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96-554: Palapa is a series of communications satellites owned by Indosat , an Indonesian telecommunications company (formerly by Perumtel and then by PT Satelit Palapa Indonesia/Satelindo). The first satellite was launched in July 1976, at which time Indonesia became the first developing country to operate its own domestic satellite system. The estimated cost for the project was US$ 1 billion (equivalent to $ 4.17 billion in 2023). The first satellite, Palapa-A1 of 300 kg (660 lb),

192-673: A petition asking for a conference to be held that would lead to Indonesian self-government as part of a Dutch-Indonesian union over a decade, Parindra was lukewarm, resenting the possibility of Soetardjo succeeding where the other nationalist organizations had failed. The petition was passed by a majority of the Volksraad , but rejected by the Dutch in November 1938. In May 1937, Parindra, the Indonesian People's Movement (Gerindo),

288-586: A Free Indonesia Dormitory to prepare youth leaders for an independent Indonesia. With the war situation becoming increasingly dire, in March 1945 the Japanese announced the formation of an Investigating Committee for Preparatory Work for Independence (BPUPK), comprising members of the older political generation, including Sukarno and Hatta. Chaired by Rajiman Wediodiningrat , in two sessions in May and June, it decided on

384-710: A central role in the Indonesian National Revolution . One of the other changes that had also taken place during the Japanese occupation included the population in Indonesia undertaking military training. Conflict occurred not only with the Dutch, but also when the Japanese tried to re-establish control in October 1945 in Bandung, and furthermore when the British tried to establish control. After

480-455: 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

576-402: A declaration worded as follows: Sukarno and Hatta rejected this wording, believing that it had the potential to spark violence and would cause problems for the Japanese as it implied a transfer of sovereignty in violation of the terms of the surrender. Sukarno drafted the final version, which read as follows: This final version contained the phrase "transfer of power", which was acceptable to

672-586: A group of leaders who could ensure continuity if any were arrested. In 1931, Sukarno was released and joined the small Indonesia Party (Partindo) , while in August 1932, Hatta returned from the Netherlands and assumed the leadership of the rival New PNI, which had a more Marxist and revolutionary platform than Partindo. Sukarno was arrested again in August 1933, and was exiled first to Flores , then to Bencoolen , while Hatta and Sjahrir were arrested and exiled to

768-440: A harsh Japanese response. We the people of Indonesia do hereby declare the independence of Indonesia. Matters concerning the transfer of power and other matters will be executed in an orderly manner and in the shortest possible time. Djakarta, 17 August 05 In the name of the people of Indonesia The date of the declaration, "05" refers to " Japanese imperial year ( 皇紀 , kōki ) 2605". Indonesian youths spread news of

864-601: A kind of flavouring) as long as he had not succeeded in unifying Nusantara (the Indonesian archipelago). After watching the launching of the satellite via television in Jakarta, President Suharto revealed his reason on naming the satellite "palapa"; to show that Indonesia had a glorious past, and also hope that the system can unite the archipelago. Palapa-B1 was deployed by the STS-7 shuttle mission on 18 June 1983. Palapa-B2

960-518: 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

1056-591: 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

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1152-687: 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

1248-621: 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

1344-540: A proclamation. Meanwhile, various pemuda groups had heard the surrender rumors and held a meeting. Those present included D. N. Aidit , Chairul Saleh and Wikana . They decided to send a deputation led by Wikana to meet Sukarno at his home and demand an immediate proclamation of independence in person, rather than through the PPKI, which they saw as having no credibility, and which in any case had no pemuda members. In an angry exchange, Sukarno refused to do so as besides

1440-545: 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

1536-533: A revolt in Gorontalo against the Dutch who were afraid of Japanese invasion of Celebes. He was later imprisoned by the Japanese after they had invaded the area. With the outbreak of the war in the Far East , and the initial successes of Japan, in early 1942, the Dutch authorities gave Amir Sjarifuddin money to establish an underground resistance movement and sent Hatta and Sjahrir back to Java. In January 1942,

1632-553: 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

1728-565: 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

1824-492: 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

1920-558: 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

2016-576: 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

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2112-410: 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

2208-485: 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

2304-595: The Boven Digul detention camp in western New Guinea. The detention of these nationalist figures effectively ended the non-cooperation movement, and in December 1935 the moderate Indonesian National Union and Budi Utomo merged to form the Great Indonesia Party (Parindra), which aimed to work with the Dutch to achieve Indonesian independence. When in 1936, Volksraad member Soetardjo submitted

2400-467: The Constitution of Indonesia . The Dutch, as the former colonial power, viewed the republicans as collaborators with the Japanese, and desired to restore their colonial rule, as they still had political and economic interests in the former Dutch East Indies. The result was a four-year war for Indonesian independence. Indonesian youths had played an important role in the proclamation, and they played

2496-532: The Council of Indonesian Muslim Associations (Masjumi) as an umbrella group for Muslims. In 1944, Putera was dissolved and replaced by the Java Service Association ( Jawa Hokokai ), with Sukarno and Hatta given key positions in it, albeit answering to the military governor. Although intended to mobilise the masses for Japanese interests, Sukarno in particular took advantage of his role to tour

2592-569: 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

2688-628: The Taman Mini Indonesia Indah theme park and the country’s national aircraft company . Most of these involved extravagant inauguration ceremonies with the officials who oversaw the projects in the spotlight. At the inauguration ceremony of the Palapa satellite system, President Suharto used a switch with 17 jewels (17 is the date of Indonesia's Proclamation of Independence ) in the shape of a traditional dagger ( kris ). Besides symbolizing national unity and concretely helping to unite

2784-483: The 25th Army freed Sukarno from exile in Sumatra, and he joined Hatta and Sjahrir in Jakarta, as Batavia had been renamed. They agreed that Sjahrir would work underground, while Sukarno and Hatta would cooperate with the Japanese, still with the ultimate goal of Indonesian independence. The two men urged the Japanese to establish a popular political organization that they would lead, and this came about in March 1943 with

2880-410: 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 the term 'Clarke Belt' is employed as a description of the orbit. The first artificial Earth satellite

2976-508: The Dutch when they reoccupied their colony. At a meeting in Singapore at the end of July, it was decided that Java would become independent at the end of September, followed by other areas. On 6 and 9 August, atomic bombs were dropped on Hiroshima and Nagasaki . On 7 August, the Japanese announced the formation of a Preparatory Committee for Indonesian Independence (PPKI) to accelerate preparations for establishing an Indonesian government for

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3072-423: 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

3168-415: 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

3264-661: The East Indies, but thanks to a rousing defense speech by Hatta, they were acquitted. Back in the East Indies, in 1927, nationalist and future Indonesian president Sukarno turned his study club into the Indonesian Nationalist Association, which in May 1928 became the Indonesian National Party (PNI). The party aimed to achieve Indonesian independence through mass-based non-cooperation with the authorities. In October 1928,

3360-461: The Japanese as the Japanese language translation of the phrase implied transfer of administrative control, rather than of sovereignty, which could have been seen as a violation by the Japanese of the ceasefire commitment to preserve the status quo . It was also acceptable to the Indonesians, who could interpret this transfer in a wider sense. Meanwhile, the phrase "in an orderly manner" reassured

3456-613: The Japanese invaded the Dutch East Indies, and rapidly overran the archipelago. The Dutch surrendered on 8 March. The Japanese banned the use of the Dutch language as well as the Indonesian flag and anthem , and the Japanese calendar was imposed. The archipelago was administered as three separate regions: Sumatra by the Twenty-Fifth Army , Java and Madura by the Sixteenth Army and Kalimantan and

3552-492: The Japanese military that there would be no interference in a declaration of independence as long as it was not associated with the Japanese, as this would be a breach of the surrender terms. Sukarno and Hatta then went to Maeda's house, now the Formulation of Proclamation Text Museum , where members of the PPKI were waiting, having been told to go there by Subardjo. Earlier that day, the pemuda led by Sjahrir had produced

3648-520: The K u band. The Intelsat Americas 5 , Galaxy 10R and AMC 3 satellites over North America provide a quite large amount of FTA channels on their K u band transponders . Proclamation of Indonesian Independence The Proclamation of Indonesian Independence ( Indonesian : Proklamasi Kemerdekaan Indonesia , or simply Proklamasi ) was read at 10:00 Tokyo Standard Time on Friday, 17 August 1945 in Jakarta . The declaration marked

3744-765: 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

3840-463: The PPKI. On 15 August, Japan surrendered , and the Japanese authorities in the East Indies were ordered to maintain the status quo pending the arrival of allied forces. However there was no official confirmation from the Japanese of the surrender. Again there was disagreement between the older generation, including Sukarno and Hatta, who were uncertain how to proceed, and the pemuda , including Sjahrir, who urged Sukarno to declare independence without

3936-800: 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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4032-483: The Triple-A mass movement. Its name was taken from the Japanese propaganda slogan portraying Japan as the leader, protector and light of Asia. However it failed to gain support as no significant Indonesian nationalists were involved, and the propaganda was too heavy-handed. The Japanese then decided that it would be more effective to use pre-war nationalists to mobilize the population in support of their war aims. In July,

4128-515: The Westar-6 satellite which shared the launch payload with Palapa-B2, was partially funded by the insurance companies (led by Lloyd's of London ) who insured the launch of those two satellites. Palapa-B2P was launched on 20 March 1987. Palapa-B2 was renamed as Palapa-B2R and launched on 13 April 1990. Palapa-B4 was launched on 14 May 1992. Palapa-C1 was launched on 1 February 1996, followed by Palapa-C2 on 16 May 1996. The Palapa-D satellite

4224-455: The archipelago making speeches. On 7 September 1944, Japanese Prime Minister Kuniaki Koiso promised independence for the 'East Indies' "later on" ( di kemudian hari ). The authorities in Java then allowed the flying of the Indonesian flag at Jawa Hokokai buildings. Rear-admiral Maeda provided official funds for tours around the archipelago by Sukarno and Hatta, and in October 1944, established

4320-583: The authorities, who arrested Sukarno and seven party leaders in December 1929. They were put on trial for being a threat to public order and in September 1930 received sentences of one to four years – Sukarno received the longest sentence. The PNI dissolved itself in 1931, and in the same year, Sjahrir returned from the Netherlands and established a party called the New PNI which rather than focussing on mass action and being dependent on one leader, aimed to create

4416-416: The basis for an independent nation and produced a draft constitution . Meanwhile, the younger activists, known as the pemuda , wanted much more overt moves towards independence than the older generation were willing to risk, resulting in a split between the generations. Following the call from the allies for Japan to surrender , the Japanese decided to grant Indonesian independence to create problems for

4512-643: The challenge from Hatta as he knew that only Sukarno and Hatta had the authority to make a credible declaration of independence. Spurred on by this humiliation and the desire to demonstrate the commitment of the pemuda , a decision was taken by a group including Chairul Saleh and Wikana to take action. In the early hours of the morning of 16 August, they took Sukarno and Hatta to the town of Rengasdengklok (today in Karawang Regency , West Java ), ostensibly to protect them from an uprising by Peta troops, but in fact to force them to declare independence. However,

4608-403: 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

4704-413: The country by serving its purpose as communication infrastructure, the satellite also tied advanced technology to Javanese tradition as epitomized by the inauguration ceremony. Communications satellite The 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 satellites is to relay the signal around

4800-495: 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 the risk of signal interference. In October 1945, Arthur C. Clarke published an article titled "Extraterrestrial Relays" in

4896-619: 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

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4992-438: 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 the other hand, amplify the received signal before retransmitting it to

5088-589: The document from the Japanese-formed PPKI, only Sukarno and Hatta would sign it. The meeting broke up at 5am. The latin typewriter used to type the proclamation test was borrowed from Korvettenkapitän Dr.jur. Hermann Kandeler, the leader of a Nazi German military stützpunkt in Pasar Senen, Jakarta. This was because only Japanese typewriters were available in Maeda's house. The original plan

5184-455: 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

5280-692: 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

5376-473: 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

5472-412: 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

5568-479: 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

5664-516: The formation of Putera , the Centre of People's Power. Although it was controlled by the Japanese, it was led by Sukarno, Hatta, Hajar Dewantara and pre-war Islamic figure Mas Mansoer . Like the Triple A, it achieved very little. As the tide turned against Japan and its territorial expansion halted, Japan started to talk of greater Indonesian involvement in the governance of Java, where the 16th Army

5760-404: 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

5856-484: The involvement of the PPKI to avoid accusations from the Allies that independence was sponsored by Japan. In the afternoon of 15 August, Sukarno, Hatta and BPUPK member and future foreign minister Achmad Soebardjo called on Maeda to ask about the surrender rumours, and received unofficial confirmation that they were true. Hatta then asked Soebardjo to arrange a meeting of the PPKI for the following day and went home to draft

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5952-515: 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

6048-566: 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

6144-431: The need to discuss matters with the PPKI, he did not want to provoke the Japanese. Hatta subsequently arrived and took the same stance as Sukarno, and pointed out that there was still no official confirmation of the Japanese surrender. He then invited the pemuda to go ahead with a proclamation themselves. Wikana in turn demanded a declaration the following day, 16 August, and the delegation left. Wikana felt humiliated by

6240-470: 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

6336-556: The occupation of the Netherlands, and the Dutch government in exile was in no position to respond to GAPI's request for a Dutch-Indonesian union and an elected legislature, although Dutch Queen Wilhelmina made a speech in London in May 1941 promising unspecified changes to the relationship with the East Indies after the war. On 23 January 1942, three years before the 1945 proclamation, an independence activist Nani Wartabone declared "Indonesian independence" after he and his people won in

6432-462: The older nationalists as it implied no action by the pemuda , and "in the shortest possible time" was taken by the Indonesians to mean before the Allied forces arrived. Chairul Saleh and other pemuda figures protested ineffectually about the changes, but the majority of the PPKI agreed with the wording. After some debate as to who would sign the proclamation, it was agreed that in order to disassociate

6528-535: The other 24 (60%) are rented to others. Indosat used Palapa-D for their broadband internet service (IM2) with Ku-band technology (12/14 GHz ). At the end of October 2009, Palapa D started its airing operations. The Palapa project was one of the " Lighthouse projects " instituted during the New Order period to build national pride. Other lighthouse projects during the New Order included transport infrastructure,

6624-580: The preamble to the draft constitution , which had been written by the BPUPK, was read, then Sukarno, with Hatta by his side, read the proclamation: Kami, bangsa Indonesia, dengan ini menjatakan kemerdekaan Indonesia. Hal-hal jang mengenai pemindahan kekoeasaan d.l.l., diselenggarakan dengan tjara saksama dan dalam tempo jang sesingkat-singkatnja. Djakarta, hari 17 boelan 8 tahoen 05 Atas nama bangsa Indonesia, Soekarno/Hatta. [REDACTED] [REDACTED] PETA officer Latief Hendraningat raised

6720-603: The proclamation across Java almost immediately using Japanese news and telegraph facilities, and in Bandung the news was broadcast by radio. However many ordinary Indonesians either did not believe the reports or saw them as a Japanese deception. In Sumatra, only the republican elite in major cities knew about the proclamation by the middle of September. The day after the proclamation, the Preparatory Committee for Indonesian Independence met and elected Sukarno as president and Hatta as vice-president. It also ratified

6816-466: 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 the signal coming from the source, toward

6912-518: 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 a tactical necessity, and

7008-577: The red and white flag of Indonesia and the attendees sung the Indonesian national anthem, Indonesia Raya . An English translation published by the Ministry of Foreign Affairs as of October 1948 included the entire speech as read by Sukarno . It incorporated remarks made immediately prior to and after the actual proclamation. George McTurnan Kahin , a historian on Indonesia, believed that they were omitted from publication in Indonesia either due to Japanese control of media outlets or fear of provoking

7104-605: The representatives at a Youth Congress held in Batavia, the capital, adopted the ideals of one motherland, Indonesia; one nation, the nation of Indonesia; and one language, the Indonesian language . This expression of national unity was a reaction to the older generation, which tended to identify with their region or ethnicity, and subsequently became known as the Youth Pledge . The PNI grew rapidly, causing concern for

7200-581: The resource-rich eastern islands by the Imperial Japanese Navy . As the area controlled by the Navy was the source of essential supplies, including food, to the other areas, rear-admiral Tadashi Maeda was appointed to the liaison office of the naval attaché in Batavia to expedite deliveries and to ensure the maintenance of good relations with the Army. In April 1943, the Japanese established

7296-1047: 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

7392-402: 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,

7488-558: The start of the diplomatic and armed resistance of the Indonesian National Revolution , fighting against the forces of the Netherlands and pro-Dutch civilians, until the latter officially acknowledged Indonesia's independence in 1949. The document was signed by Sukarno and Mohammad Hatta , who were appointed president and vice-president respectively the following day. The date of the Proclamation of Indonesian Independence

7584-474: The two men still refused to make such a proclamation without assurances from the Japanese. Later that morning, Maeda learned that Sukarno and Hatta had disappeared. An Army investigation led to Wikana, who was pressured to return the two men to Jakarta. Following a guarantee of safety and cooperation from Maeda, as well as the use of his house for discussions, Subardjo went to Rengasdengklok and brought Sukarno and Hatta back to Jakarta. They obtained an assurance from

7680-497: 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

7776-512: The whole of the East Indies, not just Java. Two days later, Sukarno, Hatta and Rajiman Wediodiningrat were flown by the Japanese to Dalat , near Saigon , to meet with Field Marshall Hisaichi Terauchi , the Japanese commander of the Southern Expeditionary Army Group , who promised independence for the territory of the former Dutch East Indies and formally appointed Sukarno and Hatta as chairman and vice-chairman of

7872-515: 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

7968-559: 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 was not placed in orbit to send data from one point on Earth to another, but

8064-429: 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

8160-551: Was established by younger Marxists including Amir Sjarifuddin , another future prime minister, to campaign for the formation of an Indonesian parliament in cooperation with the Dutch, which was the same aim of the Indonesian Political Federation (GAPI), formed two years later from a merger of almost all the nationalist organizations. However, the outbreak of the Second World War resulted in

8256-412: Was for the proclamation to be read in public before a crowd at the square in the center of Jakarta, now Merdeka Square . However, the Japanese authorities, fearing disorder, deployed soldiers to the area, and as a result, the proclamation was made at Sukarno's house at 56 Jalan Pegangsaan Timur at 10 AM Japan Standard Time , which was in use during the occupation. The ceremony was very simple. Firstly,

8352-428: 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

8448-605: Was launched from STS-41-B on 3 February 1984, to be put into service afterward, but the perigee kick motor (also known as the Payload Assist Module , or PAM) on the satellite failed during its approach to geosynchronous orbit, placing it at an improper and inoperable low Earth orbit . It was retrieved on 16 November 1984 by the STS-51A mission of NASA 's Space Shuttle , where it was brought back to Earth . The Space Shuttle mission to retrieve Palapa-B2, as well as

8544-754: Was launched on 8 July 1976 at 23:31 UTC from the Kennedy Space Center by a Delta 2914 launch vehicle , or at 06:31 Indonesian Time on 9 July 1976. Palapa-A2 was launched on 10 March 1977. The name "Palapa" was bestowed by then Indonesian President Suharto , after the Palapa oath sworn by Gajah Mada , the Prime Minister of Majapahit Kingdom, in 1334. According to the Pararaton (Book of Kings), Gajah Mada swore that he would not taste any palapa (historians suggest it refers to spice or

8640-492: 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

8736-802: Was made a public holiday by a government decree issued on 18 June 1946. In 1918, the Dutch authorities in the Dutch East Indies established a partly-elected People's Council, the Volksraad , which for the first time gave Indonesian nationalists a voice. Meanwhile, Indonesian students studying in the Netherlands formed the Perhimpoenan Indonesia , or Indonesian Association. Among its leaders were future Indonesian vice-president Mohammad Hatta and future prime minister Sutan Sjahrir . In September 1927, Hatta and other members were arrested for inciting resistance to Dutch authority in

8832-658: Was manufactured by Thales Alenia Space and launched aboard a Chinese Long March 3B launch vehicle on 31 August 2009. However, it failed to reach the intended orbit following a failure of the third stage of the launch vehicle to reignite as planned. The Spacebus satellite bus was maneuvered into the correct geosynchronous orbit by September 2009, but this left it with only enough fuel for 10 years in orbit. This US$ 200 million satellite (equivalent to $ 276 million in 2023) has more transponders than its predecessors (40 transponders, Palapa-C2 only has 36). 16 (40%) of its transponders are used by Indosat for their own purposes while

8928-536: Was much more in favor of such participation than the 25th Army or the Navy in other parts of the archipelago. A Central Advisory Council was established, again headed by Sukarno, and more Indonesians were appointed as advisors to the Japanese. In October 1943, the Japanese formed the Defenders of the Homeland (PETA) volunteer army intended to help fight off an allied invasion of the East Indies, and also established

9024-493: 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

9120-644: 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

9216-591: 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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