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Satélite De Reentrada Atmosférica
SARA - Satélite de Reentrada Atmosférica is a Brazilian satellite project, with the objective of performing experiments in microgravity The term micro-g environment (also μg, often referred to by the term microgravity) is more or less synonymous with the terms ''weightlessness'' and ''zero-g'', but emphasising that g-forces are never exactly zero—just very small (on the I ... environment and returning them to the Earth. SARA Suborbital Configuration The "Sara suborbital" platform heights 350 kg and is divided into four subsystems: * Structural * Electrical - includes cold gas actuators, designed to null the satellite's angular velocity after launch * Recovery - 3 parachutes: pilot, drogue and main * Experiment module (MEXP) Flights SARA Suborbital 1 / Operação São Lourenço The proposed flight schedule included a first sub-orbital test flight (''SARA Suborbital 1'') in 2014 using a VS-40 rocket launched from the Centro de Lançamento da Barreira do Inf ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
VS-40
The VS-40 (''Foguete Suborbital VS-40'') is a Brazilian sounding rocket using solid fuel, stabilized aerodynamically, distributed between the first stage S40TM (4,200 kg) engine and the second stage S44M (810 kg) engine. This configuration corresponds to the upper stages of the VLS-1 rocket. Flights * VS-40 PT-01 - "''Operação Santa Maria''" - 1993/04/02 - Qualifying flight for the S44 engine. 760 seconds in micro-gravity. * VS-40 PT-02 - "''Operação Livramento''" - 1998/03/21 - VAP-1 (Fokker) payload. * VS-40M / SHEFEX II - 2012/06/22 - ''SHEFEX ( Sharp Edge Flight Experiment) II'' payload. * VS-40M / V03 - "''Operação São Lourenço''" - 2015/11/13 - '' SARA - Satélite de Reentrada Atmosférica (Atmospheric Reentry Satellite) Suborbital 1'' - Failure (exploded on pad) * VS-40M - in development - HIFiRE 8 * VS-40M - Canceled - ''SARA Suborbital 2'' Characteristics *Length (mm) 6725 *Payload Mass (kg) 500 *Diameter (mm) 1000 *Total takeoff mass (kg) 6,737 * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Centro De Lançamento Da Barreira Do Inferno
The Barreira do Inferno Launch Center ( pt, Centro de Lançamento da Barreira do Inferno; CLBI, ) is a rocket launch base of the Brazilian Space Agency. It was created in 1965, and is located near Ponta Negra beach, near Natal, the capital of the state of Rio Grande do Norte. It has been used for 233 launches from 1965 to 2007, reaching up to 1100 kilometers altitude. It provides tracking support for launches from the Alcântara Launch Center and Guiana Space Centre. Launches The following rockets have been launched from CLBI: * Loki-Dart * Nike-Cajun * [...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] |
Weightlessness
Weightlessness is the complete or near-complete absence of the sensation of weight. It is also termed zero gravity, zero G-force, or zero-G. Weight is a measurement of the force on an object at rest in a relatively strong gravitational field (such as on the surface of the Earth). These weight-sensations originate from contact with supporting floors, seats, beds, scales, and the like. A sensation of weight is also produced, even when the gravitational field is zero, when contact forces act upon and overcome a body's inertia by mechanical, non-gravitational forces- such as in a centrifuge, a rotating space station, or within an accelerating vehicle. When the gravitational field is non-uniform, a body in free fall experiences tidal effects and is not stress-free. Near a black hole, such tidal effects can be very strong. In the case of the Earth, the effects are minor, especially on objects of relatively small dimensions (such as the human body or a spacecraft) and the overa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cold Gas Thruster
A cold gas thruster (or a cold gas propulsion system) is a type of rocket engine which uses the expansion of a (typically inert) pressurized gas to generate thrust. As opposed to traditional rocket engines, a cold gas thruster does not house any combustion and therefore has lower thrust and efficiency compared to conventional monopropellant and bipropellant rocket engines. Cold gas thrusters have been referred to as the "simplest manifestation of a rocket engine" because their design consists only of a fuel tank, a regulating valve, a propelling nozzle, and the little required plumbing. They are the cheapest, simplest, and most reliable propulsion systems available for orbital maintenance, maneuvering and attitude control. Cold gas thrusters are predominantly used to provide stabilization for smaller space missions which require contaminant-free operation. Specifically, CubeSat propulsion system development has been predominantly focused on cold gas systems because CubeSats have ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parnaíba
Parnaíba () is a city in the Brazilian state of Piauí. Having a population of over 150,000 inhabitants according to IBGE's 2020 report, it is the second most populous city in the state, after the capital Teresina. It is one of the four coastal municipalities in Piauí (besides Ilha Grande, Luís Correia, and Cajueiro da Praia). Besides the natural environment, Parnaíba has historical value for Piauí; near Porto das Barcas several historic buildings reflect the importance of Parnaíba, coming at that time to be more important than the former capital Oeiras and taking up same references in Europe. History In 1699, the region between the Igaraçu river and the Serra da Ibiapaba, inhabited by indigenous people, was pioneered by Leonardo de Sá and his companions, who obtained a land grant on the banks of that river. Under the name of Parnaíba, toponym that arose, according to some, from the desire of the first explorers of Piauí to pay homage to the then São Paulo distric ... [...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] |
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