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| | Space Today Online - NASA Deep Space Network communications with interplanetary probes |
 | | The complexes are far from heavily populated areas so that the very weak signals from distant spacecraft are not contaminated or obscured by radio interference from electrical power lines, radio and television stations, or household and industrial appliances. |
 | | Unfortunately for scientific communication, microwave radio also is used on Earth by television stations, cellular telephone towers, data communication networks, radar, FM radio broadcasts, and transmissions to and from Earth-orbiting satellites. |
 | | In 2002, the Deep Space Network engineers celebrated 25 years of two-way communication with the Voyager-1 and Voyager-2 spacecraft, which today are exploring the far outer reaches of the Solar System. |
| www.spacetoday.org /SolSys/DeepSpaceNetwork/DeepSpaceNetwork.html (1973 words) |
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