NASAのインスタグラム(nasagoddard) - 8月27日 11時35分

The BARREL team prepares their fifth balloon and payload for launch. The white box in the foreground is an air traffic control transponder and positioning unit. The main payload (not visible in the picture) contains instruments to measure the number of electrons raining down from the swaths of trapped charged particles above Earth, known as the Van Allen Belts. The orange and white fabric is a parachute that will help the payload float gently to Earth after it is detached from the translucent balloon.
The NASA-funded BARREL – which stands for Balloon Array for Radiation-belt Relativistic Electron Losses – measures electrons in the atmosphere near the poles. For its third campaign, BARREL is launching six balloons from the Esrange Space Center in Kiruna, Sweden. BARREL is led by Dartmouth College in Hanover, New Hampshire.
Credit: NASA/Dartmouth/Alexa Halford #nasagoddard #ballon

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