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Start Over Creator Chvojková, E.

2. Radio communication in astronautics from the geometrical point of view

Creator:
Chvojková, E.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
astronautics, satellites, and radio communication
Language:
Czech
Description:
The launching of man-made satellites required some new urgent scientific and technical investigations. One of them was the establishment of a simple method of determining the path of a ray, adapted for fixing the optimum condition at which a radio connection between any two points of the Universe can be realized. Recently the solution of three important radio-communication problems has been put on the list of urgent requirements: 1. The radio communication between any two points of the Earth surface at any time, season or solar activity. 2. The radio communication between any point of the Earth surface and any point of the Universe. 3. The connection between visitors of a smáli planet with a rare atmosphere, especially if one of them has disappeared below the horizon, up to the antipodal point. The theory of radio propagation, elaborated in Chapter 3, shows that the trajectory of a wave which is passing through a spherical ionized layer can generally be found by merely knowing the critical frequency ~ of the layer and the whole quantity of electrons present in the layer. (We need not to know the distribution of electrondensity diV/dr with height as it has been supposed previously.) Consequently, in order to gain the best information about a rádio trajectory it is necesary to know the critical frequency of the F2-layer anywhere on the Earth at any time season and solar activity (Chapter 1), to be able to predict the sunspot number (Chapter 2), to elaborate a simple but precise theory of radio propagation (Chapter 3). Taking into account the results of these three chapters we were able to elaborate a very practical method which made it possible to determine the best conditions for any terrestrial or astronautical connection. (Chapter 4.) The main idea of the first two chapters will be mentioned only briefly but the chapter 3 and 4 will be reproduced in greater detail. References to the equations or figures of the Russian text are indicated by three numbers: the chapter, the section and the equation, figure or advise on literature.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public