Спутник связи. Star One D2. [Редактировать]

Дополнительная классификация

#Наименования
1Тип оператора(владельца) - коммерческий
2Тип орбиты - ГСО
3Страна оператор(владелец) - Бразилия
4Страна производитель - США

Новостная лента[Найти информацию в новостях] [Найти информацию в документах]

#Новостная лента.
12017-10-30. Бразильская Star One выбрала компанию Space Systems Loral и Arianespace для производства и запуска КА.
Бразильский оператор спутниковой связи Embratel Star One объявил о заключении сделки на приобретение нового космического аппарата геостационарной спутниковой связи у Space Systems Loral. Датой пуска назван 2019 год, а в качестве средства выведения выбрана РН Ариан 5 ЕСА. Масса аппарата составит 6200 кг и он будет оснащен C-, Ku-, Ka- и X-диапазонные полезные нагрузки. Спутник будет предназначен для работы на территории Южной и Центральной Америк, а также Мексики и части Атлантического океана.Тэги: Star One D2ArianespaceSpace Systems LoralАриан 5 ECA

Технические характеристики

#ХарактеристикаЗначение
1Масса, кг6200

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...,0° W STAR ONE C1 C, X e Ku 65,0º W STAR ONE C2 C, X e Ku 70,0º W STAR ONE D1 Ka e Ku 70,0º W STAR ONE C3 C e Ku STAR ONE C4 C, L e S STAR ONE C5 C e Ku STAR ONE C6 Ku STAR ONE D2 Ka STAR ONE S.A ORBITAL... 5 C e Ku 116,8° W SES AMERICOM INC. STAR ONE S/A AMC–12 C 37,5° W TELESAT BRASIL... Operador: Lançamento: Cobertura: Processo: Star One S/A 28/03/1995 Todo o territ... Operador: Lançamento: Cobertura: Processo: Star One S/A 04/02/1998. Todo o territ... Operador: Lançamento: Cobertura: Processo: Star One S/A 17/08/2000 Todo o territ...ÇÃO DE SATÉLITE BRASILEIRO STAR ONE C1 Operador: Star One S/A Lançamento: 14/11...ÇÃO DE SATÉLITE BRASILEIRO STAR ONE C2 Operador: Star One S/A Lançamento: 18/04...ÇÃO DE SATÉLITE BRASILEIRO STAR ONE C3 e STAR ONE C4 Operador: Star One S/A Lançamento: Cobertura...ÇÃO DE SATÉLITE BRASILEIRO STAR ONE C5 Operador: Star One S/A Lançamento: Cobertura: Todo...ÇÃO DE SATÉLITE BRASILEIRO STAR ONE C6 e STAR ONE D2 Operador: Star One S/A Lançamento: Cobertura: Todo...ÇÃO DE SATÉLITE BRASILEIRO STAR ONE D1 Operador: Star One S/A Lançamento: Cobertura: Todo...: 03/05/2019 Representante Legal: Star One S/A Status:: Em operação comercial Cobertura...: - OPERADOR: ENDEREÇO: MUNICÍPIO: TELEFONE: STAR ONE S/A Avenida Presidente Vargas, 1012 – 6o...: SES AMERICOM INC REPRESENTANTE LEGAL: Star One S/A ENDEREÇO: Avenida Presidente Vargas, 1012...



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... STORM Jewel Quest: The Sleepless Star - Collector's Edition Tropico 4 (Gold Edition... BioShock (Platinum Collection) [Japan Import] Star Wars Galactic Battlegrounds Saga (Jewel... Edition Star Command Gold Fly To Singapore FS2004 Sam & Max Season One... Import] Jazz Jackrabbit Trilogy GLOBAL STAR SOFTWARE Mall Tycoon ( Windows ) Jumper... Match Adventures Star Wars Clone Wars: Lightsaber Duels + Lego Star Wars Complete... Cell: Conviction [Japan Import] DARK STAR ONE (jewel case) Ultimate Mystery & Adventure... Yakyuu Spirits 5 Kanzenban [Japan Import] Star Wars The Force Unleashed: Ultimate... - Van der Schmash Hammer Disgaea D2: A Brighter Darkness - Playstation 3 Code Lyoko... Day One Edition with Steelbook European Version Fist of the North Star... JPN/Asian systems only) Dark Star One Simcity LE PC Champion Jockey...) New Global Software Publishing Dark Star One (Dvd Style Box) Compatible With... Entertainment Complete Product Standard Playstation 3 Star Wars: Rogue Squadron 3D (Jewel...'s Edition - Playstation 3 Tournament Chess - PC Star Ocean: The Last Hope International... [PC Instant Access] Star Wars Clone Wars + Lego Star Wars Complete Sage... Import] Virtual Seattle 99 GLOBAL STAR SOFTWARE High Rollerz (Windows) Darksiders... Mission: Impossible - Ghost Protocol (DVD) Star Wars The Force Unleashed: Ultimate... Injection New Nintendo Sin & Punishment: Star Successor Action/Adventure Game Standard... Colossus 4 Pack - Build a New Civilization Star Control 3 Nintendo Wii System Video... 3 Handango Arcade Games Suite - PC Star Hidden Expedition: Devil's Triangle Brutal... Vacation Puppy Luv 2 SKU-PAS1066487 Star Trek: 25th Anniversary Microsoft Complete... Pharaoh Fable Anniversary - Xbox 360 Star Wars: TIE Fighter Helicopter Simulator... Effect 2 NEW R.U.S.E. X360 (Videogame Software) Star Wars: Jedi Knight Gold Pack... Case) - PC SPONGEBOB ATLANTIS SQUAREPANTIS Star Trek : Hidden Evil Sonic R Grand... 2 - Playstation 3 Dreamcast Collection LucasArts Entertainment Star Wars: Republic Commando for Windows... Dark Athena - Playstation 3 SUPREME COMMANDER 2 Star Wolves 3 - Civil War Genji: Days...) Trophy Case I - Realms of Arkania: Star Trail, Jagged Alliance, & Druid: Daemons... Legacy A Kate Brooks Adventure Phantasy Star Universe: Ambition of the Illuminus... 3 Replacement Cases (PS3 Replacement Cases) Star Wars: Galactic Battlegrounds Ninja Blade... The Magician's Handbook II: BlackLore Star Raiders Everquest I: The Anniversary Edition... Quality New Lucasarts entertainment Sdvg Star Wars Force Unleashed 2 Collec tors... the Chimp Whispered Stories: Sandman Star Trek Voyager Limited Edition Entertainment... Harry Potter: Years 5-7 - Xbox 360 Star Wolves 2 Rayman Legends - Playstation 3 Grease... (Catalog Category: PC Game s / Adventure ) Star Trek The Next Generation INteractive... Parking Hilarity In 5 Dinertown L ocations Star Wars : Force Unleashed II Cyberfront... & Clank: All 4 One PS3 By Sony PlayStation Disgaea D2 with Product Code... Driver : San Francisco - Collection Essentielles Star Trek: Pinball - PC Ultra Street... Controller (A B X Y+guide) Custom Mod Lego Star Wars: The Complete Saga Champions...] Risen Dragon Age: Origins (PlayStation 3) Star Wars: Battlefront 1 & 2 Sherlock Holmes - The... - PC Lips Number One Hits Bundle -Xbox 360 All Star Cheer 2 - Nintendo... Unleashed II Collector's Edition - Playstation 3 Star Wars Galaxies: An Empire Divided... Deer Hunt Legends Accolade All-Star Sports Collection (HardBall III, Unnecessary... Fall (PlayStation 4) Everquest: Titanium - PC Star Trek The Next Generation Episode... [Japan Import] Commandos 3: Destination Berlin Star Trek the Game Show Activision...] [Japan Import] Tradewinds Classic Lego Star Wars 3 w/Jango Fett - Playstation 3 THQ... Digger Steering Wheel Peripheral Playstation 3 Star Wars: X-Wing Alliance (Jewel Case... Poker SuperStars Invitational Tournament LEGO Star Wars II: The Original Trilogy... Cleopatra 2 Aztec Mysteries Computer Software Star Wars Galaxies: Jump to Lightspeed... Civil War Star Wars: Empire At War Gold Pack + Star Wars: Republic... Daichi No Renkinjutsu~ [Japan Import] Star Defender 2 BlazBlue: Continuum Shift (Limited... Pack Angry Birds Star Wars - Nintendo Wii Lego Star Wars: The Complete... Uk Import Star Wars: Empire At War Gold Pack + Star Wars: The... (MAC)(Jewel Case Version) Silver Star Sekaisaikyo Ginseisyogi Fuuunn Seiko Raiden... Major League Baseball 2K7 - Playstation 3 Star Trek Starfleet Academy Strategic Command... Simulator 98 Escape the Emerald Star PlayFirst Great Chocolate Chase: A Chocolatier... Akatsuki (Limited Edition) [Japan Import] Star Wars: Force Unleashed 2 Painkiller Call... Two for Windows PC Dark Star One - Broken Alliance - Xbox 360 Train... Aoi Kyojin [Japan Import] Dark Star One (Dvd Style Box) SKU-PAS1067481... - Nintendo Wii The Guild 2: Venice Star Wars Fan Favourites 1&2 - Republic Comando...) 6 Laptop Games Star Trek Online Collectors Edition - PC Star Trek Star Fleet Command... (PlayStation3 the Best) [Japan Import] Star Wars Episode 1 Collection Castlevania: Lords... Faction Pack Red Baron DARK STAR ONE (dvd style box) Advanced Brain...



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... transmissions from the Geostationary Orbit. One is the Space Network List... column gives the name, or one of the names, of the satellite. The last but one column shows the observed longitude...-1F/M STATSIONAR-D4 VOLNA-3 EUROPE*STAR-1 STATSIONAR-9 STATSIONAR-9A GALS-2 F-SATDAB... SYRACUSE-3H SYRACUSE-31H EUROPE*STAR-3 INSAT-2T(48) INSAT-2(48... end 2010 Dec 2011 Europe*Star 1=Intelsat12 45.00E Dec 2011... USA JCSAT-FO-132E D-STAR-1 N-STAR-A N-STAR-A2 VINASAT-4A2 N-STAR-F VINASAT-4A3 VINASAT... AP-2 JCSAT-FO-136E D-STAR-2 N-STAR-B N-STAR-B2 N-STAR-E APSTAR 5-KU CHINASAT-138E TONGASAT....98E Dec 2011 2002-035B N-Star 3 (N-Star c) 136.03E Dec 2011 2004...-044A Palapa C2, i=1.55 Optus D2 150.51E 152.06E Dec....00 W USA TDRS WEST STATSIONAR-D2 VOLNA-7 TOR-5M STATSIONAR-10...-25A USASAT-25A-1 2008-018B Star One C2 70.02W Dec 2011....98W Dec 2011 2007-056A Star One C1 65.01W 2004-091A... sat No sat RUS STATSIONAR-D2 No sat No sat No... sat No sat RUS STATSIONAR-D2-30B No sat No sat...



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... dr. M. Méndez CONTENTS 1 Introduction 9 1.1 Neutron star formation 9 1.2 Structure 10 1.3 Manifestations 11... temperatures, like in the neutron star core, is currently poorly constrained... studied topic. However, the neutron star itself and its diverse phenomena... accrete matter from a binary companion star. In this chapter we introduce... accreting neutron stars. 1.1 neutron star formation A neutron star (first suggested by Landau... forms a neutron star (e.g., Heger et al. 2003). Alternatively, a neutron star can be... Figure 1.1: Schematic structure of a neutron star. Indicated are the thickness of... at their boundaries, for a 1.4 M⊙ neutron star with a 10 km radius. energy... into a neutron star (Nomoto & Kondo 1991). 1.2 structure A neutron star consists of several...). If the neutron star accretes from a binary companion star, the atmosphere consists... birth in a supernova, the neutron star presumably cools down from surface... collapse which forms the neutron star, conservation of angular momentum causes... synchrotron radiation. As the neutron star rotates, such a beam can periodically... the mass of the companion star one speaks of a high- or low... be accreted from the companion star through Roche-lobe overflow, forming... accretion disk around the neutron star (Fig. 1.2). Because of the high surface gravity of the neutron star of gsurface ≃ 2 · 1014 cm s−2 , the... different elements can vary from star to star. A subset of LMXBs are known to have binary periods of one... the Eddington limit. For a 1.4 M⊙ neutron star, the Eddington-limited accre˙ Edd... accretion stream hits the neutron star surface (Wijnands & van der Klis... hydrogen/helium flash (assuming a neutron star mass of 1.4 M⊙ with a 10 km... rotational velocity than the neutron star itself, the angular momentum is transported throughout the star, creating differential rotation. The latter... envelope of an accreting neutron star. For the first time differential... fuel for superbursts on neutron star surfaces. However, all known superbursters... from a sub-solar mass companion star. The gravitational energy that is... accreted layer and the neutron star crust (Cumming & Bildsten 2001, Strohmayer... as a probe of the neutron star interior (Brown 2004; Cooper & Narayan... optical light of the companion star without contamination by optical light... (2004) for hydrogen accreting neutron star. h From Paizis et al. (2003... of a canonical neutron star (i.e. LEdd ≡ 2 · 1038erg s−1 for a neutron star with a mass of... ignition column depth y for a 1.4 M⊙ neutron star with a 10 km radius, assuming... better constrain models of neutron star interior physics, more long term... superburst from a transiently accreting neutron star system with the All-Sky... the elements in the neutron star envelope may significantly influence the.... The accretion onto the neutron star is transient (Lochner & RousselDupre 1994... M for a canonical hydrogen-accreting neutron star with a mass of 1.4 M⊙ , ˙ M ˙ Edd = F/FEdd... the Eddington limit assuming a 1.4 M neutron star. ⊙ b 48 superburst from a low-mass... across the neutron star surface, such that on one part of the... observed from a transiently accreting neutron star in a low-mass X-ray binary... accretion rate onto the neutron star, is about 1% of Eddington, which..., and occulted by the companion star, respectively, at every orbital period... neutron star via accretion between the preceding burst and the considered one... distributions (P same D2−T3 = 4.5%, P T2−T3 = 3.6%), to follow a marginally different one (P same... T3 types on one hand, and for S1, D1, D2, T2 and... or composition of the neutron star atmosphere/outer layers (see Sect... physical radius of the neutron star (e.g. London et al., 1984). Using... and composition of the neutron star outer layers or atmosphere which... the neutron star (e.g. London et al., 1984). The latter one was estimated... they come from the neutron star surface (during bursts). Using i ≈ 75... s 1 for a 1.4 M⊙ , 10 km neutron luminosity M star (models zM and ZM of... S1 D1 D2 D1 D2 (T2) (T3) (D2) (D1, T1) (D2, T3) (D2) (D2) (D2) 4.A light curves.../or helium accreted by a neutron star from a binary companion may undergo... (LMXBs) accrete matter from a companion star through Roche-lobe overflow. Due... stars before reaching the neutron star surface. The companion is typically a main sequence star, donating matter with a large hydrogen... quickly spread over the neutron star surface, forming a thin layer. When... M 10−2 M cretion rates (assuming a neutron star mass of 1.4M⊙ with a 10... rotation rate of the neutron star, Ω, ˙ st ∝ Ω0.62 . For neutron stars... a one-dimensional multi-zone model of the outer layers of a neutron star... burning. 5.2.1 Grid The one-dimensional grid divides the star in shells with... higher temperatures of the neutron star envelope, which depends highly on... absorption lines from the neutron star. Measuring the gravitational redshift of... accreted helium in the neutron star envelope using an extensive numerical..., P. G. Jonker 2008, The cold neutron star in the long-duration transient...



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... as transmission of information on one hand and a satellite as a solid... are known under more than one name. The last column shows... in the 23 years 19852007. One satellite, ATS 3, survives from 1967... been computed by P. Lála10. ,from one or more orbital elements determined... the fact that more than one space network can be operated on one satellite, There are also cases... EUROPE*STAR-1 52-57 ● 2000-068A Europe*Star F-1 45.00 E C1 EUROPE*STAR... E C1 ZOHREH-3 52, 57 EUROPE*STAR-3 52-57 1991-075A Intelsat... F-1, i=3.11 47.54 E C2 EUROPE*STAR-3B (BSS) Mainly international phone... AP-2 TONGASAT C/KU-2 CS-3B N-STAR-B APSTAR-5-KU TONGASAT AP-3 TONGASAT...-57 33-77 2002-035B N-Star 3 = N Star c 135.95 E C1 37-79... 53-57 2007-044A Optus D2 152.08 E C1 AUSSAT A 152E... 43, 47 STATSIONAR-D2 47, 48 STATSIONAR-D2-30B 43 STATSIONAR-M1... MERCOSUL 49, 50 2008-018B Star One C2 70.05W 27 Services...-84 43, 47 ● 2007-056A Star One C1 64.98W 43, 47...



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....00 E STATSIONAR-D4 VOLNA-3 EUROPE*STAR-1, 2000-068A EUROPESTAR-45E EUROPESTAR... 2 Astra 1F 44.5 E 44.3 E Europe*Star F1=Intelsat12 45.0 E PROGNOZ-3 STATSIONAR... SYRACUSE-31H SYRACUSE-4H EUROPE*STAR-3, EUROPESTAR-47.5E EUROPESTAR-47... BSAT-110 N-SAT-110E JMCS-D2-X JMCS-2 CHINASAT-6 SINOSAT-5 CHINASAT-2 DFH...-132E D-STAR-1 VINASAT-4A2 N-STAR-F N-SAT-M-132E VINASAT-TTC N-STAR-A C/KU-2 TONGASAT N-STAR-A2...-C/KU-2 APST5AR-2 CHINASAT-134E D-STAR-2 N-STAR-B N-STAR-B2 N-STAR-E JCSAT-FO-136E APSTAR 5-KU...-12A Apstar 6 134.0 E 2002-035B N-Star C, i=2.9 136.0E 2004-024A Telstar... 2007-044A Asiasat 3S Optus D2 150.5 E 152.0 E 2002-015A 2015... INTELSAT7 183E NSS-19 STATSIONAR-D2 TDRS 174 W TDRS WEST TOR... EchoStar 1 EchoStar 8 QuetzSat-1 Intelwsat 16 Star One C3 78.0 W 77.2 W 76.9 W 77...-034B Nimiq 5 GE 6, AMC-6 Arsat 1 Star One C2 Star One C4 72.7 W 72.0 W 71...-056A GE 4, AMC-4 AMC-3, GE-3 Star One C 1 67.0 W 67.0 W 65.0 W 1995-016A...



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... Vehicles AMC-12 (Astra-4A, Star One-C12) Development Agency Launch Launch... successfully launched three Anik-A satellites, one Anik-B satellite, three Anik-C satellites... services. Third generation, comprising of one satellite (Arabsat-3A), further enhanced...-3 series and Astra-4 series have one operational satellite each namely Astra...-B1, -B2, -B3 and -B4. Star One company is formed by partnership...). Star One-C1, -C2 and -C12 satellites represent Star One’s third generation satellites. Star One-C1...-12 satellites are operated by Star One as Star One C12. Brasilsat-B1, -B2... comprise of CS-1 series with one satellite named CS-1 (Sakura-1), CS...) Europe*Star series Europe*Star series of satellites comprises of Europe*Star-1 and Europestar-B. Europe*Star... and South East Asia. Europe*Star-B provides point-to-point connections... Europe. In July 2005, Europe*Star-1 satellite was sold to Panamsat... 12 in February 2007. Europe*Star-1 (PAS-12) Development Agency Launch... Europe*Star-B Koreasat-1 satellite was sold to Europe*Star as Europe*Star-B. Eutelsat... -AM44 satellites have been launched. One satellite in Ekspress-MD series... versions of Gonets-D1 satellites. One satellite, Gonets-D1M 1 has been... Reaction Control Thrusters, Fast Recovery Star Sensors and Heat Pipe Radiator... Space Center (SHAR), India : GSLV-D2 : GEO 48°E : 1800 kg : 4 C-Band... concept of using geostationary satellites. One geostationary satellite ICO-G1 has... Research Organization (ISRO), INSAT is one of the largest domestic communication... of five Luch satellites and one Luch-2 satellite. Last Luch satellite... of three (two operational and one spare) satellites. Two generation of... 21, 2000 as part of a one-year technology validation/ demonstration mission... world to have resolution of one meter. Launch of first satellite... of Ikonos-1. The resolution of one meter helps them to distinguish..., 1985, 1994 and 1998 respectively. One satellite has been launched in... Advanced Components (ICARE) experiment, Italian Star Tracker (IST), Whale Tracker Experiment.... All the three satellites have one downlink and five uplink channels... channels in the L-band and one downlink and two uplink channels... launched in the near future. One satellite, Meteor-M 1, of the Meteor... Ion Drift Meter (DIDM), Electrostatic STAR Accelerometer, GPS Receiver TRSR-2, Advanced... Oscillator (USO), SuperSTAR Accelorometers (ACC), Star Camera Assembly (SCA), Coarse Earth... stabilization : One Experimental Communication Payload, one Ocean Color Imager (OCI) and one Ionospheric... the John Hopkins University. Only one previous mission, Copernicus, has operated... and probe the causes of star formation and its evolution over... (Discovery-5) Genesis (Fig.131) is one of NASA’s Discovery program missions... Space and Astronautical Science (ISAS), one of the predecessor bodies of... of outflows and estimates of star formation 162 Compendium of Satellites... Lunar Prospector (Fig.149) is one of NASA’s Discovery mission satellite... observations will take place over one Martian year after which the... Operational lifetime : Design life of one Martian year MESSENGER (MERrcury Surface... Super High Frequency (SHF) transponders, one special purpose single channel transponder... High Frequency (SHF) transponders and one special purpose single channel transponder... military communication satellites. Potok was one element of the second generation... helices, one Transmit and one Receive), two X-band horns (one beacon, one receive), 12...-8, -9, 10) and Block-4 comprising of one satellite (UFO-11). UFO -4, -5, -6, -7 (UHF...-IIR satellites had been launched. One of the potential advantages of... life of 5 years Helios-2 series One satellite (Helios-2A) has been.... It was capable of launching one satellite or two small satellites... the U.S. Air Force. Atlas became one of the most important boosters... (solid strap-on motors) +stage 3 (star 37FM) : 155 000 kg : Cape... (solid strap-on motors) +stage 3 (star 48B) Launch mass : 171 420... (solid strap-on motors) +stage 3 (star 37FM) Launch mass : 171 420... (solid strap-on motors) +stage 3 (star 48B) Launch mass : 231 670... (solid strap-on motors) +stage 3 (star 48B) Launch mass : 231 670... (1 stage YF 6 liquid engine) + (2 stage one F-22 and a YF-23 swiveling... (1 stage YF 6 liquid engine) + (2 stage one F-22 and a YF-23 swiveling... engines and 3 stage comprising of one liquid engine. Proton-K Block-D and.... Start-1, a four stage vehicle, is one of the smallest launch vehicles... orbit. Taurus-3210 has undergone one launch mission. Taurus-XLS, the...-II (23)G Star-37S-ISS and Titan-II (23)G Star-37XFP-ISS...-II (23)G Star-37S-ISS and Titan-II (23)G Star-37XFP-ISS...-II (23)G Star-37S-ISS and Titan-II (23)G Star-37XFP-ISS... California, USA Titan-II (23)G Star-37XFP-ISS Configuration Launch Site...) + 2nd stage (LR91) + 3 rd stage (Star 37S/ISS)) : Vandenberg Air Force... California, USA Titan-II (23)G Star-37S-ISS Configuration Launch Site...) + 2nd stage (LR91) + 3 rd stage (Star 37XFP/ISS)) : Vandenberg Air Force...-D1T, Titan-3E Centaur-D1T Star-37E, Titan-34D, Titan- 230...



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... FC030021 (D2) (E1) (D1) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D1) (D2) (D2) (D2) (D2) (C1) (B1) (D2) (D2) (K1) (D2) (D2) (D1) (D2) (D2) (D2) (D2) (D2) (D2) (D1) (D2) (D2) (D2) (D2) (D2) (D2) (D1... SC003721 (D1) (D2) (D2) (D2) (D2) (D1) (D2) (D2) (D1) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D1) (D1) (E1) (E1) (D2) (D2) (D2) (D2) (D2) (D2) (G3) 24...) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D1) (D2) (D2) (D2) (D2) (D2) (D2) (C1) (B1) (D2) (D2) (D1) (D1) (B1) (C1) (D2) (D2) (B1) (C1) (D2) (D2) (D2) (D2) (D1) (D2) (D2) (D2) (D2... (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D1) (D1) (D1) (D1) (D2) (D2) (D2) (D2) (D2) (D2) (D1) (D1) (D2) (D2) (D2) (D2) (D2) (D2) (C3) (C3) (C3) (D2) (D2) (D1) (D2) (D2) (D1) (D1) (D2) (D2) (D1) (D2) (D2) (D2) (D2) (D2) (D2) (D2) 22... (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D1) (D2) (D2) (B1) (C1) (C2) (C2) (C1) (B1) (D2) (D2) (D1) (D2) (D2) (E1) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D1) (D1) (D2) (D2) (D2) (D2) (D2) (D2) (C2) (D1) (D2) 21/02... SC478746 SC498146 (D2) (D2) (D2) (D2) (D1) (D2) (D2) (C2) (C2) (C2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D1) (D2) (D2) (D1) (D2) (D2) (D2) (D2) (D2) (D2) (C3) (D2) (D2) (C3...) (D2) (D2) (D2) (D2) (D1) (D2) (D2) (D2) (D2) (D1) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (B4) (B2) (B4) (D2) (D2) (D1) (D1) (K5) (D1) (D2) (D2) (D2) (D2) (D2) (D2) (B1) (C1) (D2) (D2) (D2) (D2... (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D1) (D1) (D1) (D2) (C3) (C3) (D2) (C3) (C3) (D1) (D1) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D1) (D2) (D2) (D2) (D2) (D2) (D2) (K1) (E1) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D1) (D2) (D2...) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (E1) (D2) (D2) (D2) (B1) (C1) (D2) (D2) (D2) (D2) (C1) (B1) (D2) (D2) (D2) (D2) (C3) (D2) (D2) (D1) (C1) (B1) (D2) (D2) (D2) (D1) (D2... SC527692 SC420936 (D1) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (E1) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (E1) (D2) (D2) (C2) (C2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (C3) (C1) (B1... SC493011 SC339110 (D2) (D2) (D2) (D2) (D2) (D2) (D1) (D1) (D1) (D2) (D2) (D2) (D2) (D2) (D2) (D1) (D2) (D2) (D1) (D2) (D2) (C2) (D2) (D2) (D1) (D2) (D2) (D2) (D2) (D2) (D2) (C3) (C3) (C3) (C3) (D2) (D2) (D2) (D2) (D1) (D2) (D2) (D2) (D2) (D1...) (D2) (D2) (D2) (D2) (D2) (D2) (E1) (C2) (C1) (B1) (D2) (D2) (D1) (D2) (D2) (D2) (D2) (D2) (D2) (C3) (D2) (D2) (B1) (C1) (D2) (D2) (D2) (D2) (C1) (B1) (D2) (D2) (D2) (D2...) (D1) (D2) (D2) (D2) (C3) (D2) (D2) (D2) (D1) (D1) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (C3) (D2) (D2) (C1) (B1) (D1) (D2) (D2) (D2) (D1) (D2) (D2) (D2) (D1...) (D2) (D2) (D2) (D2) (D1) (D2) (D2) (B1) (C1) (C3) (D1) (D2) (D2) (C3) (D2) (D2) (C3) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (E1) (D2) (D2) (C1) (B1) (D2... SC182820 SC255006 (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D1) (D1) (D2) (D2) (D2) (D1) (D2) (D2) (D2) (D1) (D2) (D2) (D2) (D2) (D1) (D2) (D2) (C2) (D2) (D2) (D2) (D2) (D1) (D2) (D2) (D1...) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D1) (D2) (D2) (D1) (D1) (D1) (D1) (C2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D1) (C2) (D1) (D2) (D2) (D2) (D2) (D2) (D2) (D1... (D2) (D1) (D2) (D2) (D1) (D2) (D2) (D2) (D2) (D1) (D2) (D2) (D2) (D2) (D2) (D2) (B4) (B4) (B2) (D2) (D2) (D2) (D2) (D1) (D2) (D2) (C3) (D2) (D2) (D2) (D2) (D1) (C3) (D2) (D2) (C3) (D2) (D2) (D2) (D2...) (D2) (D2) (D2) (D2) (C2) (D2) (D2) (C2) (D1) (D1) (D1) (D2) (D2) (D2) (D2) (C1) (B1) (D2) (D2) (C2) (C2) (D1) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2...) (D2) (D2) (D2) (D2) (D1) (D2) (D2) (C2) (C2) (D1) (D2) (D2) (C2) (C1) (B1) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (C3) (C3) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) 23...) (D2) (D2) (D2) (D2) (D2) (D2) (D1) (E1) (D2) (D2) (D1) (D2) (D2) (D1) (B1) (C1) (D1) (D2) (D2) (D1) (D2) (D2) (D2) (D2) (D1) (E1) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2) (D2... SERVICES FIFE LTD WOK STAR ONE LIMITED WOK STAR ONE LIMITED WOLF FORMULATIONS LIMITED...



Дата загрузки: 2017-09-24
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...-Oppenheimer-Volkoff equations . . . 1.6 Outside the star: the Schwarzschild solution 1.7 The interior solution . . . . . . . . . . . . . 1.8 Maximum mass of a cold star . . . . . . . . 2 The 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 2.10 2.11 2.12 2.13... be non-thermal because the star will eventually cool. A non-thermal... degeneracy pressure). A white dwarf is a star in which gravity is balanced... converts protons into neutrons). A neutron star is supported by the degeneracy... are tiny: a solar mass neutron star would have a radius of around... star one has |Φ| ∼ 0.1 and so a Newtonian description 1 CHAPTER 1. SPHERICAL STARS is inadequate: one... mass e.g. in a supernova). Instead the star will undergo complete gravitational collapse... predicts a maximum mass for a cold star. We will make the simplifying assumption that the star is spherically symmetric. As we... any spherically symmetric star. The interior of the star can be modelled... the Schwarzschild solution outside the star. 1.2 Spherical symmetry We need to... example, the metric of a rotating star can be stationary but not.... (The gravitational field of a rotating star can be stationary but the...Ψ(r) dr2 + r2 dΩ2 (1.6) The matter inside a star can be described by a perfect... the (area-)radius of the star. Then ρ and p vanish for r > R. 1.5 Tolman... we need one more equation. We are interested in a cold star, i.e., one with... of state p = p(ρ). So, for a cold star, p is not an independent variable... fluctuation would grow. 1.6 Outside the star: the Schwarzschild solution Consider first the spacetime outside the star: r > R. We then have ρ = p = 0. For r > R (1.10... M is the mass of the star. One way to see this is.... A solution describing a static spherically symmetric star can exist only if r = 2M corresponds to a radius inside the star, where the Schwarzschild solution does... apply. Hence a static, spherically symmetric star must have a radius greater than... at r = 0 (the centre of the star). Recall that any smooth Riemannian... the total energy M of the star. The difference E − M can be interpreted... gravitational binding energy of the star. In GR there is a lower... ρc . Finally we determine Φ(r) inside the star by integrating (1.11) inwards from... of a cold star When one follows the above procedure then one finds that... mass of a cold, spherically symmetric star, which is independent of the... 8 H.S. Reall 1.8. MAXIMUM MASS OF A COLD STAR M ρ0 Figure 1.1: Plot of M against ρc for... massive hot star cannot end its life as a cold star unless it... describe the spacetime outside a spherical star. In this chapter we will...-dependent. For example, consider a spherical star that ”uses up its nuclear... dwarf or neutron star. The spacetime outside the star will be described... . We showed above that a spherical star must have radius R > 9M/4 so... from the surface of a spherical star is z = 2. Part 3 Black Holes January... the fate of a massive spherical star once it exhausts its nuclear... that the geometry outside the star is given by the Schwarzschild... even when the star is time-dependent. If the star is not... possible: nothing can prevent the star from shrinking until it reaches... corresponding the interior of the star. By continuity, points on the surface of the collapsing star will follow radial timelike curves... geodesics curvature singularity r interior of star (not Schwarzschild) Figure 2.3: Finkelstein diagram... is about 10−5 s.) Hence the star will collapse and form a curvature... an (unlucky) observer on the star’s surface. Note the behaviour of... the surface of the star. As the star’s surface approaches r = 2M , light... observer will never see the star cross r = 2M . Equation (2.3) shows that... greater than 2M . But a neutron star cannot be arbitrarily massive. It... from gravitational collapse of a normal star (since the latter cannot have...). For a normal star, this lies well inside the star, where the Schwarzschild... formed in gravitational collapse of a star have M less than about 100M... hole is formed from a normal star by gravitational collapse. But a white... to the surface of a collapsing star and then replace the region...-vacuum) spacetime corresponding to the star’s interior Part 3 Black Holes January... I interior r=0 (origin of polar of star coordinates) Figure 2.7: Kruskal diagram for... the spacetime describing a static spherical star. However, the Kruskal spacetime is... we have a spherically symmetric collapsing star then Birkhoff’s theorem Part 3 Black... same (positive) mass as the star. This gives the standard diagram... shown. This data describes a collapsing star. The initial data is geodesically... and asymptotically flat. When the star collapses to zero size, a timelike... PENROSE PROCESS metric outside a spherical star. This was a consequence of Birkhoff... describe the spacetime outside a rotating star. This solution is expected to... a static, spherically symmetric, perfect fluid star. Let Σ be the region r ≤ r0... of J a we have √ dλd2 y h Tab U a k b = δM = N = (9.29) √ dλd2 y h Tab U a ξ b − ΩH mb N √ dλd2 y h Tab U a U b κλ − ΩH N √ dλd2 y h U · L (9.30) N The...



Дата загрузки: 2017-11-24
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.../MEASAT (Malaysia) 6.9.3 SKY PerfecTV (Japan) 6.9.4 STAR TV/AsiaSat (Hong Kong, SAR... Connectivity (Star Topology with VSATs) 8.2 VSAT Star Networks 8.2.1 Applications of Star Networks 8.2.2 VSAT.... Chapter 8 reviews the uses of star and mesh VSAT networks for... as an automobile headlight or star. There are, however, a number of... services are generally lacking. The Star TV services, initiated by Hutchison... broadcasting is weak or nonexistent. Star began its operation at the... medium, where the presenter is a star on the screen. Consequently, considerable... of a particular shape (a line, square, star, or irregular shape). It is... Satellite AB (NSAB), Nahuelsat, and Star One (formerly Embratel of Brazil). The... 8 Sky One Sky PAL 9 PAL PAL Eurocrypt Eurocrypt D2-MAC D2-MAC Teleclub...-to-Home Satellite Television Broadcasting 6.9.4 STAR TV/AsiaSat (Hong Kong, SAR... Television for the Asia Region (Star TV) was formed by Hutchison... notable businessman, Li Ka Shing, Star TV remains the best model.... AsiaSat, the satellite operator serving Star TV, is based in Hong..., 1990. The satellite has allowed Star TV to begin service from... of channels, STAR went digital in 2000–2001. STAR is actually a collection... of the following channels: • • • • • • • • Star Movies; Star World; Star Sports; Channel [V] music; National... the Middle East. Consequently, the STAR services are repeated on the... centralized approach as the VSAT star network. While still in existence...-to-multipoint connectivity (also called star topology). Point-to-point connectivity... as the center of the star through which all communication passes... the outbound hub carrier in a star VSAT network, discussed later in... modem. 8.1.4 Point-to-Multipoint Connectivity (Star Topology with VSATs) The point... multipoint-to-point connectivity using a star with hub. (FDMA), or code.... Information transfer is optimized for star topology information networks, such as... Budget for a VSAT and Hub Star Network Link Component 1 Outbound Inbound... Table 8.3). As a result of the star architecture, all communication passes through... remote Earth station in the star network architecture. An example of... later in this chapter. 8.2 VSAT Star Networks Organizations employ VSATs primarily... of Hughes Network Systems.) 8.2 VSAT Star Networks 301 for existing VSATs... discussed in Section 8.1.3. 8.2.1 Applications of Star Networks Many centralized companies build... by Star VSAT Networks User Application Network Technology Internet access (one user... the varied experience with VSAT star networks in developed and developing... early adopter of the VSAT star network, extending the reach of... telephone lines, JD Group selected a star VSAT network provided through a shared... based on equipment characteristics 8.2 VSAT Star Networks 305 rather than antenna... architecture of the typical VSAT star network is provided in Figure... station and remote VSAT in a star network for corporate data communications... most common implementations of the star network use TDM on the... on the requirements of 8.2 VSAT Star Networks 307 the customer. Generally...) Hub equipment Psi Interface VSAT Star Networks Interface 8.2 Pso Satellite link... public and private networks 8.2 VSAT Star Networks 311 worldwide. VSATs have... of the telephone line. 8.2 VSAT Star Networks 313 After 2000, DirecPC... laser printer IBM compatible 8.2 VSAT Star Networks 315 segments at the... with a star topology; that is, the satellite network emulates a star with dedicated... may arise about how this star network might support applications that... by a core router. Hence, the star VSAT network emulates the operation... is entirely possible that VSAT star networks might become capable of... data communications, through a star topology. While the star is the most popular... are starting with an existing star network, there would already be... and server computer over a VSAT star network. This is at a high... and response time in a VSAT star network. or TDMA. The amount... basic technology of the VSAT star network exists on a foundation of... outbound and inbound transmissions in a star VSAT network. The outbound carrier... least one company, Shiron Satellite Communications, offers an SCPC star system for... can also be arranged in a star network, hubbed on a common teleport... in Figure 9.9 for a typical VSAT star network employing the slotted ALOHA..., the network is forced into a star topology, which is consistent with... Networks • • • The network is clearly a star topology, where there is a central... on the proper sizing of star VSAT networks. Before this activity... the central point of the star network, the hub coordinates all... antenna is well established. The star topology incorporates the hub to... network lifetime. Users of VSAT star networks have two avenues open... networks to date employ the star architecture to provide effective networks... what is possible with VSAT star networks (covered in Chapter 9). The... is similar to the VSAT star, with outbound control channels between... Spectrum allocations, 9 Stairstep signal, 155 Star networks, 300–316 applications, 301...