Find scale factor to Sea Level.
[Visual Basic .NET] Public Sub GroundToSeaLevelFactor ( _ ByRef pPosn As Double, _ ByVal height As Double, _ ByRef pFactor As Double _ )
[C#] public void GroundToSeaLevelFactor ( ref double pPosn, ref double height, ref double pFactor );
Product Availability
Available with ArcGIS Desktop.