- Equipment, tools, and parts:
- Through-the-earth communications systems
Results 1 - 10 of 41
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5/9/2019 - Training materialsThis tutorial provides an advanced discussion of the available CT technologies, operating characteristics and general system performance considerations with descriptions of specific uses for primary and secondary communications.
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2/6/2013 - Training materialsThis tutorial provides a brief overview of CT systems intended to meet the needs of people who require a basic understanding of the distinguishing features and operations of different CT systems.
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5/9/2019 - Training materialsSection 2 of the OMSHR advanced tutorial on wireless communication and electronic tracking covering communication system performance.
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4/8/2019 - Contracts and cooperative agreementsA contract to improve the performance of TTE radio systems intended for use in coal mine emergency communications between the mine and the surface.
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9/1/2017 - Peer reviewed journal articlesA paper presenting the simulation and measurement results of recent NIOSH research aimed at investigating current injection at extremely low-frequency, and in particular, ground contact impedance.
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6/1/2017A study using a mathematical model of subsurface electric fields and a prototype electrode-based TTE system to characterize the factors that will affect electric field distribution.
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11/22/2016 - Interagency agreementsAn interagency agreement to improve signal-to-noise in TTE receivers. The aim is to use existing transmitters that are not "intrinsically safe" to provide a reference signal from underground.
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7/19/2016 - Contracts and cooperative agreementsA contract to fabricate and test through-the-earth communication devices in an underground mine.
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7/19/2016 - Contracts and cooperative agreementsA contract to develop and demo a two-way, through-the-earth communication system for mines that applies state-of-the-art communications technologies to overcome subterranean wireless communication challenges while meeting industrial safety standards.
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7/19/2016 - Contracts and cooperative agreementsA contract to enhance key features of the through-the-earth prototype previously developed to improve its usability, investigate design changes to comply with mine safety standards, ruggedize the hardware, and demonstrate performance at coal mine sites.