[ntp:questions] Re: First Galileo satellite launched

Danny Mayer mayer at ntp.isc.org
Thu Dec 29 03:43:08 UTC 2005


I had no agenda here. I was just pointing to the announcement. Galileo
will be a rival to US's GPS system. I am aware that military get much
higher accuracy and for that matter the manufacturers for military
versions of GPS charge a great deal of money for it. Think US Luxury car

What Galileo will certainly do is push down pricing and increase
availability. I'm not sure how many non-military applications really
need 1-meter or better accuracy but presumably it will loosen the GPS


David L. Mills wrote:
> Danny & Co.,
> 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
> secret.
> 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.
> Dave
> Danny Mayer wrote:
>> Giove-A has been successfully launched and is a precursor to the full
>> Galileo satellite navigation system. Its payload include two rubidium
>> atomic clocks.
>> http://news.bbc.co.uk/2/hi/science/nature/4555298.stm
>> Danny
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