Space Balloon – 999 ProjectSpace Balloon – 999 Project

Michio InoueSpace Online School

02/05/2011

Galaxy Express 999Galaxy Express 999

Leiji Matsumoto

Earth Orbiting SatellitesEarth Orbiting Satellites Geo-stationary orbit:

36,000km (22,000mi)

ISS: 350-400km (220-250mi)

GPS: 20,200km (12,550mi)

very expensive!

Gateway to SpaceGateway to SpaceSpaceShipOne: 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 BalloonsSpace 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

Launcht=0min.

Canadian group (SABLE) August 2007

4,700 ft6min.

22,900 ft

117,597 ft (max)140min.

Photo: Nikon Coolpix P2 http://www.sbszoo.com/bear/sable/sable3.htm

30min.

76,900 ft105min

7,600 ft180min.

45,400 ft.157min.

Retrieve

0 ft186min

Balloon on the GroundBalloon on the GroundKCI 1200 – popular weather balloon

– Flaccid Body Length: 226 cm (7.4ft)– Average Weight: 1200 g (2.4lb)

http://www.sbszoo.com/bear/sable/sable3.htm

Balloon before ReleasingBalloon before ReleasingGross Lift: 3440 g Payload: 1050 gDiameter: 179 cm

Rate of Ascent:320 m/min (12mph)

Parachute

Balloon

Payload

SystemSystem Example: by UK

High Altitude Society

Images/VideosImages/VideosCameras programmed to take pictures

at a fixed intervalVideo always onNo live broadcast

Even Teddy Bears Went to Space! Even Teddy Bears Went to Space!

http://www.dailymail.co.uk/sciencetech/article-1091896/Out-world-British-teddy-bears-strapped-helium-weather-balloon-reach-edge-space.html

WhatWhat’’s it like at 32km?s it like at 32km?

LayerLevelName

Heightkm (ft)

BaseTemperature

°C (F)

BaseAtmosphericPressure (Pa)

0 Troposphere 0 +15.0 (59) 101,325

1 Tropopause 11 (36,000) −56.5 (-70) 22,632

2 Stratosphere 20 (65,000) −56.5 (-70) 5,474.9

3 Stratosphere 32 (105,000) −44.5 (-48) 868.02

4 Stratopause 47 (154,000) −2.5 (28) 110.91

5 Mesosphere 51 (167,000) −2.5 (28) 66.94

6 Mesosphere 71 (233,000) −58.5 (-73) 3.96

7 Mesopause 85 (279,000) −86.2 (-123) 0.37

How Does It Come Down?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 D0 = 1.76 m

p0 = 101325 Pa

T0 = 15 C (= 288 K)

– At 32km p1 = 868 Pa

T1 = -44 C (= 229 K)

Diameter at Burst: 8.6 m! (28 ft)

or

DescentDescent Maximum speed:150 mph

– Parachute slows it down

Balloon predictor– Time– Launch site– Ascent rate– Descent rate

predicted GPS track

Just an indicator

http://nearspaceventures.com/w3Baltrak/readyget.pl

RetrievalRetrieval The balloon travels about 20 miles horizontally A transmitter in the payload box transmits

its GPS location

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

Mission IdeasMission IdeasAim to launch balloons every 6 months

– 2.3 lbs payload, iPhone as a primary computerScience

– “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?Questions?

http://abcnews.go.com/Technology/slideshow/paper-airplane-launched-edge-space-returns-photographs-earth-12121525

paper

Vulture 1

http://www.theregister.co.uk/2010/11/17/vulture_cad/

3 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