Research Catalog

A note on antipodal focussing

Title
A note on antipodal focussing / James R. Wait.
Author
Wait, James R.
Publication
Washington, D.C. : National Bureau of Standards, 1963.

Items in the Library & Off-site

Filter by

1 Item

StatusFormatAccessCall NumberItem Location
Request for On-site UseRequest Scan
How do I pick up this item and when will it be ready?
TextUse in library 9298.952.2Off-site

Details

Additional Authors
  • Central Radio Propagation Laboratory (U.S.)
  • United States. National Bureau of Standards.
  • Boulder Laboratories (U.S.)
  • United States. Department of Commerce.
Description
9 pages : illustration, charts; 27 cm
Summary
There has been some interest shown recently in the practical significance of the antipodal focussing in VLF propagation. If the earth and the ionosphere were perfectly concentric spherical surfaces, theory indicates that the amplitude of the field should build up to a maximum at the geographic antipodal point of the transmitter. In the language of optice, this point may be called an axial caustic. It is the purpose of the present paper to discuss this matter further. To shed some light on the subject, a very simple perturbation of the ideal model is considered. Essentially, it is assumed that the illumination of the antipodal region is non-uniform.
Series Statement
National Bureau of Standards. Technical note ; 182
Uniform Title
NBS technical note ; 182.
Alternative Title
Antipodal focussing
Subject
  • Radio waves
  • Radio Waves
  • Radio waves
Genre/Form
  • technical reports.
  • Technical reports.
  • Rapports techniques.
Note
  • Issued August 20, 1963.
OCLC
  • ocm11142824
  • 11142824
  • SCSB-453459
Owning Institutions
Princeton University Library