sounding balloon

Previous experiments on cosmic rays have been made on mountain tops or with sounding balloons.

In this treatise, Goddard detailed his search for methods of raising weather recording instruments higher than sounding balloons.

During 1893 French scientist Jules Richard constructed sounding balloons.

Climatic data taken from simultaneously released unmanned sounding balloons agreed with the information gathered from the Berson/Süring ascent.

The project's 50 scientists, most of them Americans, are gathering data with the help of the icebound icebreaker, an escort icebreaker and two auxiliary vessels, as well as research aircraft and sounding balloons.

A weather or sounding balloon is a balloon (specifically a type of high altitude balloon) which carries instruments in the sky to send back information on atmospheric pressure, temperature, and humidity by means of a small measuring tool called a radiosonde.

Unlike radiosonde balloons which collect vertical atmospheric sounding data over the release point during a relatively short ascent lasting a few hours, horizontal sounding balloons stay aloft for much longer periods lasting several weeks or months, floating at a constant-density altitude.

In the air, sensors mounted on towers and in aircraft and suspended from sounding balloons equipped with Global Positioning System receivers record changes in wind direction, velocity, humidity and other conditions at all altitudes, while satellites passing above Sheba generate still more information.