Radio Wave Propagation Modeling, Prediction and Assessment (L'Evaluation, la Prevision et la Modelisation des Ondes Hertziennes).

摘要

An overview of important topics in radio wave propagation modeling, prediction and assessment is presented. Both propagation in the troposphere and the ionosphere are considered. For tropospheric radio wave propagation major emphasis is given to military systems operating in a marine environment. Various modeling techniques are discussed and operational propagation assessment systems described. Modeling and refractivity sensing of horizontally varying media are identified as topics of high interest. Ionospheric propagation is divided into four areas: long wave, short wave, transionospheric propagation and scintillation phenomena. Various modelling techniques for long wave propagation and areas which require further attention are discussed. Short wave propagation remains the area of high interest and improved sensing techniques. Similarly, future advances for predicting transionospheric propagation require both improved models and sensing techniques. In the area of ionospheric scintillations, both stochastic and morphological models are described. The need for an improved understanding of the solar and geomagnetic dependence of ionospheric scintillation is stressed. In addition, ground wave propagation is covered. An overview is also presented describing the structure of and the material available from the International Radio Consultative Committee.