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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1. Telecommunications Systems Design.- 2. Spectral Characteristics of Digital Modulations.- 3. Receiver Design and Performance Characteristics.- 4. Radio Tracking System.- 5. Telemetry System.- 6. Telemetry System.- 7. Spacecraft Radio Frequency Subsystem.- 8. Spacecraft Antennas.- 9. The Prediction of Weather Effects on Telecommunications Link Performance.- 10. Telecommunications Performance Analysis and Monitoring Software.- 11. Radio Frequency Selection and Radio Interference Prevention.- 12. Space Shuttle and TDRSS Telecommunications System Interfaces.
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Da: Anybook.com, Lincoln, Regno Unito
Condizione: Good. This is an ex-library book and may have the usual library/used-book markings inside.This book has hardback covers. In good all round condition. Please note the Image in this listing is a stock photo and may not match the covers of the actual item,1100grams, ISBN:0306414899. Codice articolo 3940960
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Da: Peter Rhodes, Southampton, Regno Unito
Original Cloth. 1st Edition. Applications of communications theory . 23.5 x 15.5 cm., xx, 603 pp. A collection of chapters by various authors. The book is covered in red cloth with gilt lettering on the spine. CONDITION. VG/ VG. A clean tight copy. The top of the dust jacket spine is chipped. Library class mark on dust jacket spine, and withdrawn stamp on half title page. Free end paper removed. Library stamps on page edges. Ex-Library. Codice articolo 004197
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