Results 31 to 40 of about 688,541 (286)
Satellite Orbital Drag During Magnetic Storms [PDF]
Space Weather, 2019 AbstractWe investigate satellite orbital drag effects at low‐Earth orbit associated with thermosphere heating during magnetic storms caused by coronal mass ejections. CHAllenge Mini‐satellite Payload (CHAMP) and Gravity Recovery And Climate Experiment (GRACE) neutral density data are used to compute orbital drag.
D. M. Oliveira, E. Zesta
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Thermospheric mass density measurement from precise orbit ephemeris
Geodesy and Geodynamics, 2016 Atmospheric drag, which can be inferred from orbit information of low-Earth orbiting (LEO) satellites, provides a direct means of measuring mass density.
Junyu Chen, Jizhang Sang
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Space Weather, 2022 The Starlink satellites launched on 3 February 2022 were lost before they fully arrived in their designated orbits. The loss was attributed to two moderate geomagnetic storms that occurred consecutively on 3–4 February.
Dong Lin +7 more
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Emulating Satellite Drag from Large Simulation Experiments [PDF]
SIAM/ASA Journal on Uncertainty Quantification, 2019 44 pages; 16 figures; 6 ...
Furong Sun +4 more
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Space Weather, 2023 We present results from a study of the time lags between changes in the energy flow into the polar regions and the response of the thermosphere to the heating.
Daniel R. Weimer +3 more
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Minimum thrust levels for spinning drag-free satellites [PDF]
Automatica, 1975 Abstract A drag-free satellite, which contains an internal unsupported proof mass, is shielded form external forces such as solar pressure. Thrustors force via a linear control law with a deadband - the satellite to follow the proof mass and hence the satellite follows an almost purely gravitational orbit.
Geert Jan Olsder, J. David Powell
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Unexpected space weather causing the reentry of 38 Starlink satellites in February 2022
Journal of Space Weather and Space Climate, 2022 The accidental reentry of 38 Starlink satellites occurred in early February 2022, associated with the occurrence of moderate magnetic storms. A poorly understood structure of Coronal Mass Ejections (CMEs) caused the magnetic storms at unexpected timing ...
Kataoka Ryuho +6 more
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Drag coefficients with applications to satellite orbits [PDF]
, 1989 In the last twenty or so years the results of theory and experiment have produced much information on the characteristics of gas-surface interactions relevant to a satellite in hyperthermal free-molecular flow. This thesis contains reviews of the rarefied gas dynamics applicable to satellites and has attempted to compare existing models of gas-surface ...
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Test Mass Capture Control for Drag-Free Satellite Based on State-Dependent Riccati Equation Method
ActuatorsThe drag-free satellite plays an important role in the space-based gravitational wave observatory. The capture control of test mass after release is a crucial technology that can affect the success of the mission.
Yingjie Chen +4 more
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Advanced Healthcare Materials, EarlyView.Magnetically responsive nanoparticles enable remote control over biomaterials, cells, and engineered tissues. This review summarizes material design, biological safety, fabrication and actuation strategies, computational validation, and translational pathways that support the development of magnetic tissue‐engineering platforms and future magnetically ...
Konstantinos Ioannidis +8 more
wiley +1 more source