# The Transmission of Electric Waves Round the Earth

@article{WatsonTheTO, title={The Transmission of Electric Waves Round the Earth}, author={George Neville Watson}, journal={Proceedings of The Royal Society A: Mathematical, Physical and Engineering Sciences}, volume={95}, pages={546-563} }

On the hypothesis that the Earth consists of an imperfectly conducting sphere surrounded by infinite homogeneous dielectric, I have recently obtained a complete solution (in a form adapted for numerical computation) of the problem of determining the effect at a distant point of the Earth’s surface due to a Hertzian oscillator emitting waves of a definite frequency. Previous investigators had obtained approximations (some of which were incorrect) to the dominant terms of the series which…

## 94 Citations

### I. The propagation of a radio-atmospheric

- Physics
- 1951

Summary Previous authors have discussed the propagation of radio-atmospherics by assuming that the space between the earth's surface and the ionosphere behaves like a wave-guide. If the surfaces of…

### THE MODE THEORY OF VLF RADIO PROPAGATION FOR A SPHERICAL EARTH AND A CONCENTRIC ANISOTROPIC IONOSPHERE

- Physics, Geology
- 1963

The theory of the propagation of electromagnetic waves in the space between a spherical conducting earth and a concentric ionospheric reflecting layer is treated. The problem is idealized to the…

### The earth‐ionosphere cavity

- Physics
- 1976

To analyze ELF wave propagation in the earth-ionosphere cavity, a flat earth approximation may be derived from the exact equations, which are applicable to the spherical cavity, by introducing a…

### Normal waves of the anisotropic Earth-ionosphere waveguide in the VLF-ULF range

- Physics, Geology
- 2007

[1] The problem on determination of the electromagnetic field of a near-Earth horizontal electric dipole in the frequency range 10−1 − 10 Hz at distances 10−1 − 10 km in the Earth–ionosphere…

### Introduction to the Theory of VLF Propagation

- PhysicsProceedings of the IRE
- 1962

This paper is a self-contained exposition of the conventional theory of propagation of VLF radio waves. The model is a spherical earth surrounded by a concentric ionosphere. Although the model is…

### Numerical Computations of Terrestrial ELF Electromagnetic Wave Fields in the Frequency Domain

- Physics, Geology
- 1970

The zero-order term of the residue series has been employed to calculate the variation of field strength with distance over the earth's surface in the frequency band 7.8 Hz to 1 kHz. Spherical…

### The ionosphere as the secondary conductor of a transformer for ELF

- Physics
- 1973

A study is made of the physics of radiation into the guide between the earth and the ionosphere from a center-fed antenna consisting of a long horizontal wire grounded at its two ends. The length of…

### Long-Range Propagation of Low-Frequency Radio Waves between the Earth and the Ionosphere

- Physics, GeologyProceedings of the IRE
- 1956

The problem of modes of propagation of electromagnetic waves between a perfectly conducting earth and a gradually varying ionosphere is considered. The case of exponentially varying ionospheric…

### Observations on the Propagation Constant of the EarthIonosphere Waveguide in the Frequency Band 8 c/s to 16 kc/s†

- Physics
- 1966

Recent observations at King's College, London, concerning the determination of the propagation constant (attenuation and phase velocity) of electromagnetic waves over the earth's surface are…