| 词条 | Brasilsat B1 |
| 释义 |
| name = Brasilsat B1 | image = | image_caption = Brasilsat B1 in orbit. | mission_type = Telecommunications | operator = Embratel | website = | COSPAR_ID = 1994-049A | SATCAT = 23199 | mission_duration = 12 years | spacecraft_bus = HS-376 | manufacturer = Hughes | dry_mass = | launch_mass = {{convert|1760|kg}} | power = 1,650 watts | launch_date = {{start-date|August 10, 1994}} at 23:05:00 UTC | launch_rocket = Ariane 44 LP V66 | launch_site = Kourou ELA-2 | launch_contractor = Arianespace | entered_service = | disposal_type = | deactivated = | orbit_epoch = | orbit_reference = Geocentric | orbit_regime = Geostationary | orbit_periapsis = {{convert|36044.8|km}} | orbit_apoapsis = {{convert|36118.9|km}} | orbit_inclination = 5.7 degrees{{citation needed|date=September 2013}} | orbit_period = 1,450 minutes | orbit_longitude = (first position): 70° West (current position): 68° West{{when|date=September 2013}} | orbit_slot = | apsis = gee | trans_band = | trans_frequency = 3625 - 4200 MHz | trans_bandwidth = | trans_capacity = | trans_coverage = | trans_TWTA = | trans_EIRP = | trans_HPBW = }} Brasilsat B1 is a Brazilian communications satellite launched on August 10, 1994, by an Ariane rocket model 44L at Guiana Space Centre which is located in Kourou, French Guiana. HistoryIt was constructed by the United States and Brazil and is classified as a second generation satellite. It is larger and more powerful than the previous generation of satellites. The Boeing Company (which chose to expand its presence in another aerospace field of satellite communications by purchasing Hughes Electronics Corporation, the builder of Brasilsat B1 and B2) contracted the acquisition of three satellites from Hughes. As part of the contract, Hughes would divide the work with Promon Engenharia SA of São Paulo. Brasilsat B1 and B2 were tested by the Institute of Space Research - INPE of São José dos Campos, Brasilsat B3 and B4 were tested in the Hughes laboratories. The contract also included renovation of sensor equipment and telemetry, provided by Guaratiba Center for Satellite Signaling, located in Rio de Janeiro, as well as automation and installation of security equipment in the Tanguá Control Station. Current statusIn March 2007, Brasilsat B1 was moved from its former orbital position at 70.0°W to 68.0°W and replaced by Brasilsat B4. On June 2, 2008 Brasilsat B4 was moved from its new position to 84.0°W and replaced at 70.0°W by Star One C2. Brasilsat B3 is currently at 75.0°W. Of the four Brasilsat satellites, only B3 and B4 are currently transmitting signals.{{When|date=February 2011}} Main Characteristics
External links{{Portal|Spaceflight}}
3 : Communications satellites in geostationary orbit|Spacecraft launched in 1994|Satellites using the HS-376 bus |
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