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Artist concept of the STS-43 Tracking and Data Relay Satellite E (TDRS-E)

Artist concept of the STS-43 Tracking and Data Relay Satellite E (TDRS-E)



Artist concept shows the Tracking and Data Relay Satellite E (TDRS-E) augmenting a sophisticated TDRS system (TDRSS) communications network after deployment during STS-43 from Atlantis, Orbiter Vehicle (OV) 104. TDRS, built by TRW, will be placed in a geosynchronous orbit and after onorbit testing, which requires several weeks, will be designated TDRS-5. The communications satellite will replace TDRS-3 at 174 degrees West longitude. The backbone of NASA's space-to-ground communications, the TDRSs have increased NASA's ability to send and receive data to spacecraft in low-earth orbit to more than 85 percent of the time. Before TDRS, NASA relied solely on a system of ground stations that permitted communications only 15 percent of the time. Increased coverage has allowed onorbit repairs, live television broadcast from space and continuous dialogues between astronaut crews and ground control during critical periods such as Space Shuttle landings.

Free Space artwork and designs. Since its creation in 1958, NASA has been taking copyright-free pictures of the Earth, the Moon, the planets, and other astronomical objects inside and outside our Solar System. Under United States copyright law, works created by the U.S. federal government or its agencies, such as NASA are in public domain and cannot be copyrighted. NASA pictures are legally in the public domain.






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