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TDRS |
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Boeing has firm orders for 32 commercial, civil and defense satellites, including the remaining TDRS models, for $4. The TDRS network will greatly increase NASA's communications with other satellites and the space shuttles. The TDRS satellites are designed to let NASA phase out much of its ground-based tracking network, as well as to markedly increase the amount of time that orbiting shuttles and other space-borne devices are in communication with the ground; in addition, a number of forthcoming NASA satellites such as the Hubble Space Telescope (due for shuttle launch in 1989) have been designed on the assumption that at least two TDRS's will be available at any given time. |
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