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XTAR
XTAR, LLC is a commercial satellite operator exclusively providing services in the X band frequency range, which is the communications cornerstone of today's military, diplomatic, humanitarian and emergency disaster response operations. A privately owned and operated company, XTAR supports the critical satellite communications needs of governments around the world through its two X-band payloads. The XTAR satellites were designed and built by private financing. Loral Space & Communications, Inc. owns the majority share. XTAR is headquartered in Ashburn, VA. With its high-powered 72 MHz transponders and global, fixed and steerable beams, XTAR provides over 4 GB of secure X-band capacity with coverage from Denver east to Singapore. The system can accommodate massive wideband data requirements and provides overlapping coverage with regional redundancy for increased service and reliability. XTAR bandwidth is not application-specific; it can support and transmit to any one of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SSL 1300
The SSL 1300, previously the LS-1300 and the FS-1300, is a satellite bus produced by Maxar Technologies. Total broadcast power ranges from 5 to 25 kW, and the platform can accommodate from 12 to 150 transponders. The SSL 1300 is a modular platform and Maxar Technologies no longer reports designators for sub-versions, such as: 1300E, 1300HL, 1300S, 1300X. First available in the late 1980s, the SSL 1300 platform underwent revision multiple times over its design life, all the while remaining a popular communications platform. The earliest models provided 5,000 RF watts of transmitter power, weighed 5,500 kg, and required a 4-meter diameter launch fairing. Newer models provide double that, approximately 10,000 RF watts of transmitter power, weigh 6,700 kg, and require a 5-meter diameter launch fairing. SSL stated that they would use electric propulsion for North-South station keeping for the first time on the MBSat in 2004. The subsystem was supplied by International S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hisdesat
Hisdesat (, 'Hisdesat Strategic Services') is a Spanish company created in 2001 by Hispasat (43%), Ingeniería y Servicios Aeroespaciales (30%), EADS CASA (15%, now Airbus), Indra Sistemas (7%) and SENER (5%) with initial investment of 415 million euros. Satellites Satellites: * Spainsat, secure communications, GEO * XTAR-EUR, secure communications, GEO * Paz, Earth observation, SSO, synthetic-aperture radar (SAR), X-band The X band is the designation for a band of frequencies in the microwave radio region of the electromagnetic spectrum. In some cases, such as in communication engineering, the frequency range of the X band is rather indefinitely set at approxi ... * Spainsat NG I, secure communications, GEO * Spainsat NG II, secure communications, GEO Launched satellites Other sources: See also * Hispasat, another Spanish satellite operator References External links * {{Space program of Spain Communications satellite operators Direct broadcas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
X Band
The X band is the designation for a band of frequencies in the microwave radio region of the electromagnetic spectrum. In some cases, such as in communication engineering, the frequency range of the X band is rather indefinitely set at approximately 7.0–11.2 GHz. In radar engineering, the frequency range is specified by the Institute of Electrical and Electronics Engineers (IEEE) as 8.0–12.0 GHz. The X band is used for radar, satellite communication, and wireless computer networks. Radar X band is used in radar applications including continuous-wave, pulsed, single- polarization, dual-polarization, synthetic aperture radar, and phased arrays. X band radar frequency sub-bands are used in civil, military, and government institutions for weather monitoring, air traffic control, maritime vessel traffic control, defense tracking, and vehicle speed detection for law enforcement. X band is often used in modern radars. The shorter wavelengths of the X band allow ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Communication Satellite Companies
This is a list of all companies currently operating at least one commercial communication satellite or currently has one on order. Global Top 20 The World Teleport Association publishes lists of companies based on revenues from all customized communications sources and includes operators of teleports and satellite fleets. In order from largest to smallest, the Global Top 20 of 2021 were: * SES (Luxembourg) *SES (Luxembourg) * Intelsat S.A. (Luxembourg) *EchoStar Satellite Services (USA) *Hughes Network Systems (USA) *Eutelsat (France) *Arqiva (UK) *Telesat (Canada) * Speedcast (USA) * Telespazio S.p.A.(Italy) *Encompass Digital Media (USA) *SingTel Satellite (Singapore) *Hispasat (Spain) *Globecast (France) *Liquid Intelligent Technologies (South Africa) *Russian Satellite Communications Company (Russia) *Telstra (Australia) *MEASAT Global (Malaysia) *Thaicom (Thailand) *du (UAE) *Gazprom Space Systems (Russia) List References {{DEFAULTSORT:Communication sate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Loral Space & Communications
Loral Space & Communications Inc. is a Delaware-domiciled satellite communications company headed by Michael B. Targoff. The company was formed in 1996 from the remnants of Loral Corporation when Loral divested its defense electronics and system integration businesses to Lockheed Martin for $9.1 billion. In 2006, Bernard L. Schwartz retired after leading the company for 34 years. Loral presently has an investment in Telesat Canada in partnership with the Public Sector Pension Investment Board of Canada, and merged into a new stock offering (TSAT) on the Nasdaq in November, 2020. The company also participates in a number of international and domestic joint ventures, including an ownership stake in XTAR. History On March 20, 1998, Loral completed the acquisition of Orion Network Systems, Inc., through the exchange of common stock. The transaction was valued at approximately $479 million. In January 2002, Loral reached a settlement with the U.S. Government in a case relating ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spainsat
Spainsat is a Spanish telecommunications satellite used for military and government communications. It allows telecommunications the different missions of the Spanish Armed forces abroad by providing coverage on a wide area of the world ranging from the United States and South America to the Middle East, including Africa and Europe. Overview The satellite belongs to Hisdesat (Spanish company participated by Hispasat (43%), Ingeniería y Servicios Aeroespaciales (30%), Airbus (15%), Indra Espacio (7%) and Sener (5%)), and its initial investment was 415 million euros. It was built by Space Systems Loral in California United States, with an expected useful life of at least 15 years. Its takeoff mass was about 3,700 kilograms. It is instrumented with several transponders in the X band and one in the K military band. It is situated on a geostationary orbit at 36,000 kilometres of altitude, 30 degrees west, over the Atlantic Ocean. The satellite provides coverage to humanitaria ... [...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] |
Hispasat
Hispasat is the operating company for a number of Spanish communications satellites that cover the Americas, Europe and North Africa from orbital positions 30.0° West and 61.0° West. It was formed in 1989 and its activities include provision of communication services in the commercial and government sectors (corporate networks, advanced telecommunications services, telephony, videoconferencing, etc.). Hispasat's fleet of satellites broadcast more than 1250 television channels and radio stations to more than 30 million homes, as well as providing services such as broadband to mobile telephones and landlines. The first Hispasat satellite sent into orbit was Hispasat 1A, which was launched on 11 September 1992 on board an Ariane 4 launch vehicle from the Centre Spatial Guyanais near Kourou in French Guiana. It was put into geostationary orbit at 30° West, which is the location of all their subsequent satellites serving Spain and Europe. The Amazonas satellites (61° West) wer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Military Communications
Military communications or military signals involve all aspects of communications, or conveyance of information, by armed forces. Military communications span from pre-history to the present. The earliest military communications were delivered by runners. Later, communications progressed to visual and audible signals, and then advanced into the electronic age. Examples from ''Jane's Military Communications'' include text, audio, facsimile, tactical ground-based communications, naval signalling, terrestrial microwave, tropospheric scatter, satellite communications systems and equipment, surveillance and signal analysis, security, direction finding and jamming.IHS Jane'sMilitary Communications Retrieved 2012-01-23. History In past centuries communicating a message usually required someone to go to the destination, bringing the message. Thus, the term ''communication'' often implied the ability to transport people and supplies. A place under siege was one that lost communicat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Communications Satellite Operators
Communication (from la, communicare, meaning "to share" or "to be in relation with") is usually defined as the transmission of information. The term may also refer to the message communicated through such transmissions or the field of inquiry studying them. There are many disagreements about its precise definition. John Peters argues that the difficulty of defining communication emerges from the fact that communication is both a universal phenomenon and a specific discipline of institutional academic study. One definitional strategy involves limiting what can be included in the category of communication (for example, requiring a "conscious intent" to persuade). By this logic, one possible definition of communication is the act of developing meaning among entities or groups through the use of sufficiently mutually understood signs, symbols, and semiotic conventions. An important distinction is between verbal communication, which happens through the use of a language, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ministry Of Defence (Spain)
The Ministry of Defence (MINISDEF) is the department of the Government of Spain responsible for planning, developing and carrying out the general guidelines of the Government about the defence policy and the managing of the military administration. It is the administrative and executive body of the Spanish Armed Forces. According to the Constitution of 1978, the Monarch is the Commander in Chief of the Spanish military. He can declare war or conclude peace with authorization of the Cortes Generales, provided this act is countersigned by the Prime Minister. The Ministry of Defense is headed by the Minister of Defence, a Cabinet member who depends directly from the Prime Minister. Beneath the Ministry of Defense are five subordinate principal departments: the Armed Forces headed by the Chief of the Defence Staff (JEMAD) which is divided in three military branches led by the Chief of Staff of the Army (JEME), the Chief of Staff of the Navy (AJEMA) and the Chief of Staff of the A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hosted Payload
A hosted payload is a module attached to a commercial satellite with communications circuitry that operates independently of the main spacecraft but which shares the satellite's power supply and transponders. The concept has been also been referred to as "piggybacking" or "hitchhiking." Description Hosted payloads are used most often by government agencies seeking to have communications capability in orbit without having to pay the cost of building and launching an entire government-owned satellite. For example, within the United States, the Department of Defense has used three commercially hosted payloads since 2009. Using a hosted payload on a commercial satellite can reduce both the expense and time required to get communications and other technologies into space. However, because some government agencies desire to own and control entire satellite platforms, hosted payloads have not been widely accepted by government space planners, despite the fact that a large proportion o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
