Radiosonde
notes: label: Description
content: The U.S. Weather Bureau, which transferred this radiosonde to the Smithsonian, described it as an experimental model for high altitude weather observations, made ca. 1942. A label on the pressed paper container reads "SIMMONDS CHRONOMETRIC RADIOSONDE. . . SIMMONDS AEROCESSARIES, INC., NEW YORK” and “P.B. I21." Inside is a blocking oscillator, an FM transmitter, and a clock-driven switch. Sensors for measuring temperature (bimetallic), pressure (aneroid), and humidity (hair hydrometer) are attached. Simmonds Aeroccessories, Inc. may have been a British firm with an American office.
label: Description
content: Ref: “New Weather Aid Now Perfected,” American Aviation 6 (1942): 35.
label: Location
content: Currently not on view
setName: label: See more items in
content: Medicine and Science: Physical Sciences
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: PH.322308
label: catalog number
content: 322308
label: accession number
content: 247582
objectType: label: Object Name
content: Radiosonde
physicalDescription: label: Measurements
content: overall: 11 in x 7 in x 6 5/8 in; 27.94 cm x 17.78 cm x 16.8275 cm