Mxsmanic wrote:
writes:

You have no clue what the jamming susceptibility of modern GPS is or what
features exist (current and planned) to thwart it.

Actually I do, as I've been following GPS since long before the average person
became aware of its existence. I'm afraid jamming is a serious potential
problem, for a number of reasons related directly to the technology of GPS and
to satellite communications in general. Spoofing is a serious issue, too,
which is why the DoD started encrypting its P code years ago. Unfortunately,
encryption is not a realistic option for civil aviation users, because of the
logistics of key distribution, and because it would make the signal unusable
to other user communities.

Actually, you show you are clueless.

Minimizing the effects of jamming for anything other than a military grade,
high power jammer is a fairly trivial problem but civilians have no interest
as it is in the real civilian world a non problem not worth spending a single
dime.

In reality, jamming effects a small area and is a real concern only to the
military which would expect jamming in the area of enemy targets.

Anyone can jam a GPS signal, and a small area is more than sufficient--if it
happens to be centered on New York City, for example. Spoofing requires more
sophistication, but hardly anything unattainable for bad guys.

Yeah, and anyone can make a big bomb and blow up a building.

The response to both would be the same.

Which is but one reason civilian jamming is a non problem.

A solar flare large enough to "knock them all out at once" would also take
out a lot of other stuff making the lack of GPS a minor issue.

If GPS is the only navigation option, it's a major issue even if other systems
are affected as well. VORs, at least, would still be available.

What makes you think that?

What makes you think that if there were a solar flare large enough to "knock
them all out at once" there would even be a functioning power grid?

--
Jim Pennino

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