BACKGROUND Research into the application of gun-launched vertical probesi as atmospheric sounding device vehicles has been conducted during recent years, and the status of such systems has progressed to an encouraging level. The gun probe high-altitude sounding system appears suitable as a routinely operational meteorological device. Wind sensing payloads, i.e., chaff, parachutes and spheres, have been successfully utilized in the smaller gun-launched ystems , and chemical pay-,loads as high-altitude wind sensors have been flown in larger systems 4. Tele-metry5,6 units have been developed and successfully flown. Environmental temperature measurements with gun-launched sensors are forthcoming.
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