LEADER 05299nam 2200673Ia 450 001 9910830600103321 005 20230617024725.0 010 $a1-280-55524-6 010 $a1-280-27204-X 010 $a9786610272044 010 $a0-470-34586-1 010 $a0-470-86685-3 010 $a0-470-86686-1 035 $a(CKB)111087027104834 035 $a(EBL)175042 035 $a(OCoLC)475880185 035 $a(SSID)ssj0000268564 035 $a(PQKBManifestationID)11192788 035 $a(PQKBTitleCode)TC0000268564 035 $a(PQKBWorkID)10242307 035 $a(PQKB)11517951 035 $a(MiAaPQ)EBC175042 035 $a(EXLCZ)99111087027104834 100 $a20031007d2003 uy 0 101 0 $aeng 135 $aur|n|---||||| 181 $ctxt 182 $cc 183 $acr 200 10$aVSAT networks$b[electronic resource] /$fGe?rard Maral 205 $a2nd ed. 210 $aWest Sussex, England ;$aHoboken, NJ $cJ. Wiley$dc2003 215 $a1 online resource (295 p.) 300 $aDescription based upon print version of record. 311 $a0-470-85243-7 311 $a0-470-86684-5 320 $aIncludes bibliographical references (p. [265]-266) and index. 327 $aVSAT 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 aspects 327 $a1.9.1 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 delay 327 $a2.3.5 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 Maintenance 327 $a3.2.12 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 networks 327 $a4.5.1 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 noise 327 $a5.1.3 Intermodulation noise 330 $aVSAT 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 community 606 $aVSATs (Telecommunication) 606 $aTelecommunication 615 0$aVSATs (Telecommunication) 615 0$aTelecommunication. 676 $a384.5/1 676 $a384.51 676 $a621.39 700 $aMaral$b Ge?rard$0334720 801 0$bMiAaPQ 801 1$bMiAaPQ 801 2$bMiAaPQ 906 $aBOOK 912 $a9910830600103321 996 $aVSAT networks$91934530 997 $aUNINA LEADER 01969nam0 2200409 i 450 001 TO00322359 005 20251003044404.0 010 $a8815045945 020 $aIT$b95-2926 100 $a19960726d1994 ||||0itac50 ba 101 | $aita 102 $ait 181 1$6z01$ai $bxxxe 182 1$6z01$an 200 1 $aCeto politico e dirigenza amministrativa nei comuni italiani$fValerio Belotti e Marco Maraffi 210 $aBologna$cIl mulino$d[1994] 215 $a234 p.$d22 cm 225 | $aOrganizzazione e funzionamento della pubblica amministrazione$v43 300 $aIn appendice: Il disegno della ricerca e gli aspetti di metodo, Il questionario. 410 0$1001CFI0167920$12001 $aOrganizzazione e funzionamento della pubblica amministrazione$v43 676 $a305.524$9$v21 676 $a305.93510945$9$v21 676 $a305.9354$9PERSONE SECONDO LA LORO ATTIVITA. Governo locale$v20 676 $a305.9354$9PERSONE SECONDO LA LORO ATTIVITA. Governo locale$v21 676 $a324.204$9PARTITI POLITICI. Relazioni dei partiti politici con lo stato e l'amministrazione pubblica.$v21 676 $a352$9AMMINISTRAZIONI LOCALI.$v12 676 $a352.000473$9AMMINISTRAZIONI LOCALI. RIORGANIZZAZIONE$v20 700 1$aBelotti$b, Valerio$3CFIV094954$4070$0116356 701 1$aMaraffi$b, Marco$3BVEV008649$4070$0116357 801 3$aIT$bIT-000000$c19960726 850 $aIT-BN0095 901 $bNAP 01$cPOZZO LIB.$nVi sono collocati fondi di economia, periodici di ingegneria e scienze, periodici di economia e statistica e altri fondi comprendenti documenti di economia pervenuti in dono. 912 $aTO00322359 950 0$aBiblioteca Centralizzata di Ateneo$c1 v.$d 01POZZO LIB.ECON MON 5842$e 0101 0000169975E VMA 1 v.$fB $h20210409$i20210409 977 $a 01 996 $aCeto politico e dirigenza amministrativa nei comuni italiani$9633772 997 $aUNISANNIO