Communicating from the edge of the solar system: Centimeter-band transmissions, three-dimensional data compression, and laser-based systems may launch unmanned missions to deep space

Centimeter-band transmissions, three-dimensional data compression, and laser-based systems are discussed for future use in unmanned missions to deep space. Project Galileo, a planned two-in-one spacecraft that is to explore Jupiter and four of its moons as an orbiting weather satellite, while a canonical probe detaches from the orbiter and plunges into the Jovian atmosphere, is highlighted. Details of the Galileo communications link and interplanetary environment are described. The upgrading of NASA´s Deep Space Network (DSN) is also reported. This network is being upgraded to nine antennas: six 34-meter antennas and three 64-meter ones; and by the time the Galileo craft reaches Jupiter, the DSN 64-meter antennas will have been enlarged to 70 meters. Proposals for more advanced communications links to be used for the late 20th and early 21st century space missions are outlined.