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International Lunar Network

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The International Lunar Network or ILN was a proposed network of lunar surface stations to be built by the United States and the other space-faring countries in the 2010s. Each of these stations would act as a node in a lunar geophysical network. Ultimately this network could comprise 8-10 or more nodes operating simultaneously. Each node would have a minimum of two core capabilities. These capabilities include seismic sensing, heat flow sensing, and laser retroreflectors , and would be specific to each station. Because some nodes were planned to be located on the far side of the Moon , NASA would have contributed a communications relay satellite to the project. Individual nodes launched by different space agencies could have carried additional, unique experiments to study local or global lunar science. Such experiments might include atmospheric and dust instruments, plasma physics investigations, astronomical instruments, electromagnetic profiling of lunar regolith and crust, local geochemistry, and in-situ resource utilization demonstrations.

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77-661: On July 24, 2008 a meeting of the space agencies of Canada , France , Germany , India , Italy , Japan , the Republic of Korea , the United Kingdom , and the United States was held at NASA's Lunar Science Institute , located at the Ames Research Center . During the meeting, the representatives of the nine space agencies discussed about the cooperation on ILN and agreed on a statement of intent as

154-684: A Soyuz spacecraft to reach the International Space Station. This mission marked the completion of NASA's compensation to Canada for its contribution to the Shuttle and International Space Station programs, meaning that there were no confirmed remaining space flight opportunities for Canadian astronauts. In June 2015, the Canadian government announced a renewed commitment to the International Space Station, securing flights for both of Canada's remaining active astronauts. In May 2016,

231-623: A cooperating state of the European Space Agency (ESA) since the 1970s and has several formal and informal partnerships and collaborative programs with space agencies in other countries, such as NASA , ISRO , JAXA , and SNSA . Canada's collaboration with Europe in space activities predated both the European Space Agency and the Canadian Space Agency. From 1968, Canada held observer status in

308-455: A data network aiming to provide a „Lunar Internet for cis-lunar spacecraft and Installations. The Moonlight Initiative is an equivalent ESA project that is stated to be compatible and providing navigational services for the lunar surface. Both programmes are satellite constellstions of several satellites in various orbits around the Moon. Other orbits are also planned to be used. Positions in

385-441: A first step in planning. NASA's Science Mission Directorate (SMD) and Exploration Systems Mission Directorate (ESMD) agreed to provide two pairs of nodes (landed stations) for this network. The planned scientific payloads included: The network was not developed. The first two nodes were suggested to be launched in 2013 and 2014, with the second pair being launched some time between 2016 and 2017. This article related to

462-638: A full-scale project to design and build a small satellite launcher. There has been no funding for these activities announced. Although a new launch facility at Canso, Nova Scotia , is under development (2024–2025 expected completion), its intended use is for commercial launches of the Ukrainian Cyclone-4M rocket starting in 2023. The facility is a project of the Maritime Launch Services company. Any CSA involvement has not been announced. In March 2022, information from

539-518: A medium Earth orbit satellite is about 16,000 kilometres (10,000 mi) above Earth. In various patterns, these satellites make the trip around Earth in anywhere from 2 to 8 hours. To an observer on Earth, a satellite in a gestationary orbit appears motionless, in a fixed position in the sky. This is because it revolves around the Earth at Earth's own angular velocity (one revolution per sidereal day , in an equatorial orbit ). A geostationary orbit

616-466: A messaging applications, on behalf of a foreign company, according to filed court documents. He was also accused of using his status as a CSA engineer to negotiate agreements for a satellite station installation with Iceland, on behalf of a Chinese aerospace company. Zheng resigned from CSA after 26 years with the agency, although none of the allegations against Zheng have been proved in court. Communication satellite A communications satellite

693-591: A more precise match for the capabilities of geosynchronous comsats. Two satellite types are used for North American television and radio: Direct broadcast satellite (DBS), and Fixed Service Satellite (FSS). The definitions of FSS and DBS satellites outside of North America, especially in Europe, are a bit more ambiguous. Most satellites used for direct-to-home television in Europe have the same high power output as DBS-class satellites in North America, but use

770-687: A number of satellites for various purposes; for example, METSAT for meteorological satellite, EUMETSAT for the European branch of the program, and METOP for meteorological operations. These orbits are Sun synchronous, meaning that they cross the equator at the same local time each day. For example, the satellites in the NPOESS (civilian) orbit will cross the equator, going from south to north, at times 1:30 P.M., 5:30 P.M., and 9:30 P.M. There are plans and initiatives to bring dedicated communications satellite beyond geostationary orbits. NASA proposed LunaNet as

847-614: A number of small launcher and satellite projects under the aegis of defence research, including the development of the Black Brant rocket as well as series of advanced studies examining both orbital rendezvous and re-entry. In 1957, scientists and engineers at the Canadian Defence Research Telecommunications Establishment (DRTE) under the leadership of John H. Chapman embarked on a project initially known simply as S-27 or

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924-621: A period (time to revolve around the Earth) of about 90 minutes. Because of their low altitude, these satellites are only visible from within a radius of roughly 1,000 kilometres (620 mi) from the sub-satellite point. In addition, satellites in low Earth orbit change their position relative to the ground position quickly. So even for local applications, many satellites are needed if the mission requires uninterrupted connectivity. Low-Earth-orbiting satellites are less expensive to launch into orbit than geostationary satellites and, due to proximity to

1001-482: A provision specifically ensuring a fair industrial return to Canada. The head of the Canadian delegation to ESA is the president of the Canadian Space Agency . As of February 2009, there are currently 30 Canadians that are employed as staff members at ESA. (Distributed over various ESA sites: 20 at ESTEC; 4 at ESOC; 4 at ESA HQ; 2 at ESRIN). The Canadian space program is administered by the Canadian Space Agency. Canada has contributed technology, expertise and personnel to

1078-545: A radio signal to a telephone system. In this example, almost any type of satellite can be used. Satellite phones connect directly to a constellation of either geostationary or low-Earth-orbit satellites. Calls are then forwarded to a satellite teleport connected to the Public Switched Telephone Network . As television became the main market, its demand for simultaneous delivery of relatively few signals of large bandwidth to many receivers being

1155-504: A small space station in lunar orbit. The announcement made Canada the first international partner in the Lunar Gateway project. As part of the announcement, Canada has committed to spending $ 2.05 billion over 24 years to develop the next generation Canadarm 3. This marks Canada's largest ever single financial commitment to a single project, surpassing the $ 1.7 billion spent on projects for the International Space Station. As part of

1232-523: A tactical necessity, and the ultimate goal of this project was the creation of the longest communications circuit in human history, with the Moon, Earth's natural satellite, acting as a passive relay. After achieving the first transoceanic communication between Washington, D.C. , and Hawaii on 23 January 1956, this system was publicly inaugurated and put into formal production in January 1960. The first satellite purpose-built to actively relay communications

1309-614: Is allowed to participate in optional programs; it also has to contribute to the General Budget but not as much as associate membership entail. This status was unique at the time and remains so today. On 15 December 2010, the accord was renewed for a further 10 years, until 2020. By virtue of this accord, Canada takes part in ESA deliberative bodies and decision-making and in ESA's programmes and activities. Canadian firms can bid for and receive contracts to work on programmes. The accord has

1386-553: Is also possible to offer discontinuous coverage using a low-Earth-orbit satellite capable of storing data received while passing over one part of Earth and transmitting it later while passing over another part. This will be the case with the CASCADE system of Canada's CASSIOPE communications satellite. Another system using this store and forward method is Orbcomm . A medium Earth orbit is a satellite in orbit somewhere between 2,000 and 35,786 kilometres (1,243 and 22,236 mi) above

1463-443: 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 22,236 miles (35,785 km) above

1540-565: Is carried out under the auspices of the International Telecommunication Union (ITU). To facilitate frequency planning, the world is divided into three regions: Within these regions, frequency bands are allocated to various satellite services, although a given service may be allocated different frequency bands in different regions. Some of the services provided by satellites are: The first and historically most important application for communication satellites

1617-492: Is highly inclined, guaranteeing good elevation over selected positions during the northern portion of the orbit. (Elevation is the extent of the satellite's position above the horizon. Thus, a satellite at the horizon has zero elevation and a satellite directly overhead has elevation of 90 degrees.) The Molniya orbit is designed so that the satellite spends the great majority of its time over the far northern latitudes, during which its ground footprint moves only slightly. Its period

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1694-558: Is known as a satellite constellation . Two such constellations, intended to provide satellite phone and low-speed data services, primarily to remote areas, are the Iridium and Globalstar systems. The Iridium system has 66 satellites, which orbital inclination of 86.4° and inter-satellite links provide service availability over the entire surface of Earth. Starlink is a satellite internet constellation operated by SpaceX , that aims for global satellite Internet access coverage. It

1771-576: Is one half day, so that the satellite is available for operation over the targeted region for six to nine hours every second revolution. In this way a constellation of three Molniya satellites (plus in-orbit spares) can provide uninterrupted coverage. The first satellite of the Molniya series was launched on 23 April 1965 and was used for experimental transmission of TV signals from a Moscow uplink station to downlink stations located in Siberia and

1848-725: Is responsible to the minister of innovation, science and industry . The CSA's headquarters are located at the John H. Chapman Space Centre in Longueuil, Quebec . The agency also has offices in Ottawa, Ontario , and small liaison offices in Houston , Washington , and Paris . The origins of the Canadian upper atmosphere and space program can be traced back to the end of the Second World War . Between 1945 and 1960, Canada undertook

1925-410: Is that a MEO satellite's distance gives it a longer time delay and weaker signal than a LEO satellite, although these limitations are not as severe as those of a GEO satellite. Like LEOs, these satellites do not maintain a stationary distance from the Earth. This is in contrast to the geostationary orbit, where satellites are always 35,786 kilometres (22,236 mi) from Earth. Typically the orbit of

2002-485: Is useful for communications because ground antennas can be aimed at the satellite without their having to track the satellite's motion. This is relatively inexpensive. In applications that require many ground antennas, such as DirecTV distribution, the savings in ground equipment can more than outweigh the cost and complexity of placing a satellite into orbit. By 2000, Hughes Space and Communications (now Boeing Satellite Development Center ) had built nearly 40 percent of

2079-602: The Canadian Security Intelligence Service (CSIS) indicated that CSA had been infiltrated by Chinese agents. The RCMP charged Wanping Zheng, a 61-year-old employed by CSA, in December 2021 with breach of trust, which the police said was tied to foreign interference. Despite repeated security warnings from CSIS since 2015, Zheng continued to work for CSA and was tied to the installation of unauthorized software, including secure file transfer and

2156-569: The Earth-Moon-Libration points are also proposed for communication satellites covering the Moon alike communication satellites in geosynchronous orbit cover the Earth. Also, dedicated communication satellites in orbits around Mars supporting different missions on surface and other orbits are considered, such as the Mars Telecommunications Orbiter . Communications Satellites are usually composed of

2233-777: The Mobile Servicing System on the ISS. The Canadarm, Canadarm2 and Dextre all employ the Advanced Space Vision System , which allows more efficient use of the robotic arms. Another Canadian technology of note is the Orbiter Boom Sensor System , which was an extension for the original Canadarm used to inspect the Space Shuttle's thermal protection system for damage while in orbit. Before the Space Shuttle's retirement,

2310-564: The National Aeronautics and Space Administration is a stub . You can help Misplaced Pages by expanding it . Canadian Space Agency The Canadian Space Agency ( CSA ; French : Agence spatiale canadienne, ASC ) is the national space agency of Canada, established in 1990 by the Canadian Space Agency Act . The president is Lisa Campbell , who took the position on September 3, 2020. The agency

2387-513: 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 radio waves used for telecommunications links travel by line of sight and so are obstructed by

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2464-535: The 1980s compelled the Canadian government to promulgate the Canadian Space Agency Act , which established the Canadian Space Agency. The act received royal assent on May 10, 1990, and came into force on December 14, 1990. The mandate of the Canadian Space Agency is to promote the peaceful use and development of space, to advance the knowledge of space through science and to ensure that space science and technology provide social and economic benefits for Canadians. The Canadian Space Agency's mission statement says that

2541-539: The Artemis program, CSA is developing a small lunar rover. The robotic rover is being developed in partnership with NASA. It will explore a polar region of the Moon and be capable of surviving a lunar night. The mission will carry at least two science instruments, one from NASA and one from CSA, and will launch by 2026. The Canadian Space Agency has no indigenous launch system capability beyond upper atmospheric sounding rockets . Canada relies on other countries, such as

2618-737: The CSA announced that David Saint-Jacques would fly to the International Space Station aboard a Roscosmos Soyuz rocket in November 2018 for 6 months, as part of the Expedition 58/59 crew. The crew of the Artemis 2 lunar flyby mission will include a CSA astronaut, the first Canadian to travel beyond low Earth orbit , under the terms of a 2020 treaty between the United States and Canada. Additionally, there are commercial satellites launched by

2695-624: The CSA, who in the fall of 2007 called upon the Canadian government to develop and institute a space policy for Canada. A modest step has been taken to resolve this problem. In November 2008, the Agency signed a $ 40 million 16-month contract with MacDonald, Dettwiler and Associates of Vancouver (now MDA ) to begin the design of the RADARSAT Constellation (3 satellite) earth observation mission. In August 2010, further funding

2772-505: The Canadian Space Agency and its predecessors: Canada United States Other international With the successful launching of Radarsat-2 in December 2007 and completion of Canada's CA$ 1.4   billion contribution to the International Space Station in early 2008, the CSA found itself with no major follow-on projects. This fact was highlighted by Marc Garneau , Canada's first astronaut and former head of

2849-423: The Earth faster, they do not remain visible in the sky to a fixed point on Earth continually like a geostationary satellite, but appear to a ground observer to cross the sky and "set" when they go behind the Earth beyond the visible horizon. Therefore, to provide continuous communications capability with these lower orbits requires a larger number of satellites, so that one of these satellites will always be visible in

2926-415: The Earth's surface. MEO satellites are similar to LEO satellites in functionality. MEO satellites are visible for much longer periods of time than LEO satellites, usually between 2 and 8 hours. MEO satellites have a larger coverage area than LEO satellites. A MEO satellite's longer duration of visibility and wider footprint means fewer satellites are needed in a MEO network than a LEO network. One disadvantage

3003-504: The European Space Conference (ESC), a ministerial-level organization set up to determine future European space activities, and it continued in this limited role after ESA was created in 1975. Since January 1, 1979, Canada has had the special status of a "Cooperating State" with the ESA, paying for the privilege and also investing in working time and providing scientific instruments that are placed on ESA probes. Canada

3080-702: The Lincoln Laboratory on behalf of the United States Department of Defense . The LES-1 active communications satellite was launched on 11 February 1965 to explore the feasibility of active solid-state X band long-range military communications. A total of nine satellites were launched between 1965 and 1976 as part of this series. In the United States, 1962 saw the creation of the Communications Satellite Corporation (COMSAT) private corporation, which

3157-800: The Russian Far East, in Norilsk , Khabarovsk , Magadan and Vladivostok . In November 1967 Soviet engineers created a unique system of national TV network of satellite television , called Orbita , that was based on Molniya satellites. In the United States, the National Polar-orbiting Operational Environmental Satellite System (NPOESS) was established in 1994 to consolidate the polar satellite operations of NASA (National Aeronautics and Space Administration) NOAA (National Oceanic and Atmospheric Administration). NPOESS manages

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3234-808: The Topside Sounder Project. This work would soon lead to the development of Canada's first satellite known as Alouette 1 . With the launch of Alouette 1 in September 1962, Canada became the third country to put an artificial satellite into space. At the time, Canada only possessed upper atmospheric launch capabilities ( sounding rockets ), therefore, Alouette 1 was sent aloft by the American National Aeronautics and Space Administration (NASA) from Vandenberg Air Force Base in Lompoc, California . The technical excellence of

3311-866: The U.S., India and Russia, to launch its spacecraft into orbit, but both the Defence Department and the space agency are looking at the option of constructing a Canadian-made launcher. The CSA announced in 2011 it was researching locations in Cape Breton, Nova Scotia , or the potential reopening of the Churchill Rocket Research Range in Manitoba for a micro satellite (150 kg) launch site to end its reliance on foreign launch providers. Another possible location, CFB Suffield , remains an option. According to Canadian Space Agency officials, it would take 10 to 12 years for

3388-435: The agency is committed to leading the development and application of space knowledge for the benefit of Canadians and humanity. In 1999, the CSA was moved from project-based to "A-base" funding and given a fixed annual budget of $ 300 million. The actual budget varies from year to year due to additional earmarks and special projects. In 2009, Dr. Nicole Buckley was appointed chief scientist of life science. The CSA has been

3465-591: The boom was modified for use with Canadarm2; STS-134 (the Space Shuttle program's penultimate mission) left it for use on the ISS. There have been four recruiting campaigns for astronauts for the CSA. The first, in 1983 by the National Research Council , led to the selection of Roberta Bondar , Marc Garneau , Robert Thirsk , Ken Money , Bjarni Tryggvason and Steve MacLean . The second, in 1992, selected Chris Hadfield , Julie Payette , Dafydd Williams and Michael McKay . On May 13, 2009, it

3542-403: The completion of a fully global network with Intelsat 3 in 1969–70. By the 1980s, with significant expansions in commercial satellite capacity, Intelsat was on its way to become part of the competitive private telecommunications industry, and had started to get competition from the likes of PanAmSat in the United States, which, ironically, was then bought by its archrival in 2005. When Intelsat

3619-462: The curve of the Earth. The purpose of communications satellites is to relay the signal around the curve of the Earth allowing communication between widely separated geographical points. Communications satellites use a wide range of radio and microwave frequencies . To avoid signal interference, international organizations have regulations for which frequency ranges or "bands" certain organizations are allowed to use. This allocation of bands minimizes

3696-619: The dipoles properly separated from each other, the project was able to successfully experiment and communicate using frequencies in the SHF X band spectrum. An immediate antecedent of the geostationary satellites was the Hughes Aircraft Company 's Syncom 2 , launched on 26 July 1963. Syncom 2 was the first communications satellite in a geosynchronous orbit . It revolved around the Earth once per day at constant speed, but because it still had north–south motion, special equipment

3773-455: The edges of Antarctica and Greenland . Other land use for satellite phones are rigs at sea, a backup for hospitals, military, and recreation. Ships at sea, as well as planes, often use satellite phones. Satellite phone systems can be accomplished by a number of means. On a large scale, often there will be a local telephone system in an isolated area with a link to the telephone system in a main land area. There are also services that will patch

3850-692: The equator and therefore appear lower on the horizon as the receiver gets farther from the equator. This will cause problems for extreme northerly latitudes, affecting connectivity and causing multipath interference (caused by signals reflecting off the ground and into the ground antenna). Thus, for areas close to the North (and South) Pole, a geostationary satellite may appear below the horizon. Therefore, Molniya orbit satellites have been launched, mainly in Russia, to alleviate this problem. Molniya orbits can be an appealing alternative in such cases. The Molniya orbit

3927-473: The first artificial satellite used for passive relay communications in Echo 1 on 12 August 1960. Echo 1 was an aluminized balloon satellite acting as a passive reflector of microwave signals. Communication signals were bounced off the satellite from one point on Earth to another. This experiment sought to establish the feasibility of worldwide broadcasts of telephone, radio, and television signals. Telstar

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4004-412: The first privately sponsored space launch. Another passive relay experiment primarily intended for military communications purposes was Project West Ford , which was led by Massachusetts Institute of Technology 's Lincoln Laboratory . After an initial failure in 1961, a launch on 9 May 1963 dispersed 350 million copper needle dipoles to create a passive reflecting belt. Even though only about half of

4081-479: The following subsystems: The bandwidth available from a satellite depends upon the number of transponders provided by the satellite. Each service (TV, Voice, Internet, radio) requires a different amount of bandwidth for transmission. This is typically known as link budgeting and a network simulator can be used to arrive at the exact value. Allocating frequencies to satellite services is a complicated process which requires international coordination and planning. This

4158-404: The ground, do not require as high signal strength (signal strength falls off as the square of the distance from the source, so the effect is considerable). Thus there is a trade off between the number of satellites and their cost. In addition, there are important differences in the onboard and ground equipment needed to support the two types of missions. A group of satellites working in concert

4235-515: The late 20th century. Satellite communications are still used in many applications today. Remote islands such as Ascension Island , Saint Helena , Diego Garcia , and Easter Island , where no submarine cables are in service, need satellite telephones. There are also regions of some continents and countries where landline telecommunications are rare to non existent, for example large regions of South America, Africa, Canada, China, Russia, and Australia. Satellite communications also provide connection to

4312-566: The more than one hundred satellites in service worldwide. Other major satellite manufacturers include Space Systems/Loral , Orbital Sciences Corporation with the Star Bus series, Indian Space Research Organisation , Lockheed Martin (owns the former RCA Astro Electronics/GE Astro Space business), Northrop Grumman , Alcatel Space, now Thales Alenia Space , with the Spacebus series, and Astrium . Geostationary satellites must operate above

4389-470: The northern hemisphere. This orbit provides a long dwell time over Russian territory as well as over Canada at higher latitudes than geostationary orbits over the equator. Communications satellites usually have one of three primary types of orbit , while other orbital classifications are used to further specify orbital details. MEO and LEO are non-geostationary orbit (NGSO). As satellites in MEO and LEO orbit

4466-564: The other hand, amplify the received signal before retransmitting it to the receiver on the ground. Passive satellites were the first communications satellites, but are little used now. Work that was begun in the field of electrical intelligence gathering at the United States Naval Research Laboratory in 1951 led to a project named Communication Moon Relay . Military planners had long shown considerable interest in secure and reliable communications lines as

4543-533: The past. Recently, Canada contributed the Fine Guidance Sensor to NASA's James Webb Space Telescope . Additionally, Canadian universities and aerospace contractors, including the University of Calgary , UTIAS-SFL , COM DEV , MDA , Magellan Aerospace , Telesat and others, have provided components to various international space agencies. A number of launch facilities have been used by

4620-487: The risk of signal interference. In October 1945, Arthur C. Clarke published an article titled "Extraterrestrial Relays" in the British magazine Wireless World . The article described the fundamentals behind the deployment of artificial satellites in geostationary orbits to relay radio signals. Because of this, Arthur C. Clarke is often quoted as being the inventor of the concept of the communications satellite, and

4697-1047: The same linear polarization as FSS-class satellites. Examples of these are the Astra , Eutelsat , and Hotbird spacecraft in orbit over the European continent. Because of this, the terms FSS and DBS are more so used throughout the North American continent, and are uncommon in Europe. Fixed Service Satellites use the C band , and the lower portions of the K u band . They are normally used for broadcast feeds to and from television networks and local affiliate stations (such as program feeds for network and syndicated programming, live shots , and backhauls ), as well as being used for distance learning by schools and universities, business television (BTV), Videoconferencing , and general commercial telecommunications. FSS satellites are also used to distribute national cable channels to cable television headends. Free-to-air satellite TV channels are also usually distributed on FSS satellites in

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4774-499: The satellite, which lasted for ten years instead of the expected one, prompted the further study of the ionosphere with the joint Canadian-designed, U.S.-launched ISIS satellite program . This undertaking was designated an International Milestone of Electrical Engineering by IEEE in 1993. The launch of Anik A-1 in 1972 made Canada the first country in the world to establish its own domestic geostationary communication satellite network. These and other space-related activities in

4851-408: The signal coming from the source, toward the direction of the receiver. With passive satellites, the reflected signal is not amplified at the satellite, and only a small amount of the transmitted energy actually reaches the receiver. Since the satellite is so far above Earth, the radio signal is attenuated due to free-space path loss , so the signal received on Earth is very weak. Active satellites, on

4928-402: The sky for transmission of communication signals. However, due to their closer distance to the Earth, LEO or MEO satellites can communicate to ground with reduced latency and at lower power than would be required from a geosynchronous orbit. A low Earth orbit (LEO) typically is a circular orbit about 160 to 2,000 kilometres (99 to 1,243 mi) above the Earth's surface and, correspondingly,

5005-703: The telecommunications company Telesat , a former Crown corporation that was privatized in 1998. These are the Anik satellites, the Nimiq satellites (all currently used by Bell Satellite TV ), and MSAT-1 . Further, technology and research satellites have been developed by UTIAS-SFL , including the CanX program, ExactView-9 , and GHGSat-D. The CSA contributes to many international projects, including satellites, rovers, and space telescopes. The CSA has contributed components to ESA , NASA , ISRO , JAXA , and SNSB projects in

5082-590: The term 'Clarke Belt' is employed as a description of the orbit. The first artificial Earth satellite was Sputnik 1 , which was put into orbit by the Soviet Union on 4 October 1957. It was developed by Mikhail Tikhonravov and Sergey Korolev , building on work by Konstantin Tsiolkovsky . Sputnik 1 was equipped with an on-board radio transmitter that worked on two frequencies of 20.005 and 40.002 MHz, or 7 and 15 meters wavelength. The satellite

5159-665: The world space effort, especially in collaboration with ESA and NASA . In addition to its astronauts and satellites , some of the most notable Canadian technological contributions to space exploration include the Canadarm on the Space Shuttle and Canadarm2 on the International Space Station . Canada's contribution to the International Space Station is the $ 1.3 billion Mobile Servicing System. This consists of Canadarm2 (SSRMS), Dextre (SPDM), mobile base system (MBS) and multiple robotics workstations that together make up

5236-515: Was Project SCORE , led by Advanced Research Projects Agency (ARPA) and launched on 18 December 1958, which used a tape recorder to carry a stored voice message, as well as to receive, store, and retransmit messages. It was used to send a Christmas greeting to the world from U.S. President Dwight D. Eisenhower . The satellite also executed several realtime transmissions before the non-rechargeable batteries failed on 30 December 1958 after eight hours of actual operation. The direct successor to SCORE

5313-724: Was announced after the completion of a third selection process that two new astronauts, Jeremy Hansen and David Saint-Jacques , had been chosen. The latest recruitment campaign was launched in 2016, attracting 3,772 applicants for 2 candidates. In 2017, Joshua Kutryk and Jennifer Sidey were chosen. Nine Canadians have participated in 17 crewed missions in total: 14 NASA Space Shuttle missions (including one mission to Mir ) and 3 Roscosmos Soyuz missions. Two former Canadian astronauts never flew in space: Michael McKay resigned for medical reasons and Ken Money resigned in 1992, eight years after his selection. On December 19, 2012, Canadian astronaut Chris Hadfield launched aboard

5390-429: Was another ARPA-led project called Courier. Courier 1B was launched on 4 October 1960 to explore whether it would be possible to establish a global military communications network by using "delayed repeater" satellites, which receive and store information until commanded to rebroadcast them. After 17 days, a command system failure ended communications from the satellite. NASA 's satellite applications program launched

5467-521: Was awarded for detailed design work scheduled for completion by 2012. The satellites were launched on June 12, 2019. Also in the 2009 Federal budget, the agency was awarded funding for the preliminary design of robotic Lunar / Martian rovers . On February 28, 2019, Canadian Prime Minister Justin Trudeau announced Canada's commitment to the Lunar Gateway , an international NASA-led project to put

5544-428: Was in intercontinental long distance telephony . The fixed Public Switched Telephone Network relays telephone calls from land line telephones to an Earth station , where they are then transmitted to a geostationary satellite. The downlink follows an analogous path. Improvements in submarine communications cables through the use of fiber-optics caused some decline in the use of satellites for fixed telephony in

5621-492: Was launched, the United States was the only launch source outside of the Soviet Union , who did not participate in the Intelsat agreements. The Soviet Union launched its first communications satellite on 23 April 1965 as part of the Molniya program. This program was also unique at the time for its use of what then became known as the Molniya orbit , which describes a highly elliptical orbit , with two high apogees daily over

5698-493: Was needed to track it. Its successor, Syncom 3 , launched on 19 July 1964, was the first geostationary communications satellite. Syncom 3 obtained a geosynchronous orbit, without a north–south motion, making it appear from the ground as a stationary object in the sky. A direct extension of the passive experiments of Project West Ford was the Lincoln Experimental Satellite program, also conducted by

5775-500: Was not placed in orbit to send data from one point on Earth to another, but the radio transmitter was meant to study the properties of radio wave distribution throughout the ionosphere. The launch of Sputnik 1 was a major step in the exploration of space and rocket development, and marks the beginning of the Space Age . There are two major classes of communications satellites, passive and active . Passive satellites only reflect

5852-644: Was subject to instruction by the US Government on matters of national policy. Over the next two years, international negotiations led to the Intelsat Agreements, which in turn led to the launch of Intelsat 1, also known as Early Bird, on 6 April 1965, and which was the first commercial communications satellite to be placed in geosynchronous orbit. Subsequent Intelsat launches in the 1960s provided multi-destination service and video, audio, and data service to ships at sea (Intelsat 2 in 1966–67), and

5929-591: Was the first active, direct relay communications commercial satellite and marked the first transatlantic transmission of television signals. Belonging to AT&T as part of a multi-national agreement between AT&T, Bell Telephone Laboratories , NASA, the British General Post Office , and the French National PTT (Post Office) to develop satellite communications, it was launched by NASA from Cape Canaveral on 10 July 1962, in

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