Air Navigation Systems Chapter 4. Hyperbolic Airborne Radio Navigation Aids – A Navigator's View of their History and Development

Blanchard, Walter

doi:10.1017/s0373463300010092

Cited by 9 publications

(3 citation statements)

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“…The remaining clock deviations can be mitigated by utilizing the travel time differences from three source to determine the position hyperbolically. One can then retroactively determine the clock correction needed to obtain the right travel time [9].…”

Section: The Fish Tagmentioning

confidence: 99%

An Acoustic Archival Tag for Long-Range Tracking Of Small Fishes

Fischer¹

2018

OFOAJ

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Section: The Fish Tagmentioning

confidence: 99%

An Acoustic Archival Tag for Long-Range Tracking Of Small Fishes

Fischer¹

2018

OFOAJ

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“…Wally Blanchard tells us that up until 1942, less than five percent of the RAF's bombs landed within five miles of the target. 6 The solution, as we now know, lay in the use of radio -not just radio, but that mixture of radio, signal processing, and precise measurement that we now call electronic navigation. From Germany came mostly beam techniques -Lorentz, Knickebein, Consol and others.…”

Section: Norman Dahlmentioning

confidence: 99%

Presidential Address. Navigation: A Changing Trade

Dahl¹

1992

J. Navigation

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As the title indicates, this paper is principally concerned with navigation as a profession, rather than the essential activity of finding the way there and back again that is continually practised by the whole of humankind. By a profession, I mean the acquisition of a set of defined skills through training and the exercising of those skills as a way of earning a living for most, if not all, of a working lifetime. And looking at the profession of navigation, two interesting facts emerge; one is that it is not a particularly old profession - a century and a half, maybe. The second is that it is not likely to get very much older, at least in the form we know it today.

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“…The second approach, which is often used in RAFOS, uses travel time differences from three sound sources to determine position hyperbolically. Knowing position, one can then retroactively determine the clock correction needed to obtain the right travel times (Blanchard, 1991).…”

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confidence: 99%

A Miniature Acoustic Device for Tracking Small Marine Animals or Submerged Drifters

Fischer

Rossby

Moonan

2017

Journal of Atmospheric and Oceanic Technology

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This paper presents an acoustic archival tag capable of tracking small marine animals. It is also a technology that can be ported to other platforms such as next generation acoustic and Argo floats as well as gliders. Tracking is achieved by standard RAFOS triangulation using the arrival times of unique sound signals emitted by moored sources. At the core of the tag is a custom microchip, which controls all system operations. It incorporates the critical acoustic arrival time detector, a thermal sensor and a pressure sensor interface. All electronic components are housed inside a cylindrical hydrophone of 25.4 mm length and 10.7 mm diameter. The collected data is archived in nonvolatile memory chips with a total capacity of 4 Mb, sufficient storage to record position, temperature and pressure on an hourly basis for two years. The tag consumes 4-5 W in standby mode and between 60-90 W while the sound arrival time detector is in operation. The power is provided by two button cell silver-oxide batteries, which enable an active tag lifetime of approximately two years.

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Air Navigation Systems Chapter 4. Hyperbolic Airborne Radio Navigation Aids – A Navigator's View of their History and Development

Abstract: This paper is the fourth chapter of a series on Air Navigation Systems during theperiod from the early oceanic flights and the inception of commercial aviation to the introduction of INS in civil aircraft. Comments on the content of the paper would be welcomed by the author and the editor.

Cited by 9 publications

References 11 publications

An Acoustic Archival Tag for Long-Range Tracking Of Small Fishes

An Acoustic Archival Tag for Long-Range Tracking Of Small Fishes

Presidential Address. Navigation: A Changing Trade

A Miniature Acoustic Device for Tracking Small Marine Animals or Submerged Drifters

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