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List Of BeiDou Satellites
This is a list of past and present satellites of the BeiDou/Compass navigation satellite system. , 44 satellites are operational: 7 in geostationary orbits (GEO), 10 in 55° inclined geosynchronous orbits (IGSO) and 27 in Medium Earth orbits (MEO). Furthermore, 5 satellites (2 in Medium Earth orbit, 1 in geostationary orbit and 2 in inclined geosynchronous orbit) are undergoing testing or commissioning. The full constellation consists of 35 satellites and was completed on 23 June 2020. Satellites Summary table Full list Medium Earth Orbit Satellites Orbital slots See also * List of Galileo satellites * List of GLONASS satellites * List of GPS satellites * List of NAVIC satellites References {{reflist External links BeiDou Constellation Status (Test and Assessment Research Center of China Satellite Navigation Office) BeiDou The BeiDou Navigation Satellite System (BDS; ) is a Chinese satellite navigation system. It consists of two separate satell ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
People's Republic Of China
China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's most populous country, with a population exceeding 1.4 billion, slightly ahead of India. China spans the equivalent of five time zones and borders fourteen countries by land, the most of any country in the world, tied with Russia. Covering an area of approximately , it is the world's third largest country by total land area. The country consists of 22 provinces, five autonomous regions, four municipalities, and two Special Administrative Regions (Hong Kong and Macau). The national capital is Beijing, and the most populous city and financial center is Shanghai. Modern Chinese trace their origins to a cradle of civilization in the fertile basin of the Yellow River in the North China Plain. The semi-legendary Xia dynasty in the 21st century BCE and the well-attested Shang and Zhou dynasties developed a bureaucratic political system to serve hereditary monarchies, or dyna ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
BeiDou-3 M1
Beidou-3 M1 is one of a pair of two Chinese navigation satellites launched in November 2017 as part of the BeiDou satellite navigation system. It was launched with BeiDou-3 M2. BeiDou-3 M1/M2 were launched from LC2 at Xichang Satellite Launch Center 64 kilometres northwest of Xichang, Liangshan Yi Autonomous Prefecture in Sichuan, China A Long March 3B carrier rocket with a YZ-1 upper stage was used to perform the launch which took place at 11:45 UTC on 5 November 2017. The launch successfully placed the satellites into Medium Earth orbit. It later received the international designator 2017-069A. The United States Space Command assigned it the Satellite Catalog Number 43001. It is in orbital plane A in orbital slot 7. See also *List of BeiDou satellites This is a list of past and present satellites of the BeiDou/Compass navigation satellite system. , 44 satellites are operational: 7 in geostationary orbits (GEO), 10 in 55° inclined geosynchronous orbits (IGSO) and 27 i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
BeiDou Satellites
The BeiDou Navigation Satellite System (BDS; ) is a Chinese satellite navigation system. It consists of two separate satellite constellations. The first BeiDou system, officially called the BeiDou Satellite Navigation Experimental System and also known as BeiDou-1, consisted of three satellites which, beginning in 2000, offered limited coverage and navigation services, mainly for users in China and neighboring regions. BeiDou-1 was decommissioned at the end of 2012. The second generation of the system, officially called the BeiDou Navigation Satellite System (BDS) and also known as COMPASS or BeiDou-2, became operational in China in December 2011 with a partial constellation of 10 satellites in orbit. Since December 2012, it has been offering services to customers in the Asia-Pacific region. In 2015, China launched the third generation BeiDou system (BeiDou-3) for global coverage. The first BDS-3 satellite was launched on 30 March 2015. On 27 December 2018, BeiDou Navigation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Indian Regional Navigation Satellite System
The Indian Regional Navigation Satellite System (IRNSS), with an operational name of NavIC (acronym for 'Navigation with Indian Constellation; also, 'sailor' or 'navigator' in Indian languages), is an autonomous regional satellite navigation system that provides accurate real-time positioning and timing services. It covers India and a region extending around it, with plans for further extension. An extended service area lies between the primary service area and a rectangle area enclosed by the 30th parallel south to the 50th parallel north and the 30th meridian east to the 130th meridian east, beyond borders. The system currently consists of a constellation of eight satellites, with two additional satellites on ground as stand-by. The constellation is in orbit as of 2018. NavIC will provide two levels of service, the "standard positioning service", which will be open for civilian use, and a "restricted service" (an encrypted one) for authorised users (including the military ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of GPS Satellites
, 78 Global Positioning System navigation satellites have been built: 31 are launched and operational, 3 are unhealthy or in reserve, 41 are retired, 2 were lost during launch, and 1 prototype was never launched. The constellation requires a minimum of 24 operational satellites, and allows for up to 32; typically, 31 are operational at any one time. A GPS receiver needs four satellites to work out its position in three dimensions. SVNs are "space vehicle numbers" which are serial numbers assigned to each GPS satellite. PRNs are the "pseudo-random noise" sequences, or Gold codes, that each satellite transmits to differentiate itself from other satellites in the active constellation. After being launched, GPS satellites enter a period of testing before their signals are set to "Healthy". During normal operations, certain signals may be set to "Unhealthy" to accommodate updates or testing. After decommissioning, most GPS satellites become on-orbit spares and may be recommissione ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of GLONASS Satellites
, 144 GLONASS navigation satellites have been launched, of which 132 reached the correct orbit and 23 are currently operational. Satellites GC number (Ground Control number, Russian: системный номер, номер по наземному комплексу управления) is the spacecraft number in almanac. It only has to be unique during life time of each satellite. Numbers are subject to reuse. Some catalogs mistakenly used GC numbers for historical identification. See notes next to GC numbers. Satellites by version Orbital slots GC numbers refer to currently active satellites. GC numbers in parentheses refer to non-operational satellites under testing or in reserve.Refer tOfficial GLONASS web pagefor the most up-to-date information. Planned launches See also * List of BeiDou satellites * List of Galileo satellites * List of GPS satellites * List of NAVIC satellites References * * * * * * * * * * External links Official ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Galileo Satellites
This is a list of past and present satellites of the Galileo navigation system. As of August 2022, 28 Galileo (4 IOV "In Orbit Validation" and 24 FOC "Full Operational Capability") satellites have been launched. The 2 GIOVE prototype vehicles were retired in 2012, 24 satellites are operational, 1 is not available and 3 are currently not usable. FOC satellites were awarded and built in several batches. # Batch-1 consists of 14 FOC satellites (Galileo-FOC FM1 to Galileo-FOC FM14) and was built by OHB System, with the contribution of Surrey Satellite Technology Limited (SSTL). # Batch-2 consists of 8 FOC satellites (Galileo-FOC FM15 to Galileo-FOC FM22) and was built by OHB System, with the contribution of Surrey Satellite Technology Limited (SSTL). # Batch-3 consists of 12 FOC satellites (Galileo-FOC FM23 to Galileo-FOC FM34) and is being built by OHB in Bremen, Germany, with the contribution of Surrey Satellite Technology (SSTL) in Guildford, United Kingdom. In parallel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ECEF
The Earth-centered, Earth-fixed coordinate system (acronym ECEF), also known as the geocentric coordinate system, is a cartesian spatial reference system that represents locations in the vicinity of the Earth (including its surface, interior, atmosphere, and surrounding outer space) as ''X'', ''Y'', and ''Z'' measurements from its center of mass. Its most common use is in tracking the orbits of satellites and in satellite navigation systems for measuring locations on the surface of the Earth, but it is also used in applications such as tracking crustal motion. The distance from a given point of interest to the center of Earth is called the geocentric distance, , which is a generalization of the ''geocentric radius'', , not restricted to points on the reference ellipsoid surface. The geocentric altitude is a type of altitude defined as the difference between the two aforementioned quantities: ; it is not to be confused for the ''geodetic altitude''. Conversions between ECEF a ... [...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] |
Long March 3B/E
The Long March 3B (, ''Chang Zheng 3B''), also known as the CZ-3B and LM-3B, is a Chinese orbital launch vehicle. Introduced in 1996, it is launched from Launch Area 2 and 3 at the Xichang Satellite Launch Center in Sichuan. A three-stage rocket with four strap-on liquid rocket boosters, it is currently the second most powerful member of the Long March rocket family after the Long March 5 and the heaviest of the Long March 3 rocket family, and is mainly used to place communications satellites into geosynchronous orbits. An enhanced version, the Long March 3B/E or G2, was introduced in 2007 to increase the rocket's geostationary transfer orbit (GTO) cargo capacity and lift heavier geosynchronous orbit (GEO) communications satellites. The Long March 3B also served as the basis for the medium-capacity Long March 3C, which was first launched in 2008. , the Long March 3B, 3B/E and 3B/G5 have conducted 82 successful launches, plus 2 failures and 2 partial failures, accumulating a su ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MEOSAR
The International Cospas-Sarsat Programme is a satellite-aided search and rescue (SAR) initiative. It is organized as a treaty-based, nonprofit organization, nonprofit, Intergovernmental Organization, intergovernmental, Humanitarianism, humanitarian cooperative of 45 nations and agencies (see infobox). It is dedicated to detecting and locating Emergency locator beacon, emergency locator radio beacons activated by persons, aircraft or vessels in distress, and forwarding this alert information to authorities that can take action for rescue. Distress alerts are detected, located and forwarded to over 200 Country, countries and Territory, territories at no cost to beacon owners or the receiving government agencies. Cospas-Sarsat was conceived and initiated by Canada, France, the United States, and the former Soviet Union in 1979. The first rescue using the technology of Cospas-Sarsat occurred on . The definitive agreement of the organization was signed by those four Sovereign stat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Cospas-Sarsat Programme
The International Cospas-Sarsat Programme is a satellite-aided search and rescue (SAR) initiative. It is organized as a treaty-based, nonprofit, intergovernmental, humanitarian cooperative of 45 nations and agencies (see infobox). It is dedicated to detecting and locating emergency locator radio beacons activated by persons, aircraft or vessels in distress, and forwarding this alert information to authorities that can take action for rescue. Distress alerts are detected, located and forwarded to over 200 countries and territories at no cost to beacon owners or the receiving government agencies. Cospas-Sarsat was conceived and initiated by Canada, France, the United States, and the former Soviet Union in 1979. The first rescue using the technology of Cospas-Sarsat occurred on . The definitive agreement of the organization was signed by those four States as the "Parties" to the agreement on 1 July 1988. The term Cospas-Sarsat derives from COSPAS (КОСПАС), an acronym f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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