[ntp:questions] Re: First Galileo satellite launched
hmurray at suespammers.org
Wed Dec 28 21:41:46 UTC 2005
>I'm not a defender of any political agenda here, but I would like to
>correct the general assumption, as evident in the interviews last night,
>that the Galileo system is more accurate than the GPS system. The GPS L1
>signal available to the general public has a nominal accuracy (PDoP) of
>30 meters; however, with the L2 signal and P code with capable receiver,
>it has a nominal PDoP of one meter, comparable to Galileo. The P code is
>available only to the USA military at present. I would assume once
>Galileo reaches operational status there is no need to keep the P code
Does position accuracy translate directly into timing accuracy?
Is 30 meters still the right number for GPS? I thought they turned
off the scrambling a while ago and L1 only is now good for 10 meters.
>Folks might forget the Russian GLONASS system, which is very similar to
>GPS and Galileo, has been around for over twenty years. It is not clear
>how long it will last or whether it can be maintained to the order of
>GPS and Galileo.
Are any GLONASS receivers available at a modest price?
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