TERMIUM Plus^®

Fiche 1,  Justifications,  Anglais

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The local survey grid, presum­ably based on the Hatt Azimuthal Equidistant projection, has its origin at the East End of the Tabou baseline where X=50, 000 m and Y=50, 000 m and the Y axis is defined as being parallel to the meridian.  3, fiche 1, Anglais, - Hatt%20Azimuthal%20Equidistant%20projection

Fiche 1,  Justifications,  Français

Record number: 1, Textual support number: 1 OBS

Lorsque les distances à partir d'un point donné sont conservées, il s'agit de projection équidistante.  3, fiche 1, Français, - projection%20azimutale%20de%20Hatt

Fiche 1,  Justifications,  Espagnol

Fiche 2,  Justifications,  Anglais

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The angular measure of the distance of an object from the local meridian.  4, fiche 2, Anglais, - hour%20angle

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The hour angle of a celestial body is the time elapsed since its upper transit. It is the angle between the observer’s (astronomic) meridian and the declination circle of the body, measured positive westward from the meridian.  5, fiche 2, Anglais, - hour%20angle

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clock angle: term officialized by the Aeronautical Term Standardization Committee (ATSC) - Helicopters.  6, fiche 2, Anglais, - hour%20angle

Fiche 2,  Justifications,  Français

Record number: 2, Textual support number: 1 DEF

Angle dièdre formé par un cercle horaire et le plan méridien du lieu [...] compté de 0 à 24 heures à partir du passage supérieur de l'astre au méridien du lieu [...]  3, fiche 2, Français, - angle%20horaire

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Mouvement apparent du soleil sur la voute céleste. Il varie de 15° par heure. On prend 12h00 comme le moment où l'angle est égal à 0°.  4, fiche 2, Français, - angle%20horaire

Record number: 2, Textual support number: 1 CONT

[...] l'angle horaire de 13h00 est +15°.  4, fiche 2, Français, - angle%20horaire

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angle horaire : terme uniformisé par le Comité d'uniformisation de la terminologie aéronautique (CUTA) - Hélicoptère.  5, fiche 2, Français, - angle%20horaire

Fiche 2,  Justifications,  Espagnol

Fiche 3,  Justifications,  Anglais

Record number: 3, Textual support number: 1 OBS

The Dominion Observatory was founded for very pragmatic reasons. The objective was to have a longitude reference(with associated time signal) for surveying in Canada :"To open up the West". Surveyors in the field would compare the time signal of the Dominion Observatory with their local time determined by astronomical observations-the difference corresponding to longitude difference between Canada's prime meridian(Dominion Observatory) and their location. Construction of the building began in July 1902 was completed in 1905.  2, fiche 3, Anglais, - Dominion%20Observatory

Record number: 3, Textual support number: 2 OBS

The Dominion Observatory was an astronomical observatory in Ottawa, Canada that operated from 1905 to 1970. The Observatory was also an institution within the Canadian Federal Government. The observatory grew out of the Department of the Interior’s need for the precise coordinates and timekeeping that at that time could only come from an observatory. For several years they had used a small observatory on the Ottawa River for this purpose. In 1902 it was decided that Canada needed a larger national observatory similar to the Royal Greenwich Observatory in Britain. The new building was thus erected near Dow’s Lake on the Agriculture Department’s Central Experimental Farm land. This building was completed in 1905. Its main instrument was a 15 inch refracting telescope, the largest refracting telescope ever installed in Canada. While the building and institution were primarily dedicated to astronomical timekeeping in support of surveying, a number of other activities took place here. The Dominion Observatory was Canada’s leading institution in Geophysics for many decades, which included the operation of Canada’s national seismometer network. The facility did important work but with this bridgehead into the world of astronomy and the growth of the field of astrophysics Canadian astronomers quickly demanded a facility designed for the new scientific age.  3, fiche 3, Anglais, - Dominion%20Observatory

Fiche 3,  Justifications,  Français

Record number: 3, Textual support number: 1 OBS

L'Observatoire fédéral fut fondé pour des raisons très pragmatiques. L'objectif était d'obtenir une référence de longitude (comprenant le signal horaire associé) pour l'arpentage au Canada : «Pour coloniser l'Ouest». Les arpenteurs sur le terrain devaient comparer le signal horaire de l'Observatoire fédéral avec l'heure locale où ils se trouvaient, déterminée par des observations astronomiques, soit la différence correspondant à l'écart de longitude entre le méridien origine au Canada (l'Observatoire fédéral) et leur emplacement. La construction de l'édifice débuta en juillet 1902 et fut achevée en 1905.  1, fiche 3, Français, - Observatoire%20f%C3%A9d%C3%A9ral

Fiche 3,  Justifications,  Espagnol

Fiche 4,  Justifications,  Anglais

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An equatorial system of curvilinear celestial coordinates which has the Equator and the local meridian as primary and secondary reference planes, respectively. The position of a celestial body is given by its hour angle and declination.  2, fiche 4, Anglais, - hour%20angle%20system%20of%20coordinates

Fiche 4,  Justifications,  Français

Fiche 4,  Justifications,  Espagnol

Fiche 5,  Justifications,  Anglais

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The meridian through any particular place or observer, serving as the reference for local time.  1, fiche 5, Anglais, - local%20meridian

Fiche 5,  Justifications,  Français

Fiche 5,  Justifications,  Espagnol