Summary of Proposed Design Examples Early in the project a request for proposals for design examples was made. Twenty two proposals were submitted, and four of these evolved into the examples presented in Chapter 10. The other proposals and comments are briefly summarised below. In some cases similar ideas have been combined in a single entry Laser/Space-to-Space Using a laser tuned to near infre-red or optical frequencies, it would be possible to use a satellite to provide power to existing satellites near die end of their lifetime by beaming power onto their solar arrays. Power for g-gravity platform Two small satellites, to be carried by Ariane, are launched. The mother satellite has solar arrays and a transmitter and the daughter a rectenna.. Energy beamed from the mother an be used to power microgravity experiments on the daughter. The rectenna is jetisoned before re-entry. Peak power for Earth To have a Solar Power Satellite in such an orbit (sun synchronous) that you selectively deliver peakpower to ground, because you can sell that for a higher price. SPS constellation Constellation of small SPS in LEO (rather than a few big SPS in GEO). Deployable (Inflatable/Rigidizable) Gravitationally stabilised inflatable platform. Thin film amorphous silicon photovoltaic arrays on the surface of the inflatable. The size of the satellite is easily scaled up for increased power. Power beaming for Space Transportation A satellite beaming energy to vehicles for use in powering electrical propulsion systems. A 10- lOOkW demo could be carried out for $800M $800 M/Deployed/SPS 2000-class Similar concept to SPS2000, but in sun synchronous polar orbit at 1000-1500km. Beaming 10-15kW to earth, probably to power experiments at the poles. Could be used as the first satellite in a constellation. Space(Space Shattle)-to-Space Power beamed from the Space Shuttle cargo bay to a dead satellite by laser. Ground-to-Space-to-Space A mother satellite to relay power transmitted from a ground antenna to a daughter satellite. Antarctic Power Satellite Program (Space to Earth Demonstration) Polar orbiting satellite to provide power to Antarctic bases. Possibly in Molniya oibit to maximise duty cycle. 1MW class SPS Low earth orbit photovoltaic array beaming 1MW to earth. Launchable on a single Energiya launcher.
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