페품 활용 우주 풍선 제작 촬영 방법 How to make a space balloon with recycled stuffs.

일단 큰 풍선을 구합니다. 헬륨이나 수소 40리터 이상이 필요합니다. 풍선 아래에는 낙하산이 있어야 하는데, 망가진 우산으로 만들어도 충분합니다. 우산은 튼튼한 실로 관측상자와 연결시킵니다. 관측상자는 가볍고 열을 잘 막는 스티로폼으로 만드는데, 낙하산과 연결부위가 부서져서 떨어지지 않도록 나무젓가락이나 철사로 강화를 해야합니다. 카메라는 가벼운 것을 쓰고 외장배터리와 GPS용 스마트폰도 될 수 있으면 가벼운 것을 넣습니다. 스마트폰 위치 추적 프로그램은 life360을 썼습니다. 관측상자는 성층권에서 영하 60도까지 온도가 내려가기 때문에 핫팩을 충분히 넣습니다. 제 관측상자는 500그램 정도 무게가 나갔지만 풍선은 1.5kg까지 들 수 있다고 합니다. 다른 사람들은 비싼 GPS도 넣는다는데 돈도 없고 작동도 잘 안되는 경우가 많아 저는 넣지 않았습니다. 상자 위쪽에는 밤에 찾기 쉽게 자전거용 LED 경고등을 달았습니다. 우니라라 위쪽 성층권에서는 바람이 서쪽에서 동쪽으로 불기 때문에 풍선은 서해안 쪽에서 날려야 찾을 수 있습니다. On 27 Nov 2012 noon, 12 years old boy Jieon released a big helium balloon to sky from his grandmother's yard at Asan, Korea. The bicycle camera which was hang by umbrella parachute and balloon took 4 hours clear HD video to near edge of space. The camera was landed at Pyounghae ri Uljin, which is 212km away from Asan to East. Jieon Choi is a 12 years old elementary school boy who is very curious about sky. He saw a news that several MIT students shoot a helium balloon to stratosphere to take pictures and thought that he could do the same thing. The one problem is the budget. So he saved his pocket money for 1 year and made $280. He draw a simple schematic and bought a used smart phone HTC nexus-one for $40 and very small, light bicycle HD camera RD-32 for $100. Then he made a observation box by using recycled styrofoam box to protect a camera, battery and phone for GPS tracking. Also he made a parachute by using a broken umbrella. He requested a big balloon from the National Weather Service and get one free for education purpose. His father support him 47l Helium gas. The balloon went up about 35km high and moved to East about 212km. The camera took a clear video of Korean peninsula, because the weather was clean and no clouds at the day. the balloon bursted about 2 hours later(14:00) and landed at Pyounghae-ri approximately 15:00. Jieon followed the GPS signal by using Life 360 app with his father. 5 hours later he arrived at Pyounghae-ri and searched 1 hour to find the observation box and found it. The box was in good condition and didn't break at all. Jieon was lucky to find the box because the box landed at construction site, near seashore and mountains. If the box was fallen to sea, he couldn't find it. Jieon said that "I thought that it can succeed. However when I saw the box was back in safe and the camera took great video from space, I couldn't believe my eyes. I hardly slept that day."