Above-the-earth field contours for a dipole buried in a homgeneous half-space

Details

• Personal Author:
  Shope, Steven M.
• Corporate Authors:
  United States. Bureau of Mines
• Description:
  "An essential element of the Bureau of Mines electromagnetic location and communication system for trapped miners is a quantitative knowledge of the surface and above-surface electromagnetic fields created by an underground transmitter. The field solutions given in this report use approximations in which the displacement currents are negligible for low frequencies. The earth is represented by a homogeneous half-space model in which a dipole source is immersed. The vertical magnetic field equipotential contours at and above the surface are graphically mapped. The volumes of the regions bounded by these contours are directly related to the geometrical zones of signal detectability. Knowledge of the detectability zones will enable the proper search strategies to be developed for airborne detection of trapped miners." - NIOSHTIC-2
  
  NIOSHTIC no. 10003055
  
  
• Subjects:
  Occupational Health Safety
• Series:
  Mining Publications
• Subseries:
  Report of Investigations
• Document Type:
  Text
• Genre:
  Report
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  14 numbered pages
• NIOSHTIC Number:
  nn:10003055
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:52ed53363a2610ea5afe3b4427fcdeb512db66c21a56970c1b2f1571f0d75b8bade3dd50fb2eca9d1009fcbcc255b91159a5ba6ccc0cfb7a581119c341e46946
• Download URL:
  https://stacks.cdc.gov/view/cdc/9615/cdc_9615_DS1.pdf
• File Type:
  [PDF - 341.49 KB ]