Different WAAS altitude readings

Got it. Thanks for your help. I found the following on the net and it was
most useful.

http://www.esri.com/news/arcuser/0703/geoid2of3.html

"Ron Rosenfeld" wrote in message
...
On Sun, 27 Jun 2004 13:49:48 GMT, "Wyatt Emmerich"
wrote:

But this was the difference between two GPS altitudes, both reporting
that
they had WAAS receptivity.

And as I posted, you were using two different non-certified units.

What makes you believe they were using the same standards and algorithm to
translate the GPS signal into an equivalent for a barometric altitude.

You can obtain further information from the sites I mentioned, and by
using
Google.


Ron (EPM) (N5843Q, Mooney M20E) (CP, ASEL, ASES, IA)

"John R. Copeland" wrote:

..

It might be my own eagerness making me expect LPV capability.
I've been trying hard to be patient, waiting for FAA approval of v2.0,
whereupon I hope the plans will all become clear to the rest of us.
Or is that hope too optimistic?
---JRC---

Not if Garmin pushes hard enough. The FAA is responsive to a major company like Garmin, provided the
company pushes hard enough. An example is the very recent certification of the Garmin 1000 for the
Cessna 182/206 and one of the Diamond models.