re: Loran C not dead:
Bush
ago as an engineer and joined a group of similar individuals starting
a tech company in a Boston suburb. I ran into him at a family
gathering a couple of weeks ago asking him what he'd been working on
and the reply was "Loran E" or enhanced Loran. In fact the guy that
invented the thing and 80 years old, is working with them. This, as
with so many new many security measures is a child of 9-11. "Basically
the satellites are just too easy of a target", enough said. I'd watch
for this IPO. Anyone own Navteq?
Have a great one!
Bush
Ron Natalie
"Basically
> the satellites are just too easy of a target", enough said. I'd watch
> for this IPO. Anyone own Navteq?
>
> Have a great one!
>
> Bush
a lot easier than a bunch of radio towers sitting on the ground.
Jim Stewart
Yeah, but you can rebuild a tower a hell
of a lot easier than a satellite.
Steven P. McNicoll
"Ron Natalie" <r...@spamcop.net> wrote in message
news:473a464f$0$19256$9a6e...@news.newshosting.com...
>
> Yeah, they're going to hit a satellite in geosynchronous orbit
> a lot easier than a bunch of radio towers sitting on the ground.
>
Nit: The GPS constellation is not in geosynchronous orbit.
ji...@specsol.spam.sux.com
GPS satellites are not in geosynchronous orbit and it is trivially
easy to jam GPS.
It is a lot more difficult to jam Loran effectively over a wide area.
--
Jim Pennino
Remove .spam.sux to reply.
Ron Natalie
> Yeah, but you can rebuild a tower a hell
> of a lot easier than a satellite.
>
That's one of the reasons why we have 31 of them.
Ron Natalie
>
> GPS satellites are not in geosynchronous orbit and it is trivially
> easy to jam GPS.
Correct on the geosynchronous, typing faster than the brain.
It's not trivially easy to jam GPS. Possible yes, but not exactly
trivial.
>
> It is a lot more difficult to jam Loran effectively over a wide area.
>
Yeah, it juts takes a thunderstorm.
ji...@specsol.spam.sux.com
> >
> > GPS satellites are not in geosynchronous orbit and it is trivially
> > easy to jam GPS.
> Correct on the geosynchronous, typing faster than the brain.
> It's not trivially easy to jam GPS. Possible yes, but not exactly
> trivial.
I'm afraid it is pretty trivial.
The signal strength of the GPS satellites is quite low.
It doesn't take much of a transmitter to overload the receiver front
end of every GPS for quite a distance.
A physically small transmitter hung from a balloon could wipe out all
GPS in a high traffic area such as LA or New York for days.
> >
> > It is a lot more difficult to jam Loran effectively over a wide area.
> >
> Yeah, it juts takes a thunderstorm.
Apples and oranges; GPS is also subject to interruption from natural
causes and the subject was intentional jamming.
Loran is more difficult to jam because the transmitted power levels
are in the kilowatt to megawatt range and the physical size of
an effective transmitter antenna even with loading is huge.
While building a megawatt transmitter and antenna for it isn't
technically difficult, it would be trivial to find it and shut it
down.
Mxsmanic
> Correct on the geosynchronous, typing faster than the brain.
> It's not trivially easy to jam GPS. Possible yes, but not exactly
> trivial.
It is indeed trivially easy to jam, and it is also very easy to spoof if the
signal is not encrypted.
Bertie the Bunyip
news:p78pj35oeu0elb8vk...@4ax.com:
> Ron Natalie writes:
>
>> Correct on the geosynchronous, typing faster than the brain.
>> It's not trivially easy to jam GPS. Possible yes, but not exactly
>> trivial.
>
> It is indeed trivially easy to jam,
You're a fjukkwit.
Bertie