Meaning of SURFACE REFRACTIVITY in English

SURFACE REFRACTIVITY

The refractive index of the Earth's atmosphere, calculated from observations of pressure, temperature, and humidity at the surface of the Earth. ( 188 ) Note: The surface refractivity gradient is the difference in refractive index between the surface and a given altitude, such as between the surface and 1000 m.

Telecommunication standard terms English vocab.      Английский словарь стандартных телекоммуникационных терминов.