From Space.com
WASHINGTON — A former NASA scientist has used radio waves to transmit solar power a distance of 92 miles (148 km) between two Hawaiian islands, an achievement that he says proves the technology exists to beam solar power from satellites back to Earth.
John C. Mankins demonstrated the solar power transmission for the Discovery Channel, which paid for the four month experiment and will broadcast the results Friday at 9 p.m. EDT. His vision is to transmit solar power collected by orbiting satellites as large as 1,102 pounds (500 kg) to lake-sized receiver stations on Earth.
Mankins, who worked at NASA for 25 years and managed the agency's space-based solar program before it was disbanded, transmitted 20 watts of power between the two islands in May. The receivers, however, were so small that less than one one-thousandth of a percent of the power was received, Mankins said.
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