Modified refractive index

From International Dictionary of Marine Aids to Navigation
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4-1-890

For a given height above sea level the sum of the refractive index of the air at this height and the ratio of the height to the radius of the earth.

Reference: C.C.I.R.




Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)

Contrast

Celsius (previously Centigrade)

Capacitance

charge current

Intensity

International Association of Marine Aids to Navigation and Lighthouse Authorities - AISM