Farfield Extremely Low Frequency Propagation Measurements, May 72.

Abstract

From 1-19 May 1972, the New London Laboratory of the Naval Underwater Systems Center measured farfield, extremely low frequency (ELF) horizontal magnetic field strengths in Anchorage, Alaska, and Sondre, Greenland. At the same time, MIT Lincoln Laboratory measured field strengths in Norway, Greece, and Saipan. At each location, the horizontal magnetic field strengths were measured in bands of frequencies centered at 45 Hz and 75 Hz to determine the average attenuation rates and relative excitation factors for daytime propagation. The U. S. Navy ELF Wisconsin Test Facility was the transmitter. The principal conclusion from these measurements is that auroral-zone effects are present at extremely low frequencies. (Author)

Document Details

Document Type
Technical Report
Publication Date
Apr 02, 1974
Accession Number
AD0778328

Entities

People

  • Edwin A. Wolkoff
  • J. Robert Katan
  • Peter R. Bannister
  • William A. Kraimer

Organizations

  • Naval Underwater Systems Center

Tags

DTIC Thesaurus Topics

  • Attenuation
  • Buildings And Structures
  • Excitation
  • Extremely Low Frequency
  • Frequency
  • Greenland
  • Magnetic Fields
  • Measurement
  • Research Facilities
  • Test Facilities
  • Transmitters
  • Wisconsin

Readers

  • Acoustics.
  • Space/Atmospheric Physics.