Satellite internet services are expanding rapidly, but the ground terminals required to connect to them are expensive and power-hungry. French startup Greenerwave is building a terminal that uses something they call a “reconfigurable intelligent surface” (RIS) to reduce both costs and energy consumption. Constellations of low-earth-orbit (LEO) satellites from companies like Starlink and Eutelsat OneWeb promise to provide connectivity anywhere in the world. But establishing links with satellites ...