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Military Satellites
A military satellite is an artificial satellite used for a military purpose. The most common missions are intelligence gathering, navigation and military communications. The first military satellites were photographic reconnaissance missions. Some attempts were made to develop satellite based weapons but this work was halted in 1967 following the ratification of international treaties banning the deployment of weapons of mass destruction in orbit. As of 2013, there are 950 satellites of all types in Earth orbit. It is not possible to identify the exact number of these that are military satellites partly due to secrecy and partly due to dual purpose missions such as GPS satellites that serve both civilian and military purposes. As of December 2018 there are 320 known military or dual-use satellites in the sky, half of which are owned by the US, followed by Russia, China and India (13). [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SAR-Lupe
SAR-Lupe is Germany's first reconnaissance satellite system and is used for military purposes. SAR is an abbreviation for synthetic-aperture radar, and "Lupe" is German for magnifying glass. The SAR-Lupe program consists of five identical (770 kg) satellites, developed by the German aeronautics company OHB-System, which are controlled by a ground stationSAR-Lupe ground station: Zentrum für Nachrichtenwesen der Bundeswehr (ZNBw), Max-Planck-Str. 17, 53501 Gelsdorf . responsible for controlling the system and analysing the retrieved data. A large data archive of images will be kept in a former Cold War bunker belonging to the (Strategic Reconnaissance Command) of the Bundeswehr. The total price of the satellites was over 250 million Euro. Specifications SAR-Lupe's "high-resolution" images can be acquired day or night through all weather conditions. The satellites are able to provide up-to-date imagery from almost all regions of the world. The first satellite was laun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Salyut 2
Salyut 2 (OPS-1) (russian: Салют-2 meaning ''Salute 2'') was a Soviet space station which was launched in 1973 as part of the Salyut programme. It was the first Almaz military space station to fly. Within two weeks of its launch, the station had lost attitude control and depressurized, leaving it unusable. Its orbit decayed and it re-entered the atmosphere on 28 May 1973, without any crews having visited it. Spacecraft Salyut 2 was an Almaz military space station. It was designated part of the Salyut programme in order to conceal the existence of the two separate space station programmes. Salyut 2 was long with a diameter of , and had an internal habitable volume of . At launch it had a mass of . A single aft-mounted docking port was intended for use by Soyuz spacecraft carrying cosmonauts to work aboard the station. Two solar arrays mounted at the aft end of the station near the docking port provided power to the station, generating a total of 3,120 watts of elect ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Navy
The United States Navy (USN) is the maritime service branch of the United States Armed Forces and one of the eight uniformed services of the United States. It is the largest and most powerful navy in the world, with the estimated tonnage of its active battle fleet alone exceeding the next 13 navies combined, including 11 allies or partner nations of the United States as of 2015. It has the highest combined battle fleet tonnage (4,635,628 tonnes as of 2019) and the world's largest aircraft carrier fleet, with eleven in service, two new carriers under construction, and five other carriers planned. With 336,978 personnel on active duty and 101,583 in the Ready Reserve, the United States Navy is the third largest of the United States military service branches in terms of personnel. It has 290 deployable combat vessels and more than 2,623 operational aircraft . The United States Navy traces its origins to the Continental Navy, which was established during the American Revo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transit (satellite)
The Transit system, also known as NAVSAT or NNSS (for ''Navy Navigation Satellite System''), was the first satellite navigation system to be used operationally. The radio navigation system was primarily used by the U.S. Navy to provide accurate location information to its Polaris ballistic missile submarines, and it was also used as a navigation system by the Navy's surface ships, as well as for hydrographic survey and geodetic surveying. Transit provided continuous navigation satellite service from 1964, initially for Polaris submarines and later for civilian use as well. In the Project DAMP Program, the missile tracking ship USAS American Mariner also used data from the satellite for precise ship's location information prior to positioning its tracking radars. History The Transit satellite system, sponsored by the Navy and developed jointly by DARPA and the Johns Hopkins Applied Physics Laboratory, under the leadership of Dr. Richard Kershner at Johns Hopkins, was the fir ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Satellite Navigation
A satellite navigation or satnav system is a system that uses satellites to provide autonomous geo-spatial positioning. It allows satellite navigation devices to determine their location (longitude, latitude, and altitude/elevation) to high precision (within a few centimetres to metres) using time signals transmitted along a line of sight by radio from satellites. The system can be used for providing position, navigation or for tracking the position of something fitted with a receiver (satellite tracking). The signals also allow the electronic receiver to calculate the current local time to a high precision, which allows time synchronisation. These uses are collectively known as Positioning, Navigation and Timing (PNT). One set of critical vulnerabilities in satellite communications are the signals that govern positioning, navigation and timing (PNT). Failure to properly secure these transmissions could not only disrupt satellite networks but wreak havoc on a host of dependent s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geosynchronous Orbit
A geosynchronous orbit (sometimes abbreviated GSO) is an Earth-centered orbit with an orbital period that matches Earth's rotation on its axis, 23 hours, 56 minutes, and 4 seconds (one sidereal day). The synchronization of rotation and orbital period means that, for an observer on Earth's surface, an object in geosynchronous orbit returns to exactly the same position in the sky after a period of one sidereal day. Over the course of a day, the object's position in the sky may remain still or trace out a path, typically in a figure-8 form, whose precise characteristics depend on the orbit's inclination and eccentricity. A circular geosynchronous orbit has a constant altitude of . A special case of geosynchronous orbit is the geostationary orbit, which is a circular geosynchronous orbit in Earth's equatorial plane with both inclination and eccentricity equal to 0. A satellite in a geostationary orbit remains in the same position in the sky to observers on the surface. Communicat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Intelsat 901
Intelsat 901 (IS-901) was the first of nine new Intelsat satellites launched in June 2001 at 18° West, providing Ku-band spot beam coverage for Europe and C-band coverage for the Atlantic Ocean region. It is capable of selectable split uplink for Satellite news gathering (SNG), tailored for increased communications demands such as DTH and Internet. Satellite Intelsat 901 was launched by an Ariane 4 from the Centre Spatial Guyanais in French Guiana on 9 June 2001 at 06:45 UTC. * Increased power – Intelsat 901 is designed to provide up to 5 dB for downlink EIRP, and up to 1.8 dB for G/T over the Intelsat 7 series satellites. * Increased Capacity – with over 72 C-band, 36 MHz equivalent unit transponders, Intelsat 901 provides a significant increase in capacity over the previous satellite at 18° West. * Improved Coverage – Intelsat 901 provides significantly expanded zone coverage. The Ku-band spot beams also include more areas within each zone. Encounter with Ru ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Intelsat 7
Intelsat 7, formerly PAS-7, was a communications satellite operated by Intelsat which spent most of its operational life serving the Europe, Africa, Middle East, Asia market from a longitude of 18° West. Satellite description PAS-7 was constructed by Space Systems/Loral, based on the LS-1300 satellite bus. It had a mass at launch of . Designed for an operational life of 15 years, the spacecraft was equipped with 14 C-band at 50 watts and 30 Ku-band at 100 watts transponders. Launch Arianespace launched PAS-7, using an Ariane 4 launch vehicle, flight number V98, in the Ariane 44LP H10-3 configuration. The launch took place from ELA-2 at the Centre Spatial Guyanais, at Kourou in French Guiana, on 16 September 1998, at 06:31 UTC. Decommissioning PAS-7 experienced a sudden reduction of approximately 25% of its power capacity because a technical difficulty with one of the satellite's solar panels. The incident took place on 6 September 2001 when the satellite came out o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Olymp-K
Olymp-K ( meaning ''Olympus'') is a Russian geostationary satellite built for the Russian Ministry of Defence and Federal Security Service (FSB). The satellite is also referred to as "Luch". It is believed to be a signals intelligence satellite. Launch Olymp-K was launched on 28 September 2014. The Proton-M rocket with a Briz-M upper stage launched from Baikonur Cosmodrome launchpad 81/24 in Kazakhstan at 20:23 UTC. After four burns of the Briz-M upper stage it was placed into geosynchronous transfer orbit. In a press release on 28 September 2014, Roscosmos referred to the satellite as " Luch". Manoeuvres Following its launch, the Olymp-K satellite made several manoeuvres before settling at 18.1° West longitude around 4 April 2015. The satellite was then positioned in an orbit directly between Intelsat 901, which was located at 18° West, and Intelsat 7, located at 18.2° West. It remained in geosynchronous orbit between the satellites for five months. At times, Olymp-K perform ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Luch (satellite)
The ''Luch'' (russian: Луч; lit. ''Ray'') Satellite Data Relay Network (SDRN), also referred to as ''Altair'' and ''Gelios'', is a series of geosynchronous Russian relay satellites, used to transmit live TV images, communications and other telemetry from the Soviet/Russian space station ''Mir'', the Russian Orbital Segment (ROS) of the International Space Station and other orbital spacecraft to the Earth, in a manner similar to that of the US Tracking and Data Relay Satellite System. First generation The first generation of satellites was created by NPO-PM using the satellite platform KAUR-4 (its first use) and had the code name "Altair" (index GUKOS - 11F669). The system was conceived as part of the second generation of the Global Satellite Data Relay Network (Глобальная Космическая Командно-Ретрансляционная система (GKKRS)) and was developed by decree of the Soviet Council of Ministers of February 17, 1976 (the o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Government Of Russia
The Government of Russia exercises executive power in the Russian Federation. The members of the government are the prime minister, the deputy prime ministers, and the federal ministers. It has its legal basis in the Constitution of the Russian Federation and the federal constitutional law "On the Government of the Russian Federation". The Apparatus of the Government of Russia is a governmental body which administrates the activities of the government. According to the 1991 amendment to the 1978 constitution, the President of Russia was the head of the executive branch and headed the Council of Ministers of Russia. According to the current 1993 constitution, the president is not a part of the government of Russia, which exercises executive power. However, the president appoints the prime minister. History The large body was preceded by Government of the Soviet Union. Since the Russian Federation emerged from 1991 to 1992, the government's structure has undergone several m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
