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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