## Techniques for Computing Refraction of Radio Waves in the TroposphereU.S. Department of Commerce, Office of Technical Standards, 1961 - Atmospheric radio refractivity - 55 pages |

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accuracy accurate Anderson Appendix Applied approach approximation assumed average Bean and Thayer becomes bending Bureau of Standards calculation Computation constant correcting corresponding decrease defined departures determined dN/dh ducting earth's surface effective earth's radius Engineering equation error evaluate expected exponential atmosphere exponential model exponential reference atmosphere figure Frequency function G. D. Thayer Geometry given graphical method height High included indicated initial elevation angle initial gradient integral kilometer layer less linear interpolation lines listed Materials means Measurements Mechanical meters method milliradians National Bureau necessary normal Note observed obtained percent Physics predicted present problem publications published radio propagation radio ray radio waves range ray path refractive index regression Research result Sample Computation Schulkin's Services shown similar Standards statistical surface Systems Technical technique term TROPOSPHERE true units variables various yields