A Chinese company is testing the possibility of maintaining a helium balloon in a stable height more than 20 kilometers above ground, while remotely controlling its movements, according to experts at the test site in New Zealand's South Island on Saturday.
The helium balloon, named "Traveler", has a diameter of 30 meters and various equipment attached that can collect air and ground information from 20 to 100 kilometers above the ground.
"Our purpose is to achieve the long duration flight at a stable he
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