| a rocket equipped with instruments for making meteorological observations in the upper atmosphere. |

| sounding rocket n. A rocket used to make observations anywhere within the earth's atmosphere. |
sounding rocket
any unmanned rocket that is designed to probe atmospheric conditions and structure at heights (80-160 km [50-100 miles]) beyond the reach of airplanes and balloons but impractical to explore by means of artificial satellites. A sounding rocket usually has a vertical trajectory as it travels through the upper atmosphere carrying a payload of scientific instruments
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