who invented the radiosonde

Looks like the Russians invented the first weather radiosonde. That's a good fact to have (it actually helped me in my research, because now I know where Vernov got the idea of building the first cosmic ray radiosonde a couple years later). As the radiosonde rises at about 300 meters/minute (about 1,000 feet/minute), sensors on the radiosonde transmit pressure, temperature, relative humidity and GPS position data each second. The first radiosonde was used in 1929. The Frenchman, Robert Bureau invented it. The radiosonde is attached to helium- or hydrogen-filled balloon, called variously a weather balloon or a sounding balloon, and the balloon lifts the radiosonde to altitudes exceeding 115,000 feet.

Vaisala's origins date back to the 1930s when Professor Vilho Väisälä, Vaisala's founder and long-time managing director, invented some of the operating principles of a radiosonde. Vaisala's origins date back to the 1930's when Professor Vilho Väisälä, Vaisala's founder and long-time managing director, invented the fundamental operating principles of a radiosonde and sent the first Finnish radiosonde aloft in December 1931.

The company was established in 1936 in Finland, and the first radiosondes were manufactured in the basement of a residential building in the center of Helsinki. Vaisala's origins date back to the 1930s when Professor Vilho Väisälä (1889–1969), Vaisala's founder and long-time managing director, invented some of the operating principles of a radiosonde [citation needed].He sent the first Finnish radiosonde aloft in December 1931. The Frenchman, Robert Bureau invented it. The radiosonde is a small, expendable instrument package (weighs 250 to 500 grams) that is suspended below a large balloon inflated with hydrogen or helium gas. "Radiosonde" is a balloon-borne instrument that transmits atmospheric data, usually temperature, pressure, and humidity, to a receiver-recorder on the ground. During the radiosonde’s ascent, it transmits data on temperature, pressure, and humidity to a sea-, air-, or land-based receiving station.

The first radiosonde was used in 1929.

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