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Fiche 1,  Justifications,  Anglais

Record number: 1, Textual support number: 1 DEF

A board upon which the horizontal trajectory of a pilot-balloon is plotted and the wind speeds and directions determined.  2, fiche 1, Anglais, - pilot%20balloon%20plotting%20board

Record number: 1, Textual support number: 1 OBS

Pilot Balloon - Meteorological Plotting Board. Observations of a pilot balloon ascent, made by a theodolite are solved for wind speed and direction by graphical means using a plotting board. This method was used in the United States military and civilian weather services until the wide spread adoption of computer programs for solving the sightings. This board is used with a standard slide rule as opposed to the U.K. Met. Office Pilot Balloon Slide Rule.  3, fiche 1, Anglais, - pilot%20balloon%20plotting%20board

Fiche 1,  Justifications,  Français

Record number: 1, Textual support number: 1 DEF

Graphique sur lequel on reporte la trajectoire horizontale d’un ballon-pilote et on détermine les directions et les vitesses du vent.  2, fiche 1, Français, - graphique%20de%20d%C3%A9pouillement

Fiche 1,  Justifications,  Espagnol

Fiche 2,  Justifications,  Anglais

Record number: 2, Textual support number: 1 DEF

a project or scheme tentatively announced in order to test public opinion.  1, fiche 2, Anglais, - trial%20balloon

Record number: 2, Textual support number: 2 DEF

an experiment to see how a planned policy or program etc. will be received by the public.  2, fiche 2, Anglais, - trial%20balloon

Fiche 2,  Justifications,  Français

Record number: 2, Textual support number: 1 DEF

Expérience que l’on tente pour sonder les dispositions des gens, tâter l’opinion.  1, fiche 2, Français, - ballon%20d%26rsquo%3Bessai

Record number: 2, Textual support number: 2 DEF

Idée que lance dans le public un écrivain, un politicien, pour pressentir l’accueil qui pourra être fait à quelque œuvre plus considérable sur la même matière.  2, fiche 2, Français, - ballon%20d%26rsquo%3Bessai

Fiche 2,  Justifications,  Espagnol

Fiche 3,  Justifications,  Anglais

Record number: 3, Textual support number: 1 CONT

Balloon. Shall be reported when the height of the base of a layer aloft or vertical visibility into a surface based layer is determined by observation of a ceiling balloon, pilot balloon or aerological balloon, and the height is computed from the assumed rate of ascent and the time interval between the release of the balloon and its entry into the base of the layer or disappears into a surface based layer.  1, fiche 3, Anglais, - aerological%20balloon

Fiche 3,  Justifications,  Français

Record number: 3, Textual support number: 1 CONT

Ballon. Il faut utiliser «ballon» quand la hauteur de la base d’une couche en altitude, ou la visibilité verticale dans une couche dont la base est à la surface, est déterminée en observant un ballon de mesure du plafond, un ballon-pilote ou un ballon aérologique. La hauteur de la couche est calculée d’après la vitesse ascensionnelle présumée du ballon et le temps écoulé entre le moment où le ballon a été lâché et celui où il est entré dans la base de la couche ou disparaît dans une couche dont la base est à la surface.  1, fiche 3, Français, - ballon%20a%C3%A9rologique

Fiche 3,  Justifications,  Espagnol

Fiche 4,  Justifications,  Anglais

Record number: 4, Textual support number: 1 DEF

Special slide-rule used for calculating upper-air winds from pilot-balloon observations.  3, fiche 4, Anglais, - pilot%2Dballoon%20slide%20rule

Record number: 4, Textual support number: 1 CONT

Pilot Balloon slide rules ... were used by meteorologists in the weather services and military units of the United Kingdom to determine the upper wind velocities from an ascending hydrogen or helium filled Pilot Balloon ... The position of the Pilot Balloon is tracked by means of one or two theodolites at one minute intervals. The Pilot Balloon slide rule is used to convert the observed azimuth and elevation readings into wind velocity and direction records. The use of slide rules and plotting boards was abandoned with the wide spread adoption of computers and programs to do the calculations, as well as the decline in the use of optical pilot balloon theodolites.  2, fiche 4, Anglais, - pilot%2Dballoon%20slide%20rule

Fiche 4,  Justifications,  Français

Record number: 4, Textual support number: 1 DEF

Règle à calcul spéciale utilisée pour le calcul des vents en altitude à partir d’observations de ballon-pilote.  1, fiche 4, Français, - r%C3%A8gle%20%C3%A0%20calcul%20pour%20ballon%2Dpilote

Fiche 4,  Justifications,  Espagnol

Fiche 5,  Justifications,  Anglais

Record number: 5, Textual support number: 1 DEF

Free balloon whose path while moving upwards is visually observed in order to measure upper winds.  3, fiche 5, Anglais, - pilot%20balloon

Record number: 5, Textual support number: 1 CONT

One expedient method for determining the winds aloft entails the launching and tracking of a pilot balloon, also known as a pibal. The name for these balloons that do not carry instruments apparently came from their use during the 19th century when they were launched prior to manned balloon ascents to help guide or "pilot" the manned balloons. The brightly colored helium filled balloon rises at a known ascent rate. However, the balloon is carried horizontally with the wind. Since the assumption is made that the balloon serves as a tracer of the wind, the horizontal motion of the balloon over measured time intervals can be used to determine the wind speed. An observer visually tracks the motion of the balloon with an instrument called a theodolite and records the elevation and azimuth angles at timed intervals. The sequence of observed elevation and azimuth information are plotted on a plotting board to obtain the balloon motion. The wind speed and direction at each selected level are determined. Wind observations may be limited by low cloud ceilings that obscure the balloon.  2, fiche 5, Anglais, - pilot%20balloon

Record number: 5, Textual support number: 1 OBS

pilot balloon: term standardized by ISO.  4, fiche 5, Anglais, - pilot%20balloon

Fiche 5,  Justifications,  Français

Record number: 5, Textual support number: 1 DEF

Ballon de petit diamètre, dont la trajectoire, observée depuis le sol à l’aide d’un théodolite ou d’un radar, indique la vitesse du vent et sa direction.  3, fiche 5, Français, - ballon%2Dpilote

Record number: 5, Textual support number: 1 OBS

ballon pilote : terme normalisé par l'ISO.  4, fiche 5, Français, - ballon%2Dpilote

Fiche 5,  Justifications,  Espagnol

Record number: 5, Textual support number: 1 DEF

Globo libre cuya trayectoria ascendente se observa visualmente para determinar los vientos en altitud.  2, fiche 5, Espagnol, - globo%20piloto

Fiche 6,  Justifications,  Anglais

Record number: 6, Textual support number: 1 DEF

Measurement of upper winds by the optical tracking of a pilot balloon.  5, fiche 6, Anglais, - pilot%2Dballoon%20observation

Record number: 6, Textual support number: 1 OBS

pilot balloon observations: term standardized by ISO.  6, fiche 6, Anglais, - pilot%2Dballoon%20observation

Fiche 6,  Justifications,  Français

Record number: 6, Textual support number: 1 DEF

Mesure des vents en altitude au moyen d’un ballon-pilote et d’un dispositif optique de poursuite.  4, fiche 6, Français, - observation%20par%20ballon%20pilote

Record number: 6, Textual support number: 1 OBS

observations par ballon pilote : terme normalisé par l'ISO.  5, fiche 6, Français, - observation%20par%20ballon%20pilote

Fiche 6,  Justifications,  Espagnol

Record number: 6, Textual support number: 1 DEF

Medición de los vientos en altitud siguiendo la trayectoria de un globo con un dispositivo óptico.  1, fiche 6, Espagnol, - observaci%C3%B3n%20con%20globo%20piloto

Fiche 7,  Justifications,  Anglais

Record number: 7, Textual support number: 1 DEF

Station at which upper winds are measured by the optical tracking of a pilot balloon.  3, fiche 7, Anglais, - pilot%2Dballoon%20station

Fiche 7,  Justifications,  Français

Record number: 7, Textual support number: 1 DEF

Station à laquelle on mesure les vents en altitude par un procédé optique de poursuite d’un ballon-pilote.  3, fiche 7, Français, - station%20d%26rsquo%3Bobservation%20par%20ballon%2Dpilote

Fiche 7,  Justifications,  Espagnol

Record number: 7, Textual support number: 1 DEF

Estación en la que se determinan los vientos en altitud siguiendo, con la ayuda de un dispositivo óptico, la trayectoria de un globo piloto.  1, fiche 7, Espagnol, - estaci%C3%B3n%20de%20globo%20piloto