Standard Refraction

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Standard Refraction

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The refraction which would occur in an idealized atmosphere in which the index of refraction decreases uniformly with height at the rate of 39 X 10E-6 per kilometer. See standard propagation. </dd>
Standard refraction may be included in ground-wave calculations by use of an effective earth radius of 8.5 X 10E6 meters, or four-thirds the geometrical radius of the earth. </dd>

References

This article is based on NASA's Dictionary of Technical Terms for Aerospace Use