writes:

YOUR GPS receiver is not designed for vertical accuracy because you are
too poor to be able to afford a decent one.

The GPS system is not designed for vertical accuracy. It was designed as an
aid to lateral navigation. The geometry of the system does not favor vertical
accuracy.

I can point you to dozens of sites with similar data and the GPS
specs as well, but you could just do it yourself and admit for once
that you are wrong.

I can point you to dozens of sites that "prove" that Denver's airport overlies
a huge alien base underground, but that doesn't make it so.

Regulations, the nature of real air, the way real airplanes fly and
common sense.

If GPS were accurate, why would any of these other factors make a difference?

Beg for some money, give the money to a CFI, and it will be explained
in detail to you.

I know a lot more about how GPS works than the typical CFI.

Regulations, the nature of real air, the way real airplanes fly and
common sense.

See above. Why wouldn't regulations allow something that is as accurate as
you say?

YOUR GPS receiver is not designed for vertical accuracy because you are
too poor to be able to afford a decent one.

They cannot be designed for vertical accuracy. The system itself is not
designed for that.

MY non-WAAS, aviation GPS receiver measures altitude that is within about
+/- 15 feet, or about +/- 4m, which is what everyone with a real GPS
gets.

How do you know?

I doubt the time accuracy on your piece of crap GPS is anywhere near
the nanosecond capabilities of a decent receiver either.

Actually, they all need nanosecond accuracy. But if you know how GPS works,
you already know that, right?