| 词条 | SGDC-1 |
| 释义 |
| name = SGDC-1 | image = | image_caption = | insignia = | mission_type = Earth orbiter | operator = Telebrás and Viasat | website = Portal SGDC Telebras | COSPAR_ID = 2017-023B[1] | SATCAT = 42692[2] | mission_duration = 18 years (planned) | spacecraft_bus = 4000C4 | manufacturer = Thales Alenia Space | dry_mass = | launch_mass = {{convert|5735|kg|lb|abbr=on}} | dimensions = {{convert|7.10|x|2.20|x|2.0|m|ft|abbr=on}} | power = 11 kW | launch_date = {{start-date|May 4, 2017, 21:52}} UTC[3][4] | launch_rocket = Ariane 5 VA236 | launch_site = Kourou ELA-3 | launch_contractor = Arianespace | disposal_type = | deactivated = | last_contact = | decay_date = | orbit_epoch = July 8, 2018[2] | orbit_reference = Geocentric | orbit_regime = Geostationary | orbit_longitude = 73.7° W[2] | orbit_periapsis = {{convert|35,784.6|km|mi|abbr=on}}[2] | orbit_apoapsis = {{convert|35,802.6|km|mi|abbr=on}}[2] | orbit_inclination = 0.0229°[2] | orbit_semimajor = {{convert|42,164.0|km|mi|abbr=on}}[2] | orbit_eccentricity = 0.00016[2] | orbit_period = 1,436.1 minutes[2] | orbit_RAAN = 66.4545°[2] | orbit_arg_periapsis = 43.2613°[2] | orbit_mean_anomaly = 250.3095°[2] | orbit_mean_motion = 1.00272241[2] | orbit_rev_number = 436 | apsis = gee | trans_band = 50 Ka band {{nowrap|7 IEEE X-band}} | trans_frequency = | trans_bandwidth = | trans_capacity = | trans_coverage = Brazil, South Atlantic Ocean | trans_TWTA = | trans_EIRP = | trans_HPBW = }} The Geostationary Defense and Strategic Communications Satellite or SGDC (in Portuguese: Satélite Geoestacionário de Defesa e Comunicações Estratégicas) is a Brazilian geostationary communication satellite that was built by Thales Alenia Space in France, it was placed in the orbital position of 75 degrees west longitude and will be operated by Telebrás. Telebrás selected Viasat as a partner to help build the associated ground system.[5] The satellite was based on the Spacebus-4000 platform and its life expectancy will be 18 years.[6] The satellite was successfully launched into space on May 4, 2017, at 21:52 UTC, by means of an Ariane 5 vehicle from the French company Arianespace, launched from Guiana Space Centre, Kourou, French Guiana, together with the Koreasat 7.[7] It had a launch mass of 12,800 pounds (5,800 kg). The SGDC will be equipped with 50 Ka band transponders and 5 X band transponders to provide broadband internet and communications to the Brazilian government and the Brazilian Armed Forces.[8] See also{{Portal|Spaceflight}}
References1. ^{{cite web |url=https://nssdc.gsfc.nasa.gov/nmc/masterCatalog.do?sc=2017-023B |title=SGDC |work=NSSDC Master Catalog |last=NASA |first=Goddard Space Flight Center |date=14 May 2017 |accessdate=14 May 2017}} {{Use British English|date=December 2016}}{{Brazil space program}}{{Orbital launches in 2017}}{{Brazil-spacecraft-stub}}2. ^1 2 3 4 5 6 7 8 9 10 11 12 {{cite web |url=http://www.n2yo.com/satellite/?s=42692 |title=SGDC |last=n2yo.com |date=July 8, 2018 |accessdate=July 8, 2018}} 3. ^{{cite web |url=http://spaceflightnow.com/launch-schedule/ |title=Launch schedule |work=Spaceflight Now |last=Clark |first=Stephen |date=10 January 2017 |accessdate=11 January 2017}} 4. ^{{cite web |url=http://space.skyrocket.de/doc_sdat/sgdc-1.htm |title=SGDC 1 |last=Gunter |first=Krebs |accessdate=May 4, 2017}} 5. ^{{cite web |url=http://investors.viasat.com/releasedetail.cfm?releaseid=1058604 |title=Telebras, Viasat Enter into Strategic Agreement to Connect the Unconnected in Brazil |last=Viasat |accessdate=March 6, 2018}} 6. ^{{cite web |url=http://space.skyrocket.de/doc_sdat/sgdc-1.htm |title=SGDC 1 |work=Gunter's Space Page |last=Gunter, Kreb's |accessdate=December 7, 2016}} 7. ^{{cite web |url=http://g1.globo.com/ciencia-e-saude/noticia/governo-lanca-satelite-que-permitira-acesso-a-banda-larga-em-areas-remotas.ghtml |title=Brasil lança satélite que permitirá acesso à banda larga em áreas remotas |work=G1, Brasília {{pt}}|date=May 4, 2017 |accessdate=May 4, 2017}} 8. ^Satélite geoestacionário vai garantir a segurança das comunicações brasileiras. {{webarchive|url=https://web.archive.org/web/20161220151030/http://www.telebras.com.br/inst/?p=5208 |date=2016-12-20 }} Telebrás {{pt}}. Retrieved 2016-12-07. 4 : 2017 in Brazil|Spacecraft launched in 2017|May 2017 events in South America|Satellites of Brazil |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。