[derez]

Agraham
I used this code to display both altitudes on the same form:

If gpsd.SeaLevelAltitude <> gpsd.InvalidData Then
t_alt = gpsd.SeaLevelAltitude
tb1.Text = t_alt
If gpsd.EllipsoidAltitude<> gpsd.InvalidData Then tb2.Text = gpsd.EllipsoidAltitude Else tb2.Text = "x"
End If

what I see is that while the sealevel Alt is changing , as a result of non-optimized satellites reception, the ellipsoid is static. It is not functioning correctly, at least in my device and program.
Can you please check or tell me what I'm doing wrong ?

thanks