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15 results for "cave radio"
Cave Radiolocation By David Gibson
eBook (PDF): $7.82
This book is a collection of essays on radiolocation in caves, and related topics. Most of the articles have previously been published in the journal of the Cave Radio and Electronics Group, a... More > special interest group of the British Cave Research Association. The topic is approached from a theoretical point-of-view, studying the mechanism of propagation of the fields, and how their measurement can be used to provide a location tool for use in cave surveying. In addition, other peripheral topics are covered, such as channel sounding, electronic measurement of clinometer angle and the copyright of cave surveys.< Less
Cave Radiolocation By David Gibson
Paperback: $19.49
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This book is a collection of essays on radiolocation in caves, and related topics. Most of the articles have previously been published in the journal of the Cave Radio and Electronics Group, a... More > special interest group of the British Cave Research Association. The topic is approached from a theoretical point-of-view, studying the mechanism of propagation of the fields, and how their measurement can be used to provide a location tool for use in cave surveying. In addition, other peripheral topics are covered, such as channel sounding, electronic measurement of clinometer angle and the copyright of cave surveys.< Less
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CREG Journal Archive: 15 to 25 By Mike Bedford (editor) & David Gibson (technical editor)
Paperback: List Price: $49.18 $24.59 | You Save: 50%
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This publication is a facsimile reproduction of issues 15 to 25 of the journals of the Cave Radio & Electronics Group (CREG), which were originally issued between March 1994 and September 1996 as... More > ISSN 1361-4800. CREG is a UK-based special interest group of the British Cave Research Association and is probably the world's leading organisation of its kind. Its aims are to encourage the development and use of radio communication and other electronic and computer equipment in caving and related activities. The Group was established in 1987 and, in 2011, celebrated its 25th year and its 75th published journal. Its followers include cavers, radio amateurs, electronic engineers and professional & industrial organisations. The British Cave Research Association (bcra.org.uk) is a registered charity, and a constituent body of the British Caving Association, undertaking charitable activities on behalf of BCA.< Less
CREG Journal Archive: 1 to 14 By Mike Bedford (editor) & David Gibson (technical editor)
Paperback: List Price: $49.16 $24.58 | You Save: 50%
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This publication is a facsimile reproduction of issues 1 to 14 of the journals of the Cave Radio & Electronics Group (CREG), which were originally issued between Autumn 1988 and December 1993 as... More > ISSN 1361-4800. CREG is a UK-based special interest group of the British Cave Research Association and is probably the world's leading organisation of its kind. Its aims are to encourage the development and use of radio communication and other electronic and computer equipment in caving and related activities. The Group was established in 1987 and, in 2011, celebrated its 25th year and its 75th published journal. Its followers include cavers, radio amateurs, electronic engineers and professional & industrial organisations. The British Cave Research Association (bcra.org.uk) is a registered charity, and a constituent body of the British Caving Association, undertaking charitable activities on behalf of BCA.< Less
BCRA Review 2016 By David Lowe (editor)
Paperback: $13.12
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The British Cave Research Association is a UK registered charity (267828). This is its annual report for the year 2016. For further information about this publication, please see bcra.org.uk/news.... More > This publication includes the annual return to the Charity Commission as well as reports on BCRA symposiums and meetings, and the following items… * Reports from BCRA Officers (Chairman, Secretary, IT and Web, Treasurer, Library Co-ordinator, Foreign Secretary, Conservation Officer), * Reports on BCRA publications (Cave and Karst Science, CREG Journal, Cave Studies Series, Caves and Karst of the Yorkshire Dales) * Reports from BCRA Special Interest Groups (Cave Archaeology Group (CAG), Cave Surveying Group (CSG), Explosives Users Group (EUG), Cave Radio And Electronics Group (CREG)) * BCRA Grants And Awards (BCRA's Annual Awards, Cave Science and Technology Research Fund (CSTRF), Ghar Parau Foundation (GPF), UK Cave Conservation Emergency Fund (UKCCEF))< Less
BCRA Review 2015 (monochrome version) By David Lowe (Editor)
Paperback: $4.56
Prints in 3-5 business days
The British Cave Research Association is a UK registered charity (267828). This is its annual report for the year 2015. For further information about this publication, please see bcra.org.uk/news.... More > This publication includes the annual return to the Charity Commission as well as reports on BCRA symposiums and meetings, and the following items… * Reports from BCRA Officers (Chairman, Secretary, IT and Web, Treasurer, Library Co-ordinator, Foreign Secretary, Conservation Officer), * Reports on BCRA publications (Cave and Karst Science, CREG Journal, Speleology, Cave Studies Series, Caves and Karst of the Yorkshire Dales) * Reports from BCRA Special Interest Groups (Biology, Cave Archaeology Group (CAG), Cave Surveying Group (CSG), Explosives Users Group (EUG), Cave Radio And Electronics Group (CREG)) * BCRA Grants And Awards (Honorary Life Membership, BCRA's Annual Awards, Cave Science and Technology Research Fund (CSTRF), Ghar Parau Foundation (GPF), UK Cave Conservation Emergency Fund (UKCCEF))< Less
BCRA Review 2015 By David Lowe (Editor)
Paperback: $13.12
Prints in 3-5 business days
The British Cave Research Association is a UK registered charity (267828). This is its annual report for the year 2015. For further information about this publication, please see bcra.org.uk/news.... More > This publication includes the annual return to the Charity Commission as well as reports on BCRA symposiums and meetings, and the following items… * Reports from BCRA Officers (Chairman, Secretary, IT and Web, Treasurer, Library Co-ordinator, Foreign Secretary, Conservation Officer), * Reports on BCRA publications (Cave and Karst Science, CREG Journal, Speleology, Cave Studies Series, Caves and Karst of the Yorkshire Dales) * Reports from BCRA Special Interest Groups (Biology, Cave Archaeology Group (CAG), Cave Surveying Group (CSG), Explosives Users Group (EUG), Cave Radio And Electronics Group (CREG)) * BCRA Grants And Awards (Honorary Life Membership, BCRA's Annual Awards, Cave Science and Technology Research Fund (CSTRF), Ghar Parau Foundation (GPF), UK Cave Conservation Emergency Fund (UKCCEF))< Less
Mojito By J. Bell
Paperback: $8.00
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California Institute of Technology professor John Fulton, Ph.D., and Hector are sent to Puerto Rico to rescue the world’s largest radio telescope from suspected galactic graffiti. The world has... More > long wondered about extraterrestrial life. The Arecibo Radio Telescope, among others, was designed to listen to the universe. Suddenly “normal” galactic noise is interrupted and the ear becomes hard of hearing. Dr. Fulton is sent to investigate. An underground cave is discovered under the radio telescope and local Indian descendants lead Hector to a private peyote party in the cave which leads Hector to a new psychic dimension and the answer to intergalactic communication.< Less
Channel Characterisation and System Design for Sub-Surface Communications By David Gibson
eBook (PDF): $54.62
Based on the author's PhD thesis, this book is a theoretical study of subterranean radio communication, with the focus on methods that depend primarily on the penetration of electromagnetic fields... More > through the ground. Through-the-earth communication using e-m fields - specifically magnetic induction - plays a role in search and rescue systems used in the mining industry. It is also used for borehole telemetry, pipeline location and by cavers and pot-holers. Chapters describe propagation, antennas, and the design of transmitters and receivers. A figure of merit - the specific aperture - is introduced as an aid to antenna design. A crucial aspect of all systems is the signal to noise ratio, for which the strategy of noise-matching is introduced. The design of a wide-band low-frequency sounder is described, for channel evaluation using a non-ideal binary sequence. A method of calculating the inverse of a generalised sequence is described, for which cross-correlation results in a system identification signal.< Less

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