Accession Number : AD0654358

Title :   THE TRANSMISSION MEDIA IN SPACE COMMUNICATION,

Corporate Author : JOHNS HOPKINS UNIV SILVER SPRING MD APPLIED PHYSICS LAB

Personal Author(s) : Katz,Isadore

Report Date : 15 MAY 1960

Pagination or Media Count : 27

Abstract : Communicating with a space vehicle entails transmission above and through the earth's atmosphere. Propagated radio energy is modified in various ways. The electromagnetic waves are bent, scattered, absorbed and their plane of polarization is rotated. The energy travels through the troposphere, the ionosphere, the Van Allen belts and the interplanetary regions. How these influence the propagation of radio waves is determined by the index of refraction and this is a function of the radio frequency. Rapid progress is currently being made in determining the physical state of the regions under discussion. The present knowledge of the state of these media is reviewed. (Author)

Descriptors :   (*RADIO TRANSMISSION, SPACE COMMUNICATIONS), SPACE ENVIRONMENTS, ELECTROMAGNETIC RADIATION, REFRACTIVE INDEX, ATMOSPHERES, VAN ALLEN RADIATION BELT, RADIOFREQUENCY INTERFERENCE, ATTENUATION, IONOSPHERE, ELECTRON DENSITY, TROPOSPHERE, PROPAGATION

Subject Categories : Radiofrequency Wave Propagation
      Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE