• A discussion on the three-dimensional boundary value problem for electromagnetic fields [PDF - 123.86 KB] Personal Author: Rankin, David Conference Authors: Thru-the-Earth-Electromagnetics Workshop (1973 : Colorado School of Mines) Published Date: 1973 Source: Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines, p. 92-94 Series: Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines Description: Three -dimensional boundary value problems are difficult to solve. Indeed, while the separation of the scalar wave equation can be effected in 11 diff... File Type: [PDF - 123.86 KB] File Type: [PDF - 123.86 KB] The perturbation of alternating electromagnetic fields by three-dimensional bodies [PDF - 143.65 KB] Personal Author: Jones, F. W. Conference Authors: Thru-the-Earth-Electromagnetics Workshop (1973 : Colorado School of Mines) Published Date: 1973 Source: Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines, p. 86-91 Series: Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines Description: The perturbation of alternating electromagnetic fields by three-dimensional structures is considered. The general model is that of a semi-infinite con... File Type: [PDF - 143.65 KB] File Type: [PDF - 143.65 KB] Performance of manpack electromagnetic location equipment in trapped miner location tests [PDF - 1010.41 KB] Personal Author: Farstad, Arnold J. Conference Authors: Thru-the-Earth-Electromagnetics Workshop (1973 : Colorado School of Mines) Published Date: 1973 Source: Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines, p. 62-72 Series: Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines Description: The use of radio signals for underground communications was considered as early as the mid-1920's [1] - [4] . However, early experiments did not produ... File Type: [PDF - 1010.41 KB] File Type: [PDF - 1010.41 KB] An underground electromagnetic sounder experiment [PDF - 31.08 KB] Personal Author: Dolphin, Lambert ; Bollen, Robert ; ... Conference Authors: Thru-the-Earth-Electromagnetics Workshop (1973 : Colorado School of Mines) Published Date: 1973 Source: Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines, p. 168 Series: Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines Description: An electromagnetic sounder developed for an archaeological application in Egypt has been successfully tested in a California dolomite mine. Chambers i... File Type: [PDF - 31.08 KB] File Type: [PDF - 31.08 KB] Feasibility of a radiocommunication in mine galleries by means of a coaxial cable having a high coupling impedance [PDF - 326.47 KB] Personal Author: Fontaine, J. ; Demoulin, B. ; ... Conference Authors: Thru-the-Earth-Electromagnetics Workshop (1973 : Colorado School of Mines) Published Date: 1973 Source: Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines, p. 130-139 Series: Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines Description: To realize a radiowave communication along mine galleries a few kilometers long without repeater, we show that it is possible to use a coaxial cable b... File Type: [PDF - 326.47 KB] File Type: [PDF - 326.47 KB] Objectives and constraints of through-the-earth electromagnetic communication systems [PDF - 502.00 KB] Personal Author: Parkinson, Howard E. Conference Authors: Thru-the-Earth-Electromagnetics Workshop (1973 : Colorado School of Mines) Published Date: 1973 Source: Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines, p. 1-8 Series: Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines Description: In 1969, new coal mine health and safety legislation was enacted in the United States. As a result of this legislation, the Department of Interior, Bu... File Type: [PDF - 502.00 KB] File Type: [PDF - 502.00 KB] State of knowledge of analytical techniques for thru-the-earth electromagnetic wave problems relevant to mine rescue [PDF - 232.46 KB] Personal Author: Wait, James R. Conference Authors: Thru-the-Earth-Electromagnetics Workshop (1973 : Colorado School of Mines) Published Date: 1973 Source: Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines, p. 9-14 Series: Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines Description: It is the purpose of this paper to review theoretical model concepts in through- the -earth transmission of electromagnetic waves. While the subject i... File Type: [PDF - 232.46 KB] File Type: [PDF - 232.46 KB] Summary report on electromagnetic noise measurement program [PDF - 37.61 KB] Personal Author: Adams, John W. Conference Authors: Thru-the-Earth-Electromagnetics Workshop (1973 : Colorado School of Mines) Published Date: 1973 Source: Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines, p. 169 Series: Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines Description: The present status of the National Bureau of Standards program is that many magnetic tapes of analog data have been recorded in four major mines. Each... File Type: [PDF - 37.61 KB] File Type: [PDF - 37.61 KB] Electromagnetic survey method applicable to underground quarries; proceedings of thru-the-earth electromagnetics workshop [PDF - 739.67 KB] Personal Author: Gabillard, R. ; Dubus, J. P. ; ... Conference Authors: Thru-the-Earth-Electromagnetics Workshop (1973 : Colorado School of Mines) Published Date: 1973 Source: Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines, p. 121-129 Series: Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines Description: We present an electromagnetic method taken from the well known radiogoniometer that allows us to locate at the surface of the ground the vertical axis... File Type: [PDF - 739.67 KB] File Type: [PDF - 739.67 KB] Theory of the propagation of UHF radio waves in coal mine tunnels [PDF - 500.48 KB] Personal Author: Emslie, Alfred G. ; Lagace, Robert L. ; ... Conference Authors: Thru-the-Earth-Electromagnetics Workshop (1973 : Colorado School of Mines) Published Date: 1973 Source: Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines, p. 38-48 Series: Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines Description: This paper is concerned with the theoretical study of UHF radio communication in coal mines, with particular reference to the rate of loss of signal s... File Type: [PDF - 500.48 KB] File Type: [PDF - 500.48 KB] Summary report of operational communications working group [PDF - 640.36 KB] Personal Author: Roetter, Martyn F. Conference Authors: Thru-the-Earth-Electromagnetics Workshop (1973 : Colorado School of Mines) Published Date: 1973 Source: Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines, p. 202-217 Series: Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines File Type: [PDF - 640.36 KB] File Type: [PDF - 640.36 KB] Theory and experiments relating to electromagnetic fields of buried sources with consequences to communication and location [PDF - 370.87 KB] Personal Author: Geyer, Richard G. Conference Authors: Thru-the-Earth-Electromagnetics Workshop (1973 : Colorado School of Mines) Published Date: 1973 Source: Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines, p. 20-33 Series: Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines Description: One aspect of a program to improve the chances of survival following coal mine disasters is the development of a communications system which will allo... File Type: [PDF - 370.87 KB] File Type: [PDF - 370.87 KB] Guided propagation of radio waves [PDF - 193.64 KB] Personal Author: Delogne, P. ; Deryck, L. ; ... Conference Authors: Thru-the-Earth-Electromagnetics Workshop (1973 : Colorado School of Mines) Published Date: 1973 Source: Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines, p. 48-53 Series: Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines Description: So far as the propagation of electromagnetic waves is concerned, an underground tunnel behaves like a pipe or hollowed waveguide. Waves propagate in t... File Type: [PDF - 193.64 KB] File Type: [PDF - 193.64 KB] Use of the zonal harmonic series for obtaining numerical solutions to electromagnetic boundary value problems [PDF - 522.62 KB] Personal Author: Lewis, Richard L. Conference Authors: Thru-the-Earth-Electromagnetics Workshop (1973 : Colorado School of Mines) Published Date: 1973 Source: Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines, p. 98-103 Series: Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines Description: This is a discussion of the application of the zonal harmonic series to problems involving dipole sources in the vicinity of spherical boundaries. The... File Type: [PDF - 522.62 KB] File Type: [PDF - 522.62 KB] Admittance and effective height of buried antennas [PDF - 27.45 KB] Personal Author: Franceschetti, Giorgio Conference Authors: Thru-the-Earth-Electromagnetics Workshop (1973 : Colorado School of Mines) Published Date: 1973 Source: Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines, p. 162-167 Series: Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines Description: Explicit expressions are presented for the input admittance and effective height of several buried metal antennas, namely: (i) prolate spheroidal; (ii... File Type: [PDF - 27.45 KB] File Type: [PDF - 27.45 KB] Electromagnetic transmission and detection at deep depths [PDF - 273.87 KB] Personal Author: Starkey, D. B. Conference Authors: Thru-the-Earth-Electromagnetics Workshop (1973 : Colorado School of Mines) Published Date: 1973 Source: Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines, p. 140-148 Series: Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines Description: nvestigation into the expressions of the field produced by a loop over a conducting half space or in an infinite conducting half space are well docume... File Type: [PDF - 273.87 KB] File Type: [PDF - 273.87 KB] Experimental comparison of buried and elevated ELF transmitting antennas [PDF - 249.63 KB] Personal Author: Bannister, Peter R. ; Williams, Frederick J. ; ... Conference Authors: Thru-the-Earth-Electromagnetics Workshop (1973 : Colorado School of Mines) Published Date: 1973 Source: Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines, p. 162-167 Series: Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines Description: During the last week in March and the first week in April, 1973, the Naval Underwater Systems Center measured the 76 Hz magnetic field strength (in Wi... File Type: [PDF - 249.63 KB] File Type: [PDF - 249.63 KB] Radio propagation measurements in coal mines at UHF and VLF [PDF - 346.24 KB] Personal Author: Goddard, Arthur E. Conference Authors: Thru-the-Earth-Electromagnetics Workshop (1973 : Colorado School of Mines) Published Date: 1973 Source: Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines, p. 54-61 Series: Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines Description: Radio propagation measurements were conducted in a coal mine at UHF (200 to 1000 MHz) and VLF (1 to 50 kHz) to characterize the transmission loss of i... File Type: [PDF - 346.24 KB] File Type: [PDF - 346.24 KB] Summary report of electromagnetic location techniques working group  [PDF - 288.74 KB] Personal Author: Farstad, Arnold J. Conference Authors: Thru-the-Earth-Electromagnetics Workshop (1973 : Colorado School of Mines) Published Date: 1973 Source: Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines, p. 171-177 Series: Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines Description: The Location Group conversed in the Petroleum Room of the Green Center with the purpose of addressing the following list of topics in light of the Bur... File Type: [PDF - 288.74 KB] File Type: [PDF - 288.74 KB] The electromagnetic response of a buried sphere for buried dipole excitation  [PDF - 186.51 KB] Personal Author: Hill, D. A. ; Wait, J. R. ; Conference Authors: Thru-the-Earth-Electromagnetics Workshop (1973 : Colorado School of Mines) Published Date: 1973 Source: Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines, p. 81-85 Series: Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines Description: The feasibility of locating a buried vertical magnetic dipole source (horizontal loop) from surface measurements of the vertical and horizontal magnet... File Type: [PDF - 186.51 KB] File Type: [PDF - 186.51 KB]

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