Accession Number : ADA119967

Title :   Detailed Observations of the Source of Terrestrial Narrowband Electromagnetic Radiation.

Descriptive Note : Progress rept.,

Corporate Author : IOWA UNIV IOWA CITY DEPT OF PHYSICS AND ASTRONOMY

Personal Author(s) : Kurth,W S

PDF Url : ADA119967

Report Date : 27 Aug 1982

Pagination or Media Count : 26

Abstract : We present detailed observations of a region near the terrestrial plasmapause where narrowband electromagnetic radiation (previously called escaping nonthermal continuum radiation) is being generated. These observations show a direct correspondence between the narrowband radio emissions and electron cyclotron harmonic waves near the upper hybrid resonance frequency. In addition, electromagnetic radiation propagating in the Z-mode is observed in the source region which provides an extremely accurate determination of the electron plasma frequency and, hence, density profile of the source region. The data strongly suggest the electrostatic waves and not Cerenkov radiation are the source of the banded radio emissions and clearly define the coupling mechanism which must be described by any viable theory.

Descriptors :   *Electromagnetic wave propagation, *Terrestrial radiation, *Radio sources(Astronomy), Narrowband, Electrostatic fields, Cerenkov radiation, Electromagnetic radiation

Subject Categories : Astronomy
      Atmospheric Physics
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE