Titlebook: Radiowave Propagation in Satellite Communications; Louis J. Ippolito Book 1986 Van Nostrand Reinhold Company Inc. 1986 satellite communica

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書目名稱Radiowave Propagation in Satellite Communications影響因子(影響力)




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Invertebrate

Attenuation by Atmospheric Gases, expected attenuation for a radiowave link are presented. Examples are given for atmospheric attenuation at several of the frequencies of interest for space communications systems. Atmospheric gases also affect radio communications by adding atmospheric noise (i.e., radio noise) to the link. This problem is described fully in Chapter 7.

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Restoration Techniques for Overcoming Severe Attenuation,sized antennas and with RF power within allowable levels. RF power levels are most likely constrained by prime power limitations on the satellite, and by radiated power limitations on the ground fixed by international agreement.

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MOAN

right-atrium

Introduction,applications. These satellite systems rely on the transmission of radiowaves to and from the satellite and are dependent on the propagation characteristics of the transmission path, primarily the earth’s atmosphere. Radiowave propagation thus plays an important part in the design and ultimate perfor

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Fundamentals of Radiowave Propagation,enna gain, and polarization, are defined. Radiowave propagation modes and propagation mechanisms are discussed and the importance of the ionosphere and the troposphere in space communications is highlighted. Finally, the major radio-wave propagation factors in the frequency bands of interest to spac

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Attenuation by Atmospheric Gases,ission path. Signal degradation can be minor or severe, depending on frequency, temperature, pressure, and water vapor concentration. In this chapter the effects of atmospheric gases, primarily oxygen and water vapor at space communications frequencies, are discussed, and methods for calculating the