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| SSP Assembly Challenges Gordon Woodcock . 4000 MW solar cell . 2000 MWe to grid(?) . High Temp Superconductors ??? 77K . 600 launches, 4e7 kg? 15km^2^? . 5.8 GHz |
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| Introduction to Space Solar Power for the Global Electric Power Utility Market . WiSEE SSP Workshop . November 8, 2013 . Baltimore, MD . Darel Preble . President, Space Solar Power Institute www.solarsat.org . Chair, Space Solar Power Workshop www.sspi.gatech.edu . p24 Sidelobe Graph - 0.01mW/cm^2^ peak at 440km radius . Predicted ground-level microwave power density for a full-power GEO SPS as a function of distance -Credit: J. M. Osepchuk, IEEE Microwave, “How Safe Are Microwaves and Solar Power from Space”, IEEE Microwave magazine, vol. 3, issue 4. page 58-64, Dec. 2002. . p34 Communication satellites are now a $250+ Billion industry per year. . p42 GSO launches and forecast . p44 picture of [[http://www.centauri-dreams.org/?p=13500 | ATK space systems 20 meter solar sail ]]. Conflated with solar cell? {{attachment:scitech_solarsails_solar-sails-2.jpg||width=100}}[[attachment:scitech_solarsails_solar-sails-2.jpg|larger]] . no way to move power out of cells that thin; the cells make perhaps 200 amps per square meter at about a volt. IR drop would be awful for a large array with gossamer-thin conductors. Monocrystalline photovoltaic cells do not fold the way these aluminized mylar films do. . assumes thinned silicon, shows graph on page 45 with exotic multjunctions at 46%, silicon ranging from 13% to 25%. Thin silicon at back end of life will be closer to the first number. . may not understand that "dispatchable" means adjustable to time demand, opposite of base load . 99.3% available means up to 72 minute eclipse loss for 22 days in spring and fall . nothing about shutting down to avoid communication interference . nothing about >= 50m/s/year stationkeeping . nothing about coexistence with existing comsats |
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| Introduction to Space Solar Power for the Global Electric Power Utility Market WiSEE SSP Workshop November 8, 2013 Baltimore, MD Darel Preble President, Space Solar Power Institute www.solarsat.org Chair, Space Solar Power Workshop www.sspi.gatech.edu p24 Sidelobe Graph - 0.01mW/cm^2^ peak at 440km radius Predicted ground-level microwave power density for a full-power GEO SPS as a function of distance -Credit: J. M. Osepchuk, IEEE Microwave, “How Safe Are Microwaves and Solar Power from Space”, IEEE Microwave magazine, vol. 3, issue 4. page 58-64, Dec. 2002. p34 Communication satellites are now a $250+ Billion industry per year. |
----- Mission design of WPT Space Demonstration Experiment using Small Scientific Satellite toward SPS Tanaka . 5.729 GHz 370km orbit 200kg 2kW 1.9m antenna . ground 16μW/m2（MAX）Beam width on the ground φ ～30km ----- SSP: Hearts and Minds Brent Sherwood . p8 Geopolitics: Urban Geography from GEO city longitude ----- Contreras LEO SSPS in 1620km orbit ----- |
GEO-SBSP2
2013 Conference NOTES from slides:
SSP Assembly Challenges Gordon Woodcock
- 4000 MW solar cell
- 2000 MWe to grid(?)
- High Temp Superconductors ??? 77K
600 launches, 4e7 kg? 15km2?
- 5.8 GHz
Introduction to Space Solar Power for the Global Electric Power Utility Market
- WiSEE SSP Workshop
- November 8, 2013
- Baltimore, MD
- Darel Preble
- President, Space Solar Power Institute www.solarsat.org
- Chair, Space Solar Power Workshop www.sspi.gatech.edu
p24 Sidelobe Graph - 0.01mW/cm2 peak at 440km radius
- Predicted ground-level microwave power density for a full-power GEO SPS as a function of distance -Credit: J. M. Osepchuk, IEEE Microwave, “How Safe Are Microwaves and Solar Power from Space”, IEEE Microwave magazine, vol. 3, issue 4. page 58-64, Dec. 2002.
- p34 Communication satellites are now a $250+ Billion industry per year.
- p42 GSO launches and forecast
p44 picture of ATK space systems 20 meter solar sail. Conflated with solar cell?
larger - no way to move power out of cells that thin; the cells make perhaps 200 amps per square meter at about a volt. IR drop would be awful for a large array with gossamer-thin conductors. Monocrystalline photovoltaic cells do not fold the way these aluminized mylar films do.
- assumes thinned silicon, shows graph on page 45 with exotic multjunctions at 46%, silicon ranging from 13% to 25%. Thin silicon at back end of life will be closer to the first number.
- may not understand that "dispatchable" means adjustable to time demand, opposite of base load
- 99.3% available means up to 72 minute eclipse loss for 22 days in spring and fall
- nothing about shutting down to avoid communication interference
nothing about >= 50m/s/year stationkeeping
- nothing about coexistence with existing comsats
Mission design of WPT Space Demonstration Experiment using Small Scientific Satellite toward SPS Tanaka
- 5.729 GHz 370km orbit 200kg 2kW 1.9m antenna
- ground 16μW/m2（MAX）Beam width on the ground φ ～30km
SSP: Hearts and Minds Brent Sherwood
- p8 Geopolitics: Urban Geography from GEO city longitude
Contreras LEO SSPS in 1620km orbit