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Electric propulsion for communications satellites
7th Communications Satellite Systems Conference, 1978Electric propulsion systems derive their low overall mass, relative to chemical propulsion systems, from an optimized mix of independently controlled power and mass flow rate. A significant reduction in mass can be secured by substituting electric propulsion for conventional hydrazine systems for all the major propulsion tasks of a communications ...
B. FREE, W. GUMAN, B. HERRON, S. ZAFRAN
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Propulsion requirements for communications satellites
9th Electric Propulsion Conference, 1972The concept of characteristics thrust is introduced herein as a means of classifying propulsion system tasks related particularly to geosynchronous communications spacecraft. Approximate analytical models are developed to permit estimation of characteristic thrust for injection error corrections, orbit angle re-location, north-south station keeping ...
W. ISLEY, K. DUCK
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Hybrid Propulsion System for Satellite
31st AIAA International Communications Satellite Systems Conference, 2013Nowadays Environmental concerns are in the forefront of public attention and it’s destined to increase its importance for the future. To this aim Clean Technologies for Space are required to be adopted for the future in order to contribute to the reduction of the environmental impact of Space Programmes.
Loredana Sollazzo +5 more
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Electric propulsion for small satellites
Plasma Physics and Controlled Fusion, 2014Propulsion is required for satellite motion in outer space. The displacement of a satellite in space, orbit transfer and its attitude control are the task of space propulsion, which is carried out by rocket engines. Electric propulsion uses electric energy to energize or accelerate the propellant.
Michael Keidar +7 more
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Electromagnetic propulsion of satellites
Acta Astronautica, 2008Abstract A propulsion system using the electromagnetic repulsion between two parallel conductors, carrying in opposite directions high currents, is considered. Very high projection velocities, above 70 000 m/s, are expected, corresponding with a thrust reaching 200 000 N. Such propulsion system can operate in pulsed conditions, throwing 10 -
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Drag and propulsion of large satellites in the ionosphere: An Alfvén propulsion engine in space
Journal of Geophysical Research, 1965There is a motionally induced charge separation in a conductor moving across magnetic field lines. This charge may be conducted away, resulting in a dc current flow through the conductor if it moves through a plasma. The generation of Alfven waves is a mechanism particularly effective for circulating the charge for very large conductors moving in or ...
S. D. Drell, H. M. Foley, M. A. Ruderman
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Propulsion Requirements for Controllable Satellites
ARS Journal, 1961Propulsion requirements are determined for several controllable satellite missions. High thrust propulsion syslems such as chemical rockets and low thrust propulsion systems such as ion rockets are considered. Rendezvous missions are treated by determining minimum fuel maneuvers for small, simultaneous changes in the elements of quasi-circular orbits ...
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Microchip laser propulsion for small satellites
37th Joint Propulsion Conference and Exhibit, 2001In this work we propose a pulsed microchip laser thruster (MLT) concept for secondary propulsion on microand nanosatellites. Thrust is developed by laser-induced ablation of solid propellant targets. At the heart of the MLT concept is an on-board microchip laser that, when pumped by an on-board cw diode laser, emits pulsed IR radiation at sub ...
David Gonzales, Robert Baker
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Radiofrequency in propulsion application to commercial satellites
25th Joint Propulsion Conference, 1989Application of the RITA ion propulsion system for the Eureca and SAT-2 missions is considered. In the RITA-10 system, xenon is stored at 50-60 bar in a pressure tank, a pressure reduction device reduces the variable high pressure to a constant pressure of 1.5 bar, and a single unit controls the mass flow independently for both the thruster and the ...
H. BASSNER, H.-P. BERG, R. KUKIES
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Small satellite electric propulsion options
Intersociety Energy Conversion Engineering Conference, 1994Low power electric propulsion offers attractive options for small satellite propulsion. Applications include orbit raising, orbit maintenance, attitude control, repositioning, and deorbit of both Earth-space and planetary spacecraft. Potential electric propu+lsion technologies include very low power arcjets, Hall thrusters, and pulsed plasma thrusters,
Roger Myers +2 more
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