- Equipment, tools, and parts:
- Radios
Results 1 - 10 of 32
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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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3/1/1975 - Peer reviewed journal articlesThe theoretical study of UHF radio communication in coal mines, with particular reference to the rate of loss of signal strength along a tunnel, and from one tunnel to another around a corner is the concern of this paper. This work was part of an invest...
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2/24/2023 - Contracts and cooperative agreementsA contract to investigate techniques to increase the survivability of leaky feeder communication systems.
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10/4/2019 - Peer reviewed journal articlesThis paper reports the influence of antennas on radio signal propagation in tunnels and underground mines.
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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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3/5/2019 - Peer reviewed journal articlesAn article presenting the selection, configuration and testing methodologies employed by NIOSH researchers to integrate commercially available land mobile data radios into an existing leaky feeder communication system to provide IP data transport.
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5/1/2017 - Peer reviewed journal articlesAn article that discusses how wall roughness affects radio propagation in tunnels, and presents a unified ray tracing and modal method for modeling radio propagation in tunnels with rough walls.
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3/13/2017 - Research projectsA project to enhance the understanding of underground mining communication and tracking system performance through the development and validation of radio signal propagation models.
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7/19/2016 - Contracts and cooperative agreementsA contract to ensure that the limited useful spectrum is used efficiently, health and safety hazards are not introduced, and new systems do not interfere with each other or with older systems already in place.
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7/19/2016 - Contracts and cooperative agreementsA contract to modify medium frequency radio systems to improve refuge chamber situational awareness in an underground coal mine.