A Piece of History: The Canadian Chronometric Radiosonde
– By Kenneth A. Devine –
While temperature profiles to the tropopause had been conducted in Canada for research purposes starting in 1911 (Devine & Strong, 2009), operational upper air systems did not become available until 1929 with the introduction of the radiosonde which had a built in radio transmitter. The radiosonde gave the meteorologist a three dimensional view in real time