Results 261 to 270 of about 107,388 (298)
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Low Earth Orbit Satellite Radio Networks
1997A global phone company may sound a curious statement in an industry still dominated by state-owned monopolies which mainly work within their national borders. But it is a concept whose time has come as, practically everywhere, governments either privatize or think of privatizing and deregulating their phone markets.
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Exploring Positioning Through Pseudoranges Using Low Earth Orbit Satellites
2022Abstract: For decades, Global Navigation Satellite Systems (GNSS) have been dominant in the Positioning, Navigation and Timing (PNT) market. Improvements have been made to the design and implementation throughout the years. Recently, however, growing demand has emerged for alternative PNT solutions.
Van Uytsel, Wout +3 more
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Low Earth Orbit Satellite's Orbit Propagation and Determination
2014Abstract : This paper represents orbit propagation and determination of Low Earth Orbit(LEO) satellites, which is immediate orbit satellite positioning. Beiseds, satellite global positioning system (GPS) configured satellite receiver provides position and velocity measures by navigating the filter to get the coordinates of the orbit propagation (OP ...
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Magnetic Attitude Control System for Low-Earth Orbit Satellites
Multibody System Dynamics, 2001The stabilization of a small spacecraft on the low-Earth orbit is done by a three-axis magnetometer. Both orbital motion parameters and attitude can be estimated by the vector function Lyapunov method. The authors also propose a recursive state estimation algorithm with enhanced convergence.
Lebedev, D., Tkachenko, A.
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Yaliny's protocol for low earth orbit satellites
2015 IEEE East-West Design & Test Symposium (EWDTS), 2015This paper presents a modification of CCSDS 131.2-R-2/DVB-S2 standard developed by Yaliny Engineering. The modification has special features — Doppler offset compensation with prior information, low latency synchronization scheme, which allows for its use on LEO satellites and patent-free LDPC codec.
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Precise Autonomous Orbit Maintenance of a Low Earth Orbit Satellite
Journal of Aerospace Engineering, 2018AbstractIn this paper, the problem of precise autonomous orbit maintenance of a satellite using output feedback and quadratic optimal regulators in a low Earth orbit is investigated.
Hossein Bolandi, Saeed Abrehdari
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COMMUNICATIONS DURATION WITH LOW EARTH ORBITING SATELLITES
2007Communication via satellite begins when the satellite is positioned in the desired orbital position. The satellite’ s coverage area on the Earth depends on orbital parameters. Ground stations can communicate with LEO (Low Earth Orbiting) satellites only when the satellite is in their visibility region.
Cakaj, Shkelzen +2 more
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Ground Station for Low Earth Orbit Satellites
2022Ground stations are essential for satellite operations as they are used to send commands to satellites, receive the satellite telemetry information and payload data. We constructed a ground station for UHF and VHF band two-way communication with low Earth orbit satellites and prepared for installation an X-band downlink ground station.
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Low earth orbit satellite based communication systems — Research opportunities
European Journal of Operational Research, 1997zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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Low Earth Orbit Satellite Security and Reliability: Issues, Solutions, and the Road Ahead
IEEE Communications Surveys and Tutorials, 2023Pingyue Yue, Jianping An, Jiankang Zhang
exaly