History of Satellite Communications The first idea of satellite communication came from an article in 1945 named Wireless World‚ where Author C. Clarke described the use of manned satellites in 24 hour orbits to distribute television programs. However‚ the first person to carefully evaluate the technical and financial aspects of such a venture was John R. Pierce of Bell Telephone Laboratories (Whalen‚ n.d.). In a 1954 speech and 1955 article‚ Pierce described the usefulness of a communications
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Satellite Telecommunications Network and Telecommunications Concepts 360 September 11‚ 2005 Table of Contents Introduction Satellite Communications History Sputnik Changed Everything America ’s Response Future Trends in Satellite Communications GEO vs. LEO Bent-Pipe Satellite Relay vs. the Switch in the Sky Companies Involved in Satellite Communications Regulatory Issues in Satellite Communications Global implications for the
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India has launched 74 artificial satellites in space .Here are some of them- Aryabhatta It was indias first satellite.It was launched by the Soviet Union on 19 April 1975[1] from Kapustin Yar using a Kosmos-3M launch vehicle. It was built by the Indian Space Research Organisation (ISRO) The launch came from an agreement between India and the Soviet Union directed by U.R. Rao and signed in 1972. It allowed the USSR to use India ports for tracking
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1 SATELLITE COMMUNICATION – AN INTRODUCTION Contents 1.1 Introduction 1.2 Basics 1.3 Applications of Satellites o Weather Forecasting o Radio and TV Broadcast o Military o Navigation o Global Telephone o Connecting Remote Areas o Global Mobile Communication 1.4 Frequency Allocation of Satellites 1.5 Types of Orbits o GEO o LEO o MEO o Sun Synchronous Orbit o Hohmann Transfer Orbit o Prograde Orbit o Retrograde Orbit o Polar Orbits 1.6 Examples o INTELSAT o U.S. Domsats o Polar Orbiting Satellites
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Satellite Communication Engineering Michael O. Kolawole Jolade Pty. Ltd. Melbourne‚ Australia Marcel Dekker‚ Inc. TM New York • Basel Copyright © 2002 by Marcel Dekker‚ Inc. All Rights Reserved. ISBN: 0-8247-0777-X This book is printed on acid-free paper. Headquarters Marcel Dekker‚ Inc. 270 Madison Avenue‚ New York‚ NY 10016 tel: 212-696-9000; fax: 212-685-4540 Eastern Hemisphere Distribution Marcel Dekker AG Hutgasse 4‚ Postfach 812‚ CH-4001 Basel‚ Switzerland tel: 41-61-261-8482; fax: 41-61-261-8896
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Chapter #1-What is Satellite Radio? People all around the world have their favorite radio stations that are preset into car radios‚ flipping between them driving to and from work‚ on errands and around town. The only problem is‚ when traveling too far away from the source station‚ the signal breaks up and fades into static. Most radio signals can only travel about 30 or 40 miles from their source‚ in big market areas. Looking around Canada‚ there are many areas where terrestrial radio is just not
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Female Spies of War World I During World War I there were few female spies but the most commonly and famously known ones were Marta Hari the alias of Margaretha Geertruida Zelle and Edith Cavell. Both women were on opposite ends of the spectrum‚ Marta Hari who used her charms and beautiful looks to attract men and obtain information for the Germans was an exotic dancer while Edith Cavell a nurse who was very motherly like‚ helped wounded Allied soldiers and gathered information from them. Sadly
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Satellite communication‚ in telecommunications‚ is the use of artificial satellites to provide communication links between various points on Earth. Satellite communications play a vital role in the global telecommunications system. Approximately 2‚000 artificial satellites orbiting Earth relay analog and digital signals carrying voice‚ video‚ and data to and from one or many locations worldwide. Satellite communication has two main components: the ground segment‚ which consists of fixed or mobile
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Artificial satellites are those put into orbit by man. Equipment on a satellite is hardened to survive in the radiation and vacuum of space. Since there is no air in space and therefore no air resistance‚ satellites come in many shapes and sizes. Types of Satellites and their Uses We use satellites for different purposes and all satellites can be placed in one of the following categories: Communications Satellites Distribution of television and audio signals‚ and telephone connections via satellite
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Subject : Introduction to satellite (SCM01D4) Introduction Eclipses can only occur when the Sun‚ Earth‚ and Moon are all in a straight line. Solar occur at new moon‚ when the Moon is between the Sun and Earth and in contrast‚ lunar eclipses occur at full moon‚ when Earth is between the Sun and Moon. The apparent size of the Moon is roughly the same as that of the Sun‚ with both being viewed at close
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