brooke,
>
>thank you for the links! I wish one would explain this method to me and
>the rest of the newsgroup in the speak typical for time nuts. Is it
>really something that I can do in reality? What is the cost of the
>Ashtech receiver? Why is this method un-discussed here?
>
>Best regards
>Ulrich Bangert 
>