Space Weather, 2023 We examine the accuracy of density prediction by the first principles model Thermosphere Ionosphere Electrodynamics General Circulation Model (TIEGCM) developed by the National Center for Atmospheric Research and compare it to the accuracy of three ...
R. L. Walterscheid +5 more
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Data‐Driven Satellite Drag Modeling Without Dynamic Knowledge of the Atmosphere
Space WeatherIncreasing congestion in low Earth orbit (LEO) from new satellite deployments and a growing debris population has made accurate orbital trajectory prediction essential for anticipating and avoiding potential collisions on a regular basis.
William E. Parker, Richard Linares
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Uncertainty Propagation and Filtering via the Koopman Operator in Astrodynamics [PDF]
Journal of Spacecraft and Rockets, 2023 The Koopman Operator (KO) theory is applied to generate an analytical solution of dynamical systems. The approach proposed in this work exploits a novel derivation of the KO with orthogonal polynomials to represent and propagate uncertainties, where the ...
Simone Servadio, W. Parker, R. Linares
semanticscholar +1 more source
Message from the Guest Editors of the Special Issue on Astrodynamics and Engineering Aspects of Hayabusa2—Sample Return Mission to the Asteroid Ryugu [PDF]
Astrodynamics, 2020 Yuichi Tsuda +3 more
openalex +2 more sources
, 2015 One of the most important uses of vector analysis (cf. Appendix A) is in the concise formulation of physical laws and the derivation of other results from these laws. We will develop and use the differential equations of motion for a body moving under the influence of a gravitational force only. In Chap.
K. F. Wakker
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Development of a Hardware-in-the-loop Simulator for Spacecraft Attitude Control Using Thrusters [PDF]
Journal of Astronomy and Space Sciences, 2009 In this study, a Hardware-In-the-Loop (HIL) simulator using thrusters is developed to validate the spacecraft attitude system. To control the attitude of the simulator, eight cold gas thrusters are aligned with roll, pitch and yaw axis.
Dong-Wook Koh +3 more
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A Preliminary Development of Real-Time Hardware-in-the-Loop Simulation Testbed for the Satellite Formation Flying Navigation and Orbit Control [PDF]
Journal of Astronomy and Space Sciences, 2009 The main purpose of the current research is to developments a real-time Hardware In-the-Loop (HIL) simulation testbed for the satellite formation flying navigation and orbit control.
Jae-Ik Park +4 more
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Design of Orbit Controls for a Multiple CubeSat Mission Using Drift Rate Modulation
Aerospace, 2021 For the low-cost improvement of laser communication, which is critical for various applications such as surveillance systems, a study was conducted on relative distance control based on orbital drift rate modulations for multiple CubeSats during ...
Youngbum Song +3 more
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Autonomous Real-time Relative Navigation for Formation Flying Satellites [PDF]
Journal of Astronomy and Space Sciences, 2009 Relative navigation system is presented using GPS measurements from a single-channel global positioning system (GPS) simulator. The objective of this study is to provide the real-time inter-satellite relative positions as well as absolute positions for ...
Sunhwa Shim +2 more
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The multi-bandgap of local effect phononic crystal
AIP Advances, 2023 A design method of a phononic crystal structure with a local effect is introduced, and the mechanism and influencing factors (elastic modulus, density, local layer thickness) of the bandgap are analyzed. The finite element method is used to calculate the
Yake Dong +3 more
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