A rocket-borne instrument for measurement and transmission of upper-air meteorological data in the lower 76,000 meters (250,000 feet) of the atmosphere, especially that portion inaccessible to radiosonde techniques.

meteorological instrument package that measures vertical profiles of atmospheric winds and either temperature or density upon descent after ejection from a rocket at or near apogee. Rocketsondes reach altitudes above those typical for balloon-borne radiosondes.

An instrument package carried aloft by a meteorological rocket to make a measure one or more weather elements in a sounding of the upper atmosphere, at altitudes usually higher than can be obtained by radiosonde or aircraft.

rock·et·sonde