00936nam a2200253 i 450099100389154970753620020509133925.0970419s1988 it 00| 0 ita db11230496-39ule_instPARLA190699ExLDip.to Filosofiaita195Bruno, Giordano,<1548-1600>45390Le ombre delle idee /Giordano BrunoMilano :Spirali,1988147 p. ;21 cmCome pensare ;9.b1123049623-02-1701-07-02991003891549707536LE005 195 BRU01. 0112005000035425le005-E0.00-l- 01110.i1138595901-07-02LE022 MPs-S 125 E 3012022000190589le022-E0.00-l- 01010.i1138596001-07-02De umbris idearum27988UNISALENTOle005le02201-01-97ma -itait 3205492nam 2200769Ia 450 991101977110332120200520144314.09786610272044978128055524412805552469781280272042128027204X978047034586304703458619780470866856047086685397804708668630470866861(CKB)111087027104834(EBL)175042(OCoLC)475880185(SSID)ssj0000268564(PQKBManifestationID)11192788(PQKBTitleCode)TC0000268564(PQKBWorkID)10242307(PQKB)11517951(MiAaPQ)EBC175042(Perlego)2788306(EXLCZ)9911108702710483420031007d2003 uy 0engur|n|---|||||txtccrVSAT networks /Gerard Maral2nd ed.West Sussex, England ;Hoboken, NJ J. Wileyc20031 online resource (295 p.)Description based upon print version of record.9780470852439 0470852437 9780470866849 0470866845 Includes bibliographical references (p. [265]-266) and index.VSAT Networks; Contents; Preface; Acronyms and Abbreviations; Notation; 1 Introduction; 1.1 VSAT network definition; 1.2 VSAT network configurations; 1.3 User terminal connectivity; 1.4 VSAT network applications and types of traffic; 1.4.1 Civilian VSAT networks; 1.4.2 Military VSAT networks; 1.5 VSAT networks: involved parties; 1.6 VSAT network options; 1.6.1 Star or mesh?; 1.6.2 Data/voice/video; 1.6.3 Fixed/demand assignment; 1.6.4 Frequency bands; 1.6.5 Hub options; 1.7 VSAT network earth stations; 1.7.1 VSAT station; 1.7.2 Hub station; 1.8 Economic aspects; 1.9 Regulatory aspects1.9.1 Licensing1.9.2 Access to the space segment; 1.9.3 Local regulations; 1.10 Conclusions; 1.10.1 Advantages; 1.10.2 Drawbacks; 2 Use of satellites for VSAT networks; 2.1 Introduction; 2.1.1 The relay function; 2.1.2 Transparent and regenerative payload; 2.1.3 Coverage; 2.1.4 Impact of coverage on satellite relay performance; 2.1.5 Frequency reuse; 2.2 Orbits; 2.2.1 Newton's universal law of attraction; 2.2.2 Orbital parameters; 2.3 The geostationary satellite; 2.3.1 Orbit parameters; 2.3.2 Launching the satellite; 2.3.3 Distance to the satellite; 2.3.4 Propagation delay2.3.5 Conjunction of the sun and the satellite2.3.6 Orbit perturbations; 2.3.7 Apparent satellite movement; 2.3.8 Orbit corrections; 2.3.9 Doppler effect; 2.4 Satellites for VSAT services; 3 Operational aspects; 3.1 Installation; 3.1.1 Hub; 3.1.2 VSAT; 3.1.3 Antenna pointing; 3.2 The customer's concerns; 3.2.1 Interfaces to end equipment; 3.2.2 Independence from vendor; 3.2.3 Set-up time; 3.2.4 Access to the service; 3.2.5 Flexibility; 3.2.6 Failure and disaster recovery; 3.2.7 Blocking probability; 3.2.8 Response time; 3.2.9 Link quality; 3.2.10 Availability; 3.2.11 Maintenance3.2.12 Hazards3.2.13 Cost; 4 Networking aspects; 4.1 Network functions; 4.2 Some definitions; 4.2.1 Links and connections; 4.2.2 Bit rate; 4.2.3 Protocols; 4.2.4 Delay; 4.2.5 Throughput; 4.2.6 Channel efficiency; 4.2.7 Channel utilisation; 4.3 Traffic characterisation; 4.3.1 Traffic forecasts; 4.3.2 Traffic measurements; 4.3.3 Traffic source modelling; 4.4 The OSI reference model for data communications; 4.4.1 The physical layer; 4.4.2 The data link layer; 4.4.3 The network layer; 4.4.4 The transport layer; 4.4.5 The upper layers (5 to 7); 4.5 Application to VSAT networks4.5.1 Physical and protocol configurations of a VSAT network4.5.2 Protocol conversion (emulation); 4.5.3 Reasons for protocol conversion; 4.6 Multiple access; 4.6.1 Basic multiple access protocols; 4.6.2 Meshed networks; 4.6.3 Star-shaped networks; 4.6.4 Fixed assignment versus demand assignment; 4.6.5 Random time division multiple access; 4.6.6 Delay analysis; 4.6.7 Conclusion; 4.7 Network design; 4.7.1 Principles; 4.7.2 Guidelines for preliminary dimensioning; 4.7.3 Example; 4.8 Conclusion; 5 Radio frequency link analysis; 5.1 Principles; 5.1.1 Thermal noise; 5.1.2 Interference noise5.1.3 Intermodulation noiseVSAT Networks: Second Edition covers all the important issues involved with the installation of VSAT systems.Since the first edition was published, the VSAT market has continued to expand steadily. VSAT technologies have advanced, prompting an increase in the take-up of VSAT services.Offering a comprehensive introduction to the topic followed by a detailed exploration of multiple access protocols, delay analysis and system dimensioning, this edition is a highly relevant update of VSAT Networks. Written by a well respected and established member of the satellite communityVSATs (Telecommunication)TelecommunicationVSATs (Telecommunication)Telecommunication.384.5/1384.51621.39Maral Gerard334720MiAaPQMiAaPQMiAaPQBOOK9911019771103321VSAT networks1934530UNINA