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HS-376
The Boeing 376 (sometimes referred to as the BSS-376, and previously as the HS-376) is a communications satellite bus introduced in 1978 by Hughes Space and Communications Company. It was a spin-stabilized bus that the manufacturer claims was the first standardized platform. Design The satellite bus was designed and manufactured by Hughes. This spin-stabilized platform had two main sections. The spinning section was kept rotating at 50 rpm to maintain attitude, and a despun section was used by the payload to maintain radio coverage. The spinning section included the apogee kick motor, most of the attitude control, the power subsystem and the command and telemetry subsystems. The despun section contained the communications payload, including the antennas and transponders. The stock version had a launch mass of , a mass of after reaching geostationary orbit and an 8 to 10-year design life. When stowed for launch, its dimensions were in height and in diameter. With its sol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HS-393
The Hughes 393 (sometimes referred to as the HS-393) is a communications satellite bus introduced in 1985 by Hughes Space and Communications Company. It was a spin-stabilized bus that had twice as much power as the HS-376 platform. Design The satellite bus was designed and manufactured by Hughes. It had a launch mass of , a mass of after reaching geostationary orbit, and an 8-year design life. When stowed for launch, its dimensions were in height and in diameter. With its solar panels fully extended its height was . Its power system generated approximately 2,350 watts of power at beginning of life and 2,200 at end of life, thanks to two cylindrical solar panels. These panels used K7 and K4-3/4 solar cells, with more than twice the number of cells than on the HS-376. The bottom panel was retracted around the body and top panel for launch, and extended downwards for operation. It also had two 38 Ah NiH2 batteries. Its propulsion system was composed of two R-4D liquid ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SBS 2 (satellite)
SBS 2 was a geostationary communications satellite designed and manufactured by Hughes (now Boeing) on the HS-376 platform. It was ordered by Satellite Business Systems, which later sold it to Hughes Communications. It had a Ku band payload and operated on the 117°W longitude. Satellite description The spacecraft was designed and manufactured by Hughes on the HS-376 satellite bus. It had a launch mass of , a geostationary orbit and a 7-year design life. History On September 24, 1981, SDS 2 was finally launched by a Delta-3910 PAM-D from Cape Canaveral at 23:09 UTC. In April 1996, SDS 2 finally decommissioned and put on a graveyard orbit. References See also * 1981 in spaceflight The following is an outline of 1981 in spaceflight. Launches , colspan="8", January , - , colspan="8", February , - , colspan="8", March , - , co ... Communications satellites ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SBS 3 (satellite)
SBS 3 was a geostationary communications satellite designed and manufactured by Hughes (now Boeing) on the HS-376 platform. It was ordered by Satellite Business Systems, which later sold it to Hughes Communications. It had a Ku band payload and operated on the 94°W longitude. Satellite description The spacecraft was designed and manufactured by Hughes on the HS-376 satellite bus. It had a launch mass of , a geostationary orbit and a 7-year design life. History On November 11, 1982, SBS 3 was finally launched by a Space Shuttle Columbia in the mission STS-5 from Kennedy Space Center at 12:19 UTC. The satellite was launched along with the Canadian communications satellite Anik C3. On 2 June 1995, SBS 3 was finally decommissioned and put on a graveyard orbit A graveyard orbit, also called a junk orbit or disposal orbit, is an orbit that lies away from common operational orbits. One significant graveyard orbit is a supersynchronous orbit well beyond geosynchronous or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SBS 1
SBS 1 was a geostationary communications satellite designed and manufactured by Hughes (now Boeing) on the HS-376 platform. It was ordered by Satellite Business Systems, which later sold it to Hughes Communications. It had a Ku band payload and operated on the 149°W longitude. Satellite description The spacecraft was designed and manufactured by Hughes on the HS-376 satellite bus. It had a launch mass of , a geostationary orbit and a 7-year design life. History On November 15, 1980, SBS 1 was launched by a Delta-3910 PAM-D from Cape Canaveral at 22:49 UTC. In June 1990, SBS 1 was finally decommissioned and put into a graveyard orbit. References See also * 1980 in spaceflight The following is an outline of 1980 in spaceflight. Launches , colspan="8", January , - , colspan="8", February , - , colspan="8", March , - , colspan="8", April , - , colspan="8", Ma ... Communications satellites 1980 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Galaxy 1
Galaxy 1 was the first in a line of Galaxy communications satellites launched by Hughes Communications in 1983. It helped fill a hole in satellite broadcasting bandwidth created by the loss of RCA's Satcom 3 in 1979. Unlike satellite owners RCA and Western Union, Hughes did not lease time on their transponders in the fashion of a common carrier, but instead sold transponders outright to content providers. This created a stable lineup of content attractive enough for cable providers to dedicate Earth station receivers to it full-time. Among the services on Galaxy 1 by mid-1984: HBO, Cinemax, The Movie Channel, Showtime, The Disney Channel, TBS, CNN, ESPN, and The Nashville Network. Retirement of Galaxy 1 In 1992, Galaxy 1 was replaced by Galaxy 5 as the predominant cable television signal carrier, when a majority of satellite television services were relocated onto that satellite. It was originally slated for retirement in 1992 and replacement by Galaxy 1R, but the re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eutelsat 31A
Eutelsat 31A, formerly e-Bird, Eurobird 3 and Eutelsat 33A, is a communications satellite that offers capacity for broadband and broadcast services in Europe. It is owned by Eutelsat. Positioned at 31° East - having been relocated from 33° East in May 2014 - Eutelsat 31A is optimised for interactive broadband services, and also valued by broadcasters for occasional use and professional video services, and data networks like Estar by Technologie Satelitarne Technologie Satelitarne is a satellite Internet service provider from Poland. The project offered by Technologie Satelitarne is broadband Internet access in areas with poor telecommunications infrastructure. They offer two-way Ku band broadband sat ... service. Its 20 Ku band transponders are connected to four spot beams over Europe and Turkey. These four beams overlap to allow hubs located in the hot spots of each beam to communicate with each other, thus ensuring highly effective pan-European coverage. References ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boeing 601
The Boeing 601 (sometimes referred to as the BSS-601, and previously as the HS-601) is a communications satellite bus designed in 1985 and introduced in 1987 by Hughes Space and Communications Company. The series was extremely popular in the 1990s, with more than 84 purchased by customers globally. The more advanced 601HP derivative (for "high power") was introduced in 1995. Hughes, and the 601 platforms, were acquired by Boeing in 2000. The last commercial 601 satellite was ordered in 2001 and launched in 2004. The NASA Space Communications and Navigation (SCaN) Program Office in December 2007 selected the BSS-601HP for its third generation TDRS spacecraft, adding the two 15-foot (4.5m) diameter steerable antennas. The TDRS-M satellite, launched on August 18, 2017, became the last 601 satellite to reach orbit. Background The Boeing-601 model was Hughes’ first major design and development for a communications satellite with three-axis, or body stabilization. All previous Hug ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Westar 5
Westar was a fleet of geosynchronous communications satellites operating in the C band which were launched by Western Union from 1974 to 1984. There were seven Westar satellites in all, with five of them launched and operating under the Westar name. Background Westar 1 (launched on April 13, 1974) has the distinction of being the USA's first commercially launched geosynchronous communications satellite, following North America's first geosynchronous communications satellite, Canada's Anik A1 in 1972. Westar 1 was put into orbit at 99° W in the Clarke belt (99° W now being the home of Galaxy 16). Westar 2 was launched shortly afterward on October 10, 1974. Westar 3, the first satellite to use TDMA switched data, was launched on August 10, 1979. Westars 1, 2 and 3 were built by Hughes using the HS 333 platform of spin-scan stabilized satellites. They only had 12 transponders on board, as opposed to later C-band communications satellites having 24, and even contem ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Westar 4
Westar was a fleet of geosynchronous communications satellites operating in the C band which were launched by Western Union from 1974 to 1984. There were seven Westar satellites in all, with five of them launched and operating under the Westar name. Background Westar 1 (launched on April 13, 1974) has the distinction of being the USA's first commercially launched geosynchronous communications satellite, following North America's first geosynchronous communications satellite, Canada's Anik A1 in 1972. Westar 1 was put into orbit at 99° W in the Clarke belt (99° W now being the home of Galaxy 16). Westar 2 was launched shortly afterward on October 10, 1974. Westar 3, the first satellite to use TDMA switched data, was launched on August 10, 1979. Westars 1, 2 and 3 were built by Hughes using the HS 333 platform of spin-scan stabilized satellites. They only had 12 transponders on board, as opposed to later C-band communications satellites having 24, and even contem ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boeing Satellite Development Center
The Boeing Satellite Development Center is a major business unit of Boeing Defense, Space & Security. It brought together Boeing satellite operations with that of GM Hughes Electronics' Space and Communications division in El Segundo, California. History The facility was originally built by Nash Motors in 1946 and begun production in 1948, building the Nash Rambler. Howard Hughes' Hughes Aircraft Company formed the Aerospace Group within the company when they bought the facility in 1955, when the Nash company became American Motors Corporation and divided the facility into: * Hughes Space and Communications Group * Hughes Space Systems Division In 1953, the Howard Hughes Medical Institute (HHMI) was formed, and Hughes Aircraft reformed as a subsidiary of the foundation. The charity status of the foundation allowed Hughes Aircraft to avoid taxes on its huge income. In 1961, the two Aerospace Group divisions were reformed as Hughes Space and Communications Company. Hughes S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Satellite Bus
A satellite bus (or spacecraft bus) is the main body and structural component of a satellite or spacecraft, in which the payload and all scientific instruments are held. Bus-derived satellites are opposed to specially produced satellites. Bus-derived satellites are usually customized to customer requirements, for example with specialized sensors or transponders, in order to achieve a specific mission. They are commonly used for geosynchronous satellites, particularly communications satellites, but are also used in spacecraft which occupy lower orbits, occasionally including low Earth orbit missions. Examples Some satellite bus examples include: * Boeing DS&S 702 * Lockheed Martin Space Systems A2100 * Alphabus * INVAP ARSAT-3K * Airbus D&S Eurostar * ISRO's I-1K, I-2K, I-3K, I-4K, I-6K, and Indian Mini Satellite bus * NASA Ames MCSB * SSL 1300 * Orbital ATK GEOStar * Mitsubishi Electric DS2000 * Spacecraft bus of the James Webb Space Telescope * SPUTNIX TabletSat * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
PAM-D
The Payload Assist Module (PAM) is a modular upper stage designed and built by McDonnell Douglas (now Boeing), using Thiokol Star-series solid propellant rocket motors. The PAM was used with the Space Shuttle, Delta, and Titan launchers and carried satellites from low Earth orbit to a geostationary transfer orbit or an interplanetary course. The payload was spin stabilized by being mounted on a rotating plate. Originally developed for the Space Shuttle, different versions of the PAM were developed: * PAM-A (Atlas class), development terminated; originally to be used on both the Atlas and Space Shuttle * PAM-D (Delta class), uses a Star-48B rocket motor * PAM-DII (Delta class), uses a Star-63 rocket motor * PAM-S (Special) as a kick motor for the space probe ''Ulysses'' The PAM-D module, used as the third stage of the Delta II rocket, was the last version in use. As of 2018, no PAM is in active use on any rockets. 2001 re-entry incident On January 12, 2001, a PAM-D module re-en ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
