Spacecraft in orbit
نویسندگان
چکیده
منابع مشابه
Simulation of Spacecraft Attitude and Orbit Dynamics
In this paper, the simulation model of satellite attitude and orbit dynamics is discussed. The satellite attitude model has been represented in term of a quaternion and a ordinary differential equation is used to describe the satellite orbital motion. The different actuators and sensors have been modeled with suitable faults and failures. The simulation model enables us to consider the satellit...
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Detailed direct simulation Monte Carlo/Particle in Cell simulations involving the interaction of a hydrazine chemical rocket plume with the rarefied ambient magnetosphere are presented for steady thruster firings in geostationary Earth orbit (GEO). The hydrazine chemical rocket plume is modeled as a neutral gas mixture with thruster exit conditions corresponding to a mass flow rate of 5.0 × 10−...
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The optimization problem for a 6DOF satellite equipped with constant specific impulse thrusters is addressed in terms of fuel consumption. The vehicle is assumed to move in Low Earth Orbit: the Keplerian motion around the Earth is perturbed both by the molecular air impingement (aerodynamic drag) and by the gravitational field disturbance known as J2 effect. Further results are achieved by simp...
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In recent years, human space exploration programs such as the Space Shuttle and the International Space Station have been plagued by political and technical problems as well as soaring costs. In order to avoid such difficulties, next-generation human space exploration programs should be designed for both sustainability and affordability. By viewing exploration programs as “systems-of-systems”, ...
متن کاملPerturbations of a Spacecraft Orbit during a Hyperbolic Flyby
A first-order perturbation theory exists for the flyby problem with the Born approximation as the reference orbit (J. D. Anderson and G. Giampieri 1999, Icarus 138, 309–318, AG thereafter). This theory is applicable when the deflection parameter μ/bv2 (where μ is the product of the gravitational constant by the body’s mass, b the impact parameter, and v the velocity of the flyby) is small. Here...
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ژورنال
عنوان ژورنال: Nature
سال: 1982
ISSN: 0028-0836,1476-4687
DOI: 10.1038/295642c0