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601HP
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] |
TDRS-M
TDRS-13, known before launch as TDRS-M, is an American communications satellite operated by NASA as part of the Tracking and Data Relay Satellite System. The thirteenth Tracking and Data Relay Satellite, it is the third and final third-generation spacecraft to be launched, following the 2014 launch of TDRS-12. Spacecraft TDRS-M was constructed by Boeing, based on the BSS-601HP satellite bus. Fully fueled, it has a mass of , with a design life of 15 years. It carries two steerable antennas capable of providing S, Ku and Ka band communications for other spacecraft, with an additional array of S-band transponders for lower-rate communications with five further satellites. The satellite is powered by two solar arrays, which produce 2.8 to 3.2 kilowatts of power, while an R-4D-11-300 engine is present to provide propulsion. Launch In 2015, NASA contracted with United Launch Alliance to launch TDRS-M on an Atlas V 401 for $132.4 million. The spacecraft was launched on 18 Augus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AsiaSat 4
AsiaSat 4 was a Hong Kong communications satellite, which was owned, and was initially operated, by the Hong Kong based AsiaSat, Asia Satellite Telecommunications Company (AsiaSat). It was positioned in geostationary orbit at a longitude of 122° East of the Prime meridian (Greenwich), Greenwich Meridian. It spent most of its operational life at 122° East, from where it was used to provide fixed satellite services, including broadcasting, audio and data transmission, to Asia and the Pacific Ocean. Satellite description AsiaSat 4 was built by Hughes Space and Communications, for US$220 million, which by the time of its launch had become part of Boeing Satellite Development Center, Boeing Satellite Systems. It is based on the Boeing 601 , HS-601HP satellite bus. At launch, it had a mass of , and a design life of fifteen years. It carries twenty eight C band (IEEE), C-band and twenty Ku band, Ku-band Transponder (satellite communications), transponders. It was planned for late 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AsiaSat 3S
AsiaSat 3S, was a geosynchronous communications satellite for AsiaSat of Hong Kong to provide communications and television services all across Asia, the Middle East and Oceania Oceania (, , ) is a region, geographical region that includes Australasia, Melanesia, Micronesia, and Polynesia. Spanning the Eastern Hemisphere, Eastern and Western Hemisphere, Western hemispheres, Oceania is estimated to have a land area of .... Background In March 1998, AsiaSat ordered a replacement satellite, for US$195 million, from Hughes Space and Communications. Designated AsiaSat 3S, the new satellite is a replica of PAS-22, AsiaSat 3. Launch AsiaSat 3S was launched for AsiaSat by a Proton-K / Blok D, DM-2M launch vehicle on 21 March 1999, at 00:09:30 Coordinated Universal Time, UTC, destined for an orbital location at 105.5° East. A replacement for Asiasat 3, placed in the wrong orbit by a Proton launch in 1997, Asiasat 3S carried C band (IEEE), C-band and Ku band, Ku-band Transpon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solar Array
A photovoltaic system, also PV system or solar power system, is an electric power system designed to supply usable solar power by means of photovoltaics. It consists of an arrangement of several components, including solar panels to absorb and convert sunlight into electricity, a solar inverter to convert the output from direct to alternating current, as well as mounting, cabling, and other electrical accessories to set up a working system. It may also use a solar tracking system to improve the system's overall performance and include an integrated battery. PV systems convert light directly into electricity, and are not to be confused with other solar technologies, such as concentrated solar power or solar thermal, used for heating and cooling. A solar array only encompasses the ensemble of solar panels, the visible part of the PV system, and does not include all the other hardware, often summarized as balance of system (BOS). PV systems range from small, rooftop-mounted or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DIRECTV 1
DirecTV (trademarked as DIRECTV) is an American multichannel video programming distributor based in El Segundo, California. Originally launched on June 17, 1994, its primary service is a digital satellite service serving the United States. It also provides traditional linear television service delivered by IP through its U-verse TV brand and a Virtual MVPD service through its DirecTV Stream brand. Its primary competitors are Dish Network, traditional cable television providers, IP-based television services, and other over-the-top video services. On July 24, 2015, after receiving approval from the Federal Communications Commission and the Department of Justice, AT&T acquired DirecTV in a transaction valued at $67.1 billion. As of the end of Q1 2021, AT&T had 15.9 million pay-TV customers, including DirecTV, U-Verse, and DirecTV Stream subscribers. On February 25, 2021, AT&T announced that it would spin-off DirecTV, U-Verse TV, and DirecTV Stream into a separate en ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
