Search Results - "low Earth orbit"
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Remote automated multi-generational growth and observation of an animal in low Earth orbit
Published 2012“…Here, we use a remote automated culture system to successfully grow an animal in low Earth orbit for six months. Our observations, over 12 generations, demonstrate that the multi-cellular soil worm Caenorhabditis elegans develops from egg to adulthood and produces progeny with identical timings in space as on the Earth. …”
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Enhancement Of Transmission Control Protocol Performance Over Low Earth Orbit Satellite Links
Published 2003“…Recent growth of the Internet has led to the development of Internet services everywhere and over every possible communications medium. Here, Low Earth Orbit (LEO) Satellite has been addressed as a medium for supporting services based on the Transmission Control Protocol (TCP). …”
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Numerical solution of a pursuit-evasion differential game involving two spacecraft in low earth orbit
Published 2015“…This paper considers a spacecraft pursuit-evasion problem taking place in low earth orbit. The problem is formulated as a zero-sum differential game in which there are two players, a pursuing spacecraft that attempts to minimize a payoff, and an evading spacecraft that attempts to maximize the same payoff. …”
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The development and performance evaluation of Particle Filter–H∞ Filter for attitude estimation of a small satellite in low earth orbit
Published 2023“…The novel Particle Filter–H∞ Filter was developed and executed in a MATLAB simulation environment, in which an attitude determination system combining the relevant satellite environment models (the Simplified General Perturbations 4 orbit propagation model, the International Geomagnetic Reference Field model, the Sun position model), as well as three-axis magnetometer and sun sensor models and Euler’s equations for rigid body dynamics, including different simulation scenarios for a 3U CubeSat in low Earth orbit, was examined to verify the novel estimator. …”
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A Sensitivity Study of POD Using Dual-Frequency GPS for CubeSats Data Limitation and Resources
Published 2020Subjects: “…CubeSat; precise orbit determination; GNSS; low earth orbit…”
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Absolute and relative POD of LEO satellites in formation flying: Undifferenced and uncombined approach
Published 2023Subjects: “…Low Earth Orbit (LEO)…”
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Advantages and Limitations of using the Murchison Widefield Array for Space Surveillance: a Feasibility Study
Published 2021“…The rapid increase in the density of human-made objects in Low Earth Orbit has raised concerns about the possible onset of the Kessler effect. …”
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Optimisation of congestion window for TCP adaptation to LEO satellite networks
Published 2004“…An optimum mechanism is proposed to adjust congestion window size for enhancing transmission control protocol (TCP) in low earth orbit (LEO) satellite networks. The proposed mechanism adapts between fast throughput recovery and severe congestion avoidance by considering losses in two successive windows. …”
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Satellite orbit and attitude simulator: design and implementation
Published 2013“…Numerical examples showing the analysis and performance using this tool is presented for a low Earth orbit satellite.…”
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Non-fragile guaranteed cost control for robust spacecraft orbit transfer with small thrust
Published 2011“…This paper studies the robust orbit transfer problem for low earth orbit spacecraft rendezvous with parameter uncertainties and subject to input constraint and guaranteed cost control. …”
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Prediction and ephemeris fitting of LEO navigation satellites orbits computed at the antenna phase center
Published 2024“…Nowadays, Low Earth Orbit (LEO) satellites are proposed to augment the Positioning, Navigation and Timing (PNT) service of the GNSS satellites by directly transmitting navigation signals. …”
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POD of small LEO satellites based on precise real-time MADOCA and SBAS-aided PPP corrections
Published 2021“…For real-time precise orbit determination (POD) of low earth orbit (LEO) satellites, high-accuracy global navigation satellite system (GNSS) orbit and clock products are necessary in real time. …”
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New algorithm for attitude and orbit determination using magnetic field measurements
Published 2015“…The al-gorithm is applied to a spacecraft in low Earth orbit utilizing magnetic meas-urements and actuation only. …”
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Visibility of LEO satellites under different ground network distributions
Published 2022“…The Low Earth Orbit (LEO) satellites have shown various benefits in augmenting the Positioning, Navigation and Timing (PNT) service based on Global Navigation Satellite Systems (GNSSs). …”
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Doppler Positioning Using Multi-Constellation LEO Satellite Broadband Signals as Signals of Opportunity
Published 2025“…This paper investigates the potential of signals of opportunity for positioning using broadband low Earth orbit constellations. We developed analytical absolute and differential models based on Doppler-shift observations from multi-constellation satellite bursts across various frequency ranges. …”
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