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)