Renseignements généraux

Nº de série

S/O

Nº de partie

1

Nombre total de parties

1

Ou

S/O

Brevets

S/O

Description générale

metal casing, support, parts/ synthetic antenna and cord covering

Dimensions

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

Longueur

115,0 cm

Largeur

108,0 cm

Hauteur

231,0 cm

Épaisseur

S/O

Poids

S/O

Diamètre

S/O

Volume

S/O

Lexique

Groupe

Météorologie

Catégorie

Mesure de montant, taux et durée de précipitation

Sous-catégorie

S/O

Fabricant

Ou

Environment CA

Pays

Canada

État/province

Inconnu

Ville

Inconnu

Contexte

Pays

Canada

État/province

Ontario

Période

late 1970's - early 1980's; this instrument was apparently in use for 25 years (Ref. 3).

Canada

A prototype instrument designed, built and used by the Meteorological Service of Canada to gather precipitation data. 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

An instrument used to detect the presence of precipitation and determine its type and rate of descent

Technique

An early version of a precipitation occurrence sensor (POSS), a prototype designed and built by AES. This instrument was built by John Cook at the AES Instrument Branch in about 1977 and contains a Philips intrusion alarm. Kenneth Wu added the clear plastic dielectric antenna to improve it's sensitivity. Later a hand held Doppler police was used leading, with assistance from the University of Toronto, to the present bistatic Doppler radar called POSS sold by Andrew. All of these systems use a 10 gHz Gunn diode to generate the radar pulse which is mixed with the Doppler shifted return signal to produce an audio frequency output signal. Snow which falls at 2 m/s and rain which falls at 6 m/s can be easily distinguished aurally. These systems are very sensitive for the detection of precipitation (Ref. 1)

Notes sur la région

Inconnu

Détails

Marques

none

Manque

unknown

Fini

metallic grey casing and support, colourless transparent antenna/ black cord covering

Décoration

S/O