Mining Publication: Preliminary Performance Predictions For Electromagnetic Through-The-Earth Mine Communications: A Collection of Working Memoranda
Original creation date: March 1972
This report comprises three working memoranda that present preliminary performance estimates for baseband voice and narrowband through-the-earth electromagnetic communications systems of principal interest to the Bureau of Mines for operational/emergency mine communications. The calculations were prepared to obtain early indications of the feasibility and governing parameters of such communications systems. They are based on limited but pertinent coal mine electromagnetic noise data acquired to date by Bureau contractors and on theoretical signal-attenuation characteristics for two transmitter antenna types of interest to the Bureau.
Authors: Arthur D. Little, Inc.
- Advanced Tutorial on Wireless Communication and Electronic Tracking: Introduction
- Earth Conductivity Estimation from Through-the-Earth Measurements of 94 Coal Mines Using Different Electromagnetic Models
- Field Test of a Post-Disaster Communication System
- Low-Frequency Electromagnetic Noise Cancelling Antenna System
- Magnetic Communication System (MCS)
- Optically Powered Remote Gas Monitor
- Propagation of EM Signals in Underground Mines
- Simulation and Measurement of Through-the-Earth, Extremely Low-Frequency Signals Using Copper-Clad Steel Ground Rods
- Through-the-Earth (TTE) Communications: Range Reliability Improvements
- Two-Way, Through-the-Earth Emergency Communication System for Trapped Miners and the Surface