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LightSail. Lightsail Objectives Demonstrate viability of Solar Sails –Ability to alter orbit energy in positive direction –Ability to manage orbital energy.

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Presentation on theme: "LightSail. Lightsail Objectives Demonstrate viability of Solar Sails –Ability to alter orbit energy in positive direction –Ability to manage orbital energy."— Presentation transcript:

1 LightSail

2 Lightsail Objectives Demonstrate viability of Solar Sails –Ability to alter orbit energy in positive direction –Ability to manage orbital energy –Ability to control spacecraft under solar sail power Develop and demonstrate key technologies –Sail deployment –Sail material management during flight Demonstrate pathway to deep space flight with solar sails –Lightweight spacecraft –Compact and lightweight booms –Navigation technologies

3 Our LightSail Program LightSail-1 demonstrates controlled flight by light 40 sq meters, 5 kg LightSail-2 flies further, longer to raise orbit energy 100 sq meters, 5 kg LightSail-3 escapes Earth orbit and flies outside of Earth gravity 300 sq meters, 15 kg ,000,000 10,000 1,000 Km

4 The LightSail-1 Spacecraft Solar Panels (10) Battery Avionics Package C&DH Board Power Regulation Transceiver Payload interface Board Momentum Wheel Single Axis Gyro (3) Torque Rod (3) Cameras (2) 3 axis Accelerometer (2) Trac Booms (4) Sail (4) Sail Deployment Mechanism Sun Sensor (4) 3 axis Accelerometer (2) Whip Antenna Solar Sail Storage (4)

5 Spacecraft Stowed, Deployed

6 PPOD Launch Interface Poly Picosatellite Orbital Deployer PPOD Ejector – flown > 20 times Arrives fully integrated Mass < 10 kg total Volume envelope: 14x14x40 cm Ejection through single voltage signal Bolted mechanical interface Orbit > 825 km altitude, I > 75 degrees Launch after January 2011 PPOD Integrated on 4 th stage PPOD Ejector (right) with companion satellite (left) Louis Friedman, Bill Nye The Science Guy, Jordi Puig-Suari

7 LightSail-1 Concept of Operations Delta Secondary launch with NPP (June 2011) Vandenberg AFB Sun Synchronous Orbit 824 km, inclined 98° 9.6 Kbps 437 MHz downlink FSK. Acceleration data and 2 camera images/day Sail uses sun energy to gain orbit energy (up to 4.29x10 -5 m/s 2 when “on”) week mission life. Command and Control from Cal Poly and Ga. Tech and other ground stations as appropriate Amateur Optical trackers to provide position data Drift away from primary vehicle, eject from PPOD, deploy whip antenna, 3 axis stabilization. Solar panel deployment followed by Solar Sail (Sail deployment video stored for downlink)

8 Project Organization Program Manager Friedman Lightsail 1 Flight Project Manager Cantrell Mission Operations Dave Spencer Georgia Tech Flight Systems Stellar Exploration Spacecraft Stellar/CPSLO Sail Module Stellar Camera Aerospace PPOD Ejector CPSLO Launch TPS/Ames System Engineering Jim Ingersoll Program Development Public Relations Monica Lopez Public Information and Communication Public Engagement Development Review Team: Program Partner Druyan/Cosmos Sudios Huntress Cunningham Kerzhanovich Schurmeier Stetson Shirley Yost

9 Orbit Determination: Feeling the Force Laser Ranging –International Laser Ranging Service measures ranges from ground stations to satellite retro- reflectors to millimeter accuracy –Status: ILRS contacted Optical Observations −Engage amateur astronomy network to provide optical measurements −Right ascension and declination (angles) determined by reference to known stars −Observation times synchronized to international time signals −Status: In discussions with Gil Moore, Project Starshine Director

10 Orbit Determination (cont.) Radar Observations -NORAD Two-Line Elements -Mean elements based upon Earth true equator, mean equinox of epoch frame -Frequency of observation varies based upon orbit Accelerometer Measurements -On-board measurements of body-fixed accelerations in 3-axes -Lumidyne Test Experiment – sensitive to 0.1 µg, –6 accelerometers, mass <200 gm Orbit Determination Solutions -Orbit solution based upon flight-proven OD methods

11 LightSail-1: Ready for Launch 2011

12 Join the team: planetary.org/special/fromearth/sailhttp://planetary.org planetary.org/special/fromearth/sail


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