Space Balloon – 999 Project Michio Inoue Space Online School 02/05/2011

Galaxy Express 999 Leiji Matsumoto

 Have you dreamed of going and doing something in space? – To spacewalk? – To see Earth from outside? – Do something fun? How can we get there? Our project goal is to send a unmanned spaceship to space, build a small platform to do various activites, and broadcast them Sending people may be costly, but

Earth Orbiting Satellites  Geo-stationary orbit: 36,000km (22,000mi)  ISS: km ( mi)  GPS: 20,200km (12,550mi)  very expensive!

Gateway to Space  SpaceShipOne: 100km – Official “edge of space” – First commercial vehicle to go to “space” – $200,000/person  Balloon: 32km (20mi) – What our focus today – Reachable with <$1000  Airplanes: 10km (6mi)

Space Balloons  Becoming popular after 2006  Done by students and hobbyists – CU Spaceflight (Cambridge University) – SABLE (Canada) – MIT undergrads – Students in Spain – etc. etc.

1,100 ft. 185min 69,700 ft. 148min. Descent with parachute Launch t=0min.  Canadian group (SABLE)  August ,700 ft 6min. 22,900 ft 117,597 ft (max) 140min. Photo: Nikon Coolpix P2 30min. 76,900 ft 105min 7,600 ft 180min. 45,400 ft. 157min. Retrieve 0 ft 186min

Balloon on the Ground  KCI 1200 – popular weather balloon – Flaccid Body Length: 226 cm (7.4ft) – Average Weight: 1200 g (2.4lb)

Balloon before Releasing  Gross Lift:3440 g  Payload: 1050 g  Diameter: 179 cm  Rate of Ascent:320 m/min (12mph) Parachute Balloon Payload

System  Example: by UK High Altitude Society

Images/Videos  Cameras programmed to take pictures at a fixed interval  Video always on  No live broadcast

Even Teddy Bears Went to Space! /Out-world-British-teddy-bears-strapped- helium-weather-balloon-reach-edge-space.html

What’s it like at 32km? Layer Level Name Height km (ft) Base Temperature °C (F) Base Atmospheric Pressure (Pa) 0Troposphere (59)101,325 1Tropopause11 (36,000)−56.5 (-70) 22,632 2Stratosphere20 (65,000)−56.5 (-70) 5, Stratosphere32 (105,000)−44.5 (-48) Stratopause47 (154,000) −2.5 (28) Mesosphere51 (167,000) −2.5 (28) Mesosphere71 (233,000) −58.5 (-73) Mesopause85 (279,000) −86.2 (-123) 0.37

How Does It Come Down?  It “pops” at the bursting altitude: 33.2 km  How big is the balloon? – Ideal gas law : – At the ground level  D 0 = 1.76 m  p 0 = Pa  T 0 = 15 C (= 288 K) – At 32km  p 1 = 868 Pa  T 1 = -44 C (= 229 K)  Diameter at Burst: 8.6 m! (28 ft)  or 

Descent  Maximum speed:150 mph – Parachute slows it down  Balloon predictor – Time – Launch site – Ascent rate – Descent rate  predicted GPS track  Just an indicator

Retrieval  The balloon travels about 20 miles horizontally  A transmitter in the payload box transmits its GPS location

Retrieved Data  GPS track, temperature, pictures, movies, etc.

Mission Ideas  Aim to launch balloons every 6 months – 2.3 lbs payload, iPhone as a primary computer  Science – “Would the cockroach survive at 30km?” – “Boiled egg vs raw egg” – Potato chips – Ping-pong ball – Wind, Temperature, GPS position  Gliding from space (2011)  Live images/videos (2012)  Staying aloft (2013)

Questions?

paper Vulture ft straws Pilot "cockpit "

– データをとって送信する iPhone 用のプログラ ムの開発 ← 一番時間がかかる – パラシュートの折りたたみ＆展開実験（ビルの 屋上から） – 着地の際の衝撃の評価  第２回公開実験：２０１１年秋 – 小型 HD カメラの撮影映像を送信する – パラシュートに代わる飛行体による滑空帰還  第３回公開実験：２０１２年春 – ライブ映像送信と滑空帰還（その２） – 高高度（地上２０キロ辺り）の滞空実験