## page was renamed from GEO-SBSP2 = 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? 15km^2^? . 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/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 ----- 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 -----