Android Question Library OSMDroid and elevation angle


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This function should be used to calculate the angle of elevation of a point above the horizon. Perhaps it is not very accurate, however does not take into account atmospheric refraction and the height above sea level of the observer.
Sub GetElevation(Alt1 As Double, Alt2 As Int, Distance As Float) As Float
   Dim Lambda As Float
  Lambda = ATanD ((Alt1-Alt2)/Distance)
   Return Lambda
End Sub
Is there any library function OSMDroid that allows you to get a more accurate result ?
Thank you for your attention.
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