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ETRSS-1
ETRSS-1 is the first satellite launched by Ethiopia. It is an Earth Observation Satellite. After launch the Ethiopian Space Science and Technology Institute spent several months calibrating and testing it. Photos were released in February 2020. Specifications * Application: Earth Observation * Spatial resolution: 13.7 METERS * Number of bands: 4 * Revisit time: 4 days * Height from the earth: 700 kilometers * Orbit type: low orbit * Operator: Ethiopian Space Science and Technology Institute (ESSTI) * Weight/mass: 64 kg * Power: Solar arrays, batteries References 2019 in Ethiopia Spacecraft launched in 2019 First artificial satellites of a country {{Spacecraft-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ethiopian Space Science And Technology Institute
The Ethiopian Space Science and Technology Institute (ESSTI) is an Ethiopian institute for research, training and infrastructure development in space science, created in 2016. Creation The Ethiopian Space Science Society (ESSS) was created as a citizens' association in 2004. ESSS helped to organise the creation of Entoto Observatory in 2014 and of the Ethiopian Space Science and Technology Institute in 2016. ESSTI was formally established by the Hailemariam Desalegn Cabinet, under regulation No. 916/2015. Aims ESSTI was mandated to carry out research and training in space science and to develop and encourage space science and aerospace development and infrastructure in Ethiopia. Leadership and structure Abdissa Yilma was ESSTI's general director in 2021. , Yeshurun Alemayehu was ESSTI's deputy general director. Together with the creation of ESSTI, the ''Space Council'' was created to oversee Ethiopian space science policies and the implementation of ESSTI proposals. Satel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Long March 4B
The Long March 4B (), also known as the Chang Zheng 4B, CZ-4B and LM-4B is a Chinese expendable orbital Launch vehicle. Launched from Launch Complex 1 at the Taiyuan Satellite Launch Center, it is a 3-stage launch vehicle, used mostly to place satellites into low Earth orbit and Sun-synchronous orbits. It was first launched on 10 May 1999, with the FY-1C weather satellite, which would later be used in the 2007 Chinese anti-satellite missile test. The Chang Zheng 4B experienced its only launch failure on 9 December 2013, with the loss of the CBERS-3 satellite. Launch Statistics List of launches See also * Long March 4C * Long March (rocket family) * Medium-lift launch vehicle A medium-lift launch vehicle (MLV) is a rocket launch vehicle that is capable of lifting between by NASA classification or between by Russian classification of payload into low Earth orbit (LEO).50t payloads" An MLV is between small-lift laun ... References {{Long March rockets ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taiyuan Satellite Launch Center
The Taiyuan Satellite Launch Center (TSLC) also known as ''Base 25'' (), is a People's Republic of China space and defense launch facility (spaceport). It is situated in Kelan County, Xinzhou, Shanxi Province and is the second of four launch sites having been founded in March 1966 and coming into full operation in 1968. Taiyuan sits at an altitude of 1500 meters and its dry climate makes it an ideal launch site. The site is primarily used to launch meteorological satellites, Earth resource satellites and scientific satellites on Long March launch vehicles into Sun-synchronous orbits. TSLC is also a major launch site for intercontinental ballistic missiles and overland submarine-launched ballistic missile (SLBM) tests. The site has a sophisticated Technical Center and Mission Command and Control Center. It is served by two feeder railways that connect with the Ningwu–Kelan railway. Launch pads * Launch Site 7: CZ-1D, CZ-2C/SD, CZ-4A, CZ-4B and CZ-4C vehicles. * Launch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geocentric Orbit
A geocentric orbit or Earth orbit involves any object orbiting Earth, such as the Moon or artificial satellites. In 1997, NASA estimated there were approximately 2,465 artificial satellite payloads orbiting Earth and 6,216 pieces of space debris as tracked by the Goddard Space Flight Center. More than 16,291 objects previously launched have undergone orbital decay and entered Earth's atmosphere. A spacecraft enters orbit when its centripetal acceleration due to gravity is less than or equal to the centrifugal acceleration due to the horizontal component of its velocity. For a low Earth orbit, this velocity is about ; by contrast, the fastest crewed airplane speed ever achieved (excluding speeds achieved by deorbiting spacecraft) was in 1967 by the North American X-15. The energy required to reach Earth orbital velocity at an altitude of is about 36 MJ/kg, which is six times the energy needed merely to climb to the corresponding altitude. Spacecraft with a perigee belo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Low Earth Orbit
A low Earth orbit (LEO) is an orbit around Earth with a period of 128 minutes or less (making at least 11.25 orbits per day) and an eccentricity less than 0.25. Most of the artificial objects in outer space are in LEO, with an altitude never more than about one-third of the radius of Earth. The term ''LEO region'' is also used for the area of space below an altitude of (about one-third of Earth's radius). Objects in orbits that pass through this zone, even if they have an apogee further out or are sub-orbital, are carefully tracked since they present a collision risk to the many LEO satellites. All crewed space stations to date have been within LEO. From 1968 to 1972, the Apollo program's lunar missions sent humans beyond LEO. Since the end of the Apollo program, no human spaceflights have been beyond LEO. Defining characteristics A wide variety of sources define LEO in terms of altitude. The altitude of an object in an elliptic orbit can vary significantly along the orbit. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2019 In Ethiopia
Events of 2019 in Ethiopia. Events * 10 March 2019 – Ethiopian Airlines Flight 302 from Addis Ababa Bole International Airport in Ethiopia to Jomo Kenyatta International Airport in Nairobi, Kenya crashed six minutes after takeoff near the town of Bishoftu, killing all 149 passengers and eight crew aboard. *29 July 2019 – Prime Minister Abiy Ahmed leads a reforestation effort that planted 350 million trees in one day, believed to be a world record. Deaths March * March 10 ** Victims of Ethiopian Airlines Flight 302 plane crash: *** Pius Adesanmi, Nigerian-Canadian professor and writer (b. 1972) *** Christine Alalo, Ugandan police officer and peacekeeper (b. 1970) *** Sebastiano Tusa, Italian archaeologist and politician (b. 1952) June * June 22 ** Ambachew Mekonnen, Ethiopian politician (b. 1971) ** Se'are Mekonnen, Ethiopian army officer (b. 1954) References {{Year in Africa, 2019 Ethiopia Ethiopia, , om, Itiyoophiyaa, so, Itoobiya, ti, ኢት ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spacecraft Launched In 2019
A spacecraft is a vehicle or machine designed to fly in outer space. A type of artificial satellite, spacecraft are used for a variety of purposes, including communications, Earth observation, meteorology, navigation, space colonization, planetary exploration, and transportation of humans and cargo. All spacecraft except single-stage-to-orbit vehicles cannot get into space on their own, and require a launch vehicle (carrier rocket). On a sub-orbital spaceflight, a space vehicle enters space and then returns to the surface without having gained sufficient energy or velocity to make a full Earth orbit. For orbital spaceflights, spacecraft enter closed orbits around the Earth or around other celestial bodies. Spacecraft used for human spaceflight carry people on board as crew or passengers from start or on orbit (space stations) only, whereas those used for robotic space missions operate either autonomously or telerobotically. Robotic spacecraft used to support scientific res ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
