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| . 600 launches, 4e7 kg? 15km^2^? . 5.8 GHz |
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| . p42 GSO launches and forecast | . 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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| Contreras LEO 1620 | 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