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Books > Professional & Technical > Electronics & communications engineering > Communications engineering / telecommunications
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Deep Space Telecommunications Systems Engineering (Paperback, Softcover reprint of the original 1st ed. 1983)
Loot Price: R2,438
Discovery Miles 24 380
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Deep Space Telecommunications Systems Engineering (Paperback, Softcover reprint of the original 1st ed. 1983)
Series: Applications of Communications Theory
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The challenge of communication in planetary exploration has been
unusual. The guidance and control of spacecraft depend on reliable
communication. Scientific data returned to earth are irreplaceable,
or replaceable only at the cost of another mission. In deep space,
communications propagation is good, relative to terrestrial
communications, and there is an opportunity to press toward the
mathematical limit of microwave communication. Yet the limits must
be approached warily, with reliability as well as channel capacity
in mind. Further, the effects of small changes in the earth's
atmosphere and the interplanetary plasma have small but important
effects on propagation time and hence on the measurement of
distance. Advances are almost incredible. Communication capability
measured in 18 bits per second at a given range rose by a factor of
10 in the 19 years from Explorer I of 1958 to Voyager of 1977. This
improvement was attained through ingenious design based on the sort
of penetrating analysis set forth in this book by engineers who
took part in a highly detailed and amazingly successful pro gram.
Careful observation and analysis have told us much about
limitations on the accurate measurement of distance. It is not easy
to get busy people to tell others clearly and in detail how they
have solved important problems. Joseph H. Yuen and the other
contribu tors to this book are to be commended for the time and
care they have devoted to explicating one vital aspect of a great
adventure of mankind."
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