Radiosonde

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TYPE D’OBJET
audio-modulated/Navaid/Omega
DATE
1986
NUMÉRO DE L’ARTEFACT
2005.0043.001
FABRICANT
VIZ MFG. CO.
MODÈLE
LO-CATE Microsonde/ 1524-511 Omega
EMPLACEMENT
Philadelphia, Pennsylvania, United States of America

Plus d’information


Renseignements généraux

Nº de série
7D 1399
Nº de partie
1
Nombre total de parties
5
Ou
microsonde
Brevets
S/O
Description générale
styrofoam casing/ synthetic and metal parts

Dimensions

Remarque : Cette information reflète la taille générale pour l’entreposage et ne représente pas nécessairement les véritables dimensions de l’objet.

Longueur
26,2 cm
Largeur
16,8 cm
Hauteur
S/O
Épaisseur
9,8 cm
Poids
S/O
Diamètre
S/O
Volume
S/O

Lexique

Groupe
Météorologie
Catégorie
Mesure de vitesse et direction du vent en altitude
Sous-catégorie
S/O

Fabricant

Ou
VIZ
Pays
United States of America
État/province
Pennsylvania
Ville
Philadelphia

Contexte

Pays
Canada
État/province
Inconnu
Période
mid 1980's +
Canada
An example of a radiosonde of a type used by the Meteorological Service of Canada at its 31 upper air observing stations mostly across southern Canada. In the 1980's the (American) National Bureau of Standards types of radiosondes (such as 1987.0824, 1987.0826, 1991.0095, 1991.0100), which had been the main operational radiosonde in Canada for fifty years, began to disappear. Gradually starting in 1985 they were replaced by the Viz/Beukers Mark I/II (2004.0360, 2005.0043) and the Vaisala RS80 NAVAID radiosondes (2004.0358-0359, 2005.0041-0042) (Ref. 2). Part of a large collection of meteorological instruments acquired from the Meteorological Service of Canada (previously Atmospheric Environment Service) by the CSTM since 1967. MSC is the government agency responsible for collecting and disseminating meteorological data and forecasts in Canada. It was founded in 1871 in Toronto where it is still headquartered. The MSC was originally on the University of Toronto downtown campus but moved to Downsview in 1971 on land owned by UofT. The headquarters houses laboratories, research facilities and calibration and instrument maintenance facilities (now largely contracted out).
Fonction
A device lifted by balloon into the upper atmosphere to measure temperature, humidity, and air pressure and transmit the data to earth. Wind speed and direction can be determined by tracking the radiosonde.
Technique
A type of radiosonde which used signals from a system of navigational radio transmitters to determine the position of an ascending balloon (and thus wind velocity and direction), known as the Navaid method. A receiver in the sonde detected navigational signals which were sent to the ground station for positional determination from which the winds are calculated. This radiosonde is marked ‘Omega', indicating that it was used with the Omega navigation system. Omega was a global radio navigation system for aircraft, operated by the U.S. and six other nations. from 1971 to 1997 with eventually eight stations which transmitted VLF signals. Use of the Omega system declined during the 1990's due to the success of the Global Positioning System (GPS) which began operating in 1994, and it was shut down by the U.S. in 1997. The radiosonde ground station includes a UHF directional antenna to receive the 403 mHz signal from a distance of up to 200 km, a whip antenna with amplifier to monitor the Loran/VLF signals and a separate antenna to receive the GPS signals. These antennae are attached to a computer which receives and processes the radiosonde and navigational signals in real time. It converts the analogue PTU signal from the radiosonde into pressure, temperature, and relative humidity and calculates the winds from the navigational signals (Refs.1-3).
Notes sur la région
Inconnu

Détails

Marques
blue lettering on white and blue lettering on front reads 'VIZ-BEUKERS/ LOCATE (R) MICROSONDE (r)/ Model: 1524-511 OMEGA/ Serial Number: 7D 1399/ Produced by:/ VIZ Manufacturing Company/ Philadelphia. PA 19144-5782 USA/ Patents Pending'/ raised lettering on front reads 'LO-CATE/ MICROSONDE'/ black typed lettering on label on front reads 'CALIBRATION DATA/ THERMISTOR/ 13804/ HUMIDITY ELEMENT/ 10421/ BAROSWITCH 609-0699/ 02027-001-201'
Manque
appears complete
Fini
white casing/ white and green wire coverings/ white cord
Décoration
S/O

FAIRE RÉFÉRENCE À CET OBJET

Si vous souhaitez publier de l’information sur cet objet de collection, veuillez indiquer ce qui suit :

VIZ MFG. CO., Radiosonde, 1986, Numéro de l'artefact 2005.0043, Ingenium - Musées des sciences et de l'innovation du Canada, http://collection.ingeniumcanada.org/fr/id/2005.0043.001/

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