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Sky Muster
The Sky Muster satellites are two geostationary (GEO) communications satellites operated by NBN Co Limited and built by SSL. They were launched in 2015 and 2016 to provide fast broadband in areas where NBN didn't want to either lay fiber or install enough wireless antennas and offshore. They provide download speeds of up to 25 Mbit/s, and upload speeds of 5 Mbit/s in a best-case scenario. Each Sky Muster has 101 spot beams, which are focused satellite signals which are specially concentrated in power and cover a specific geographic area. The electromagnetic Ka band spot beams are used to carry information from the end users' equipment on the ground to the satellites. Each satellite offers 80 gigabits per second of bandwidth. The two satellites will provide high-speed broadband service to 400,000 Australian homes and businesses in rural and remote Australia. The two satellites were designed to provide service for at least 15 years. Sky Muster I (NBN-Co 1A) was launched on 1 O ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Communications Satellite
A communications satellite is an artificial satellite that relays and amplifies radio telecommunication signals via a transponder; it creates a communication channel between a source transmitter and a receiver at different locations on Earth. Communications satellites are used for television, telephone, radio, internet, and military applications. Many communications satellites are in geostationary orbit above the equator, so that the satellite appears stationary at the same point in the sky; therefore the satellite dish antennas of ground stations can be aimed permanently at that spot and do not have to move to track the satellite. Others form satellite constellations in low Earth orbit, where antennas on the ground have to follow the position of the satellites and switch between satellites frequently. The high frequency radio waves used for telecommunications links travel by line of sight and so are obstructed by the curve of the Earth. The purpose of communications sate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Computerworld
''Computerworld'' (abbreviated as CW) is an ongoing decades old professional publication which in 2014 "went digital." Its audience is information technology (IT) and business technology professionals, and is available via a publication website and as a digital magazine. As a printed weekly during the 1970s and into the 1980s, ''Computerworld'' was the leading trade publication in the data processing industry. Indeed, based on circulation and revenue it was one of the most successful trade publications in any industry. Later in the 1980s it began to lose its dominant position. It is published in many countries around the world under the same or similar names. Each country's version of ''Computerworld'' includes original content and is managed independently. The parent company of Computerworld US is IDG Communications. History The first issue was published in 1967. Going international The company IDG offers the brand "Computerworld" in 47 countries worldwide, the name and fre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Satellites Of Australia
A satellite or artificial satellite is an object intentionally placed into orbit in outer space. Except for passive satellites, most satellites have an electricity generation system for equipment on board, such as solar panels or radioisotope thermoelectric generators (RTGs). Most satellites also have a method of communication to ground stations, called transponders. Many satellites use a standardized bus to save cost and work, the most popular of which is small CubeSats. Similar satellites can work together as a group, forming constellations. Because of the high launch cost to space, satellites are designed to be as lightweight and robust as possible. Most communication satellites are radio relay stations in orbit and carry dozens of transponders, each with a bandwidth of tens of megahertz. Satellites are placed from the surface to orbit by launch vehicles, high enough to avoid orbital decay by the atmosphere. Satellites can then change or maintain the orbit by propulsion, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Muster (livestock)
A muster (Au/NZ) or a roundup (US/Ca) is the process of gathering livestock. Musters usually involve cattle, sheep or horses, but may also include goats, camels, buffalo or other animals. Mustering may be conducted for a variety of reasons including routine livestock health checks and treatments, branding, shearing, lamb marking, sale, feeding and transport or droving to another location. Mustering is a long, difficult and sometimes dangerous job, especially on the vast Australian cattle stations of the Top End, 'The Falls' (gorge) country of the Great Dividing Range and the ranches of the western United States. The group of animals gathered in a muster is referred to as a "mob" in Australia and a "herd" in North America. Methods Mustering may be done on foot, with various vehicles, horses or with aircraft. Techniques in mustering cattle or sheep will depend on region, culture, distances and the type of terrain involved, and the type of animal that is being mustered. Most she ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Payload Fairing
A payload fairing is a nose cone used to protect a spacecraft payload against the impact of dynamic pressure and aerodynamic heating during launch through an atmosphere. An additional function on some flights is to maintain the cleanroom environment for precision instruments. Once outside the atmosphere the fairing is jettisoned, exposing the payload to outer space. The standard payload fairing is typically a cone-cylinder combination, due to aerodynamic considerations, although other specialized fairings are in use. The type of fairing which separates into two halves upon jettisoning is called a clamshell fairing by way of analogy to the bifurcating shell of a clam. In some cases the fairing may enclose both the payload and the upper stage of the rocket, such as on Atlas V and Proton M. If the payload is attached both to the booster's core structures and to the fairing, the payload may still be affected by the fairing's bending loads, as well as inertia loads due to vibrations ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cattle Station
In Australia and New Zealand, a cattle station is a large farm ( station is equivalent to the American ranch), the main activity of which is the rearing of cattle. The owner of a cattle station is called a '' grazier''. The largest cattle station in the world is Anna Creek Station in South Australia, which covers an area of . Improvements Each station has a homestead where the property owner or the manager lives. Nearby cottages or staff quarters provide housing for the employees. Storage sheds and cattle yards are also sited near the homestead. Other structures depend on the size and location of the station. Isolated stations will have a mechanic's workshop, schoolroom, a small general store to supply essentials, and possibly an entertainment or bar area for the owners and staff. Water may be supplied from a river, bores or dams, in conjunction with rainwater tanks. Nowadays, if rural mains power is not connected, electricity is typically provided by a generator, although sol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
School Of The Air
School of the Air is a generic term for correspondence schools catering for the primary and early secondary education of children in remote and outback Australia where some or all classes were historically conducted by radio, although this is now replaced by telephone and internet technology. In these areas, the school-age population is too small for a conventional school to be viable. History The invention of the pedal radio by Alfred Traeger around 1929, and particularly the involvement of educator Adelaide Miethke in formulating and developing the idea of using the existing Royal Flying Doctor Service of radio communications, were pivotal in the establishment of the School of the Air. The first School of the Air lessons were officially sent from the Royal Flying Doctor Service in Alice Springs on 8 June 1951. The service celebrated its 50th jubilee on 9 May 2001, ahead of the real jubilee on 8 June; and its 70th year on 8 June 2021. Each state of Australia that utilises this ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Space Systems/Loral
SSL, formerly Space Systems/Loral, LLC (SS/L), of Palo Alto, California, is a wholly owned manufacturing subsidiary of Maxar Technologies. SSL designs and builds satellites and space systems for a wide variety of government and commercial customers. Its products include high-powered direct-to-home broadcast satellites, commercial weather satellites, digital audio radio satellites, Earth observation satellites and spot-beam satellites for data networking applications. History The company was founded as the Western Development Laboratories (WDL) of Philco (Philco-Ford since 1966). The Space Systems Division was made a stand-alone Division of Aeronutronic/Ford Aerospace/ and was acquired by Loral Corp. in 1990 for $715 million from Ford Motor Company, and renamed Space Systems/Loral. All other divisions of Ford Aerospace including Western Development Labs now located in San Jose were also acquired by Loral at that time. In 2012 Space Systems/Loral was acquired by the Canadia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
145th Meridian East
The meridian 145° east of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, Asia, the Pacific Ocean, Australasia, the Indian Ocean, the Southern Ocean, and Antarctica to the South Pole. The 145th meridian east forms a great circle with the 35th meridian west. From Pole to Pole Starting at the North Pole and heading south to the South Pole, the 145th meridian east passes through: : See also *144th meridian east *146th meridian east The meridian 146° east of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, Asia, the Pacific Ocean, Australasia, the Indian Ocean, the Southern Ocean, and Antarctica to the South Pole. The 146th meridia ... References {{Use dmy dates, date=March 2017 e145 meridian east ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Equator
The equator is a circle of latitude, about in circumference, that divides Earth into the Northern and Southern hemispheres. It is an imaginary line located at 0 degrees latitude, halfway between the North and South poles. The term can also be used for any other celestial body that is roughly spherical. In spatial (3D) geometry, as applied in astronomy, the equator of a rotating spheroid (such as a planet) is the parallel (circle of latitude) at which latitude is defined to be 0°. It is an imaginary line on the spheroid, equidistant from its poles, dividing it into northern and southern hemispheres. In other words, it is the intersection of the spheroid with the plane perpendicular to its axis of rotation and midway between its geographical poles. On and near the equator (on Earth), noontime sunlight appears almost directly overhead (no more than about 23° from the zenith) every day, year-round. Consequently, the equator has a rather stable daytime temperature throug ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
140th Meridian East
The meridian 140° east of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, Asia, the Pacific Ocean, Australasia, the Indian Ocean, the Southern Ocean, and Antarctica to the South Pole. The 140th meridian east forms a great circle with the 40th meridian west. From Pole to Pole Starting at the North Pole and heading south to the South Pole, the 140th meridian east passes through: : Japan Gallery Image:40°N and 140°E Crossing Point.jpg, 40°N and 140°E Crossing Point in Ogata, Akita See also * 139th meridian east *141st meridian east The 141st meridian east of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, Asia, the Pacific Ocean, Australasia, the Indian Ocean, the Southern Ocean, and Antarctica to the South Pole. The 141st meri ... References {{Use dmy dates, date=March 2017 e140 meridian east ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
