RECOMMENDATION ITU-R P.453-9 - The radio refractive index: its formula and refractivity data
RECOMMENDATION ITU-R P.453-9
The radio refractive index: its formula and refractivity data
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