Policy on Intellectual Property Right (IPR)
Annex 1
 1     The formula for the radio refractive index
 2     Surface refractivity and height dependence
        2.1     Refractivity as a function of height
        2.2     Wet term of the surface refractivity
 3     Vertical refractivity gradients
        3.1     In the first kilometre of the atmosphere
        3.2     In the lowest atmospheric layer
 4     Statistical distribution of refractivity gradients
 5     Surface and elevated ducts