Re: NPPL in Scotland


"Peter" <nobody@xxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:itn8r15eh02r3dj6al50gm9tb4h1v169v7@xxxxxxxxxx
>
> "Greg" <news@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote
>
> So, let's say you use some GPS/GSM scheme to implement road use
> charging. Obviously, one would use the GPS signal to tell the
> vehicle-mounted device where the vehicle is. The device would then
> transmit (using GSM) that the user should be billed for using that
> road.
>
> Pretty obviously, removing power from the device will do just nicely.

And pretty obviously they just fine you if your car is not visible to the
system for a significant time! That car battery is good enough to keep it in
touch once every few minutes for months on end if parked up. The whole point
in their plans is to avoid having to build a new infrastructure such as the
one they did in London, instead they just mandate that every car has to be
fitted with a black box, at the owner's expense of course, and the jobs
done. Of course it would be a dam sight cheaper to collect the tax by
putting up income tax but we are dealing with politics here.

> As for not relying on the Americans, this is a really stupid argument
> which doesn't stand up to scrutiny in any realistic scenario.
> Selective Availability was turned off some years ago. Even when it was
> turned on, the error was of the order of 100-200m which is utterly
> irrelevant for en route aviation requirements.

But that error is not irrelevant for the vast majority of new applications,
remember that aviation will be a tiny user of the system compared to all the
other uses.

> Also, any threat to the USA big enough to make them mess with their
> economic dependence on GPS would almost certainly apply equally to
> Europe - a major terrorist threat being the obvious candidate.

When the US limited the accuracy of GPS for civilians they did not limit it
for their military, the system was capable of such discrimination and
presumably still is.

> What G's proponents will probably do (IF the system ever goes into
> operation) is to encrypt a part of the signal, and try to authorise
> GPS approaches only if the aircraft is carrying a decoder which has to
> be paid for. But this doesn't make sense either because all commercial
> aviation manages perfectly well with conventional landing aids such as
> ILS, and INS with DME/DME does all the en route stuff. So who would
> pay for it? Almost nobody.

Again, you seem to think it's all about aviation when it isn't, all the
other applications will pay for it because there's so much money to be
saved.
But sticking to aviation, the big plan is to scrap all the antiquated and
costly nav aid infrastructure and replace it with sat nav, not only for
navigating around the world but also for approaches AND taxying around
airports. This opens up flight in zero visibility which is currently
impossible as you can land but not taxy away!. Such systems are already
being tried out using GPS with local augmentation and clearly have huge
financial benefits if they let you fly when you otherwise could not.

> None of this stands up to any scrutiny.

The world begs to differ...

Greg


.

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