Results 271 to 280 of about 93,612 (311)
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Icarus, 1978
A satellite formation model is extended to include evolution of planetary ring material and elliptic orbital motion. In this model the formation of the moon begins at a later time in the growth of the earth, and a significant fraction of the lunar material is processed through a circumterrestrial debris cloud where volatiles might have been lost. Thus,
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A satellite formation model is extended to include evolution of planetary ring material and elliptic orbital motion. In this model the formation of the moon begins at a later time in the growth of the earth, and a significant fraction of the lunar material is processed through a circumterrestrial debris cloud where volatiles might have been lost. Thus,
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Wireless Communication in LEO Satellite Formations
2008 NASA/ESA Conference on Adaptive Hardware and Systems, 2008In this paper we investigate key IEEE 802.11 optimization techniques with the aim to adapt the commercial-of-the-shelf (COTS) wireless standard for inter-satellite communication in autonomous distributed spacecraft formations. Optimisation approaches such as the tuning of the IEEE 802.11 physical layer parameters and enhancing the data link layer for ...
Kawsu Sidibeh, Tanya Vladimirova
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Vision Assisted Satellite Formation Control
Proceedings of the 45th IEEE Conference on Decision and Control, 2006This paper examines a complete solution to autonomous formation flying of satellites where problems of position, velocity and attitude estimation, data fusion across the cluster, constrained actuators, fuel efficient manoeuvres, actuator misalignment and robustness are all considered.
Sandor M. Veres, Nick K. Lincoln
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Relative satellite motion in a formation
Advances in Space Research, 2007Abstract The paper concerns the analytical description of the relative motion of satellites flying in a formation. We study the relative satellite motion without any restriction as to the plane of the satellite orbits as well as their eccentricity and inclination.
Edwin Wnuk, Justyna Golebiewska
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Optimization of a Tetrahedral Satellite Formation
Journal of Spacecraft and Rockets, 2005Two fundamental approaches can be applied to satellite-formation mission design: active control, where satellites exert forces with their thrusters to maintain a constant or periodic geometry for all or part of each orbit, and natural, where satellite orbits are designed to naturally assemble a geometry for all or part of each orbit to within a ...
Daniel Chavez Clemente, Ella M. Atkins
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Formation of satellite and ring systems: Comparatve aspects
Earth, Moon, and Planets, 1994There are four systems of a massive central body with a regularily structured satellite system in the Solar system: the planetary system and the satellite systems of Jupiter, Saturn and Uranus. Comparable structures in these four systems can be understood as indications for comparable processes of origin and formation.
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LISA satellite formation control
Advances in Space Research, 2007Abstract The joint ESA–NASA Laser Interferometer Space Antenna (LISA) mission consists of a triangular formation of three satellites aiming at detecting gravitational waves. In linear approximation the LISA satellites describe a circle around a reference point, maintaining a fixed position with respect to each other.
J.J.C.M. Bik +2 more
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The Formation of Leningrad's Satellite Places
Soviet Geography, 1962AbstractThe development of Leningrad's suburban zone began mainly in the Soviet period with the growth of “dormitory” satellites of the central city. Many of the city's satellites perform the same industrial and cultural functions as Leningrad itself. The distribution of commuter areas is analyzed on the basis of winter commutation tickets. In addition
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Cloud Formations Seen by Satellite
1987Meteorological satellites have made possible the recognition of cloud formations on scales which are not susceptible to ordinary single observer reporting or discovery by weather chart analysis. These formations are of fundamental importance because they represent many of the meso-scale mechanisms.
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