Results 11 to 20 of about 73,199 (242)
Satellite Transcripts Locally Promote Centromere Formation [PDF]
Developmental Cell, 2017 Centromeric transcription is a common eukaryotic centromere feature, yet it is unclear how transcription is linked to underlying repetitive satellite sequences. In this issue of Developmental Cell, McNulty et al. (2017) show for human centromeres that all α-satellite sequences are transcribed into chromatin-bound RNAs and are required for centromere ...
Carlos, Perea-Resa, Michael D, Blower
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Ocean Surface Topography Altimetry by Large Baseline Cross-Interferometry from Satellite Formation
Remote Sensing, 2020 Imaging Radar Altimeter (IRA) is the current development tendency for ocean surface topography (OST) altimetry, which utilizes Synthetic Aperture Radar (SAR) and interferometry to improve the spatial resolution of OST to several kilometers or even better.
Weiya Kong +4 more
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IEEE Access, 2023 In this study, an H∞ attack-tolerant decentralized observer-based formation tracking control strategy is designed for the network control system (NCS) of large-scale LEO satellite team under external disturbance and attack signal. First, smoothing
Bor-Sen Chen, Hung-Yu Lin
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Formation Satellite Reconstruction Strategy Based on NSGA-II Algorithm
Shanghai Jiaotong Daxue xuebao, 2021 Aimed at the problem of avoidance strategy of formation satellites when facing the threat of space debris, a non-dominated sorting genetic algorithm (NSGA-II) is improved and used to code satellites. Besides, the improved differential evolution algorithm
SUN Hongqiang +2 more
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Formation of Giant Planet Satellites [PDF]
The Astrophysical Journal, 2020 Abstract Recent analyses have shown that the concluding stages of giant planet formation are accompanied by the development of a large-scale meridional flow of gas inside the planetary Hill sphere. This circulation feeds a circumplanetary disk that viscously expels gaseous material back into the parent nebula, maintaining the system in a
Batygin, Konstantin +1 more
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Novel virtual satellite formation scheme for deterministic transmission
Tongxin xuebao, 2023 Although satellite formation flying could effectively support deterministic transmission due to its stable formation, but its formation control required significant real-time computational overhead and did not support flexible deployment for multi ...
Chuan XU +4 more
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Energy cost analysis to station keeping for satellite formation type “TerraSAR-X - TanDEM-X”
RUDN Journal of Engineering Research, 2019 The maintenance of a given configuration of the satellite formation of the “TerraSAR-X - TanDEM-X” type is considered. It is assumed that the master satellite performs only maneuvers to maintain the working orbit, and the slave satellite performs ...
Andrey A. Baranov, Nikita V. Chernov
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Dynamic Network Formation for FSO Satellite Communication
Applied Sciences, 2022 Satellite network optimization is essential, particularly since the cost of manufacturing, launching and maintaining each satellite is significant. Moreover, classical communication optimization methods, such as Minimal Spanning Tree, cannot be applied ...
Revital Marbel +3 more
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Robust Satellite Formation Flying Controller Design Subject to Communication Delays
IEEE Access, 2020 A robust control method is proposed to address the satellite formation flying problem subject to communication delays. Each satellite dynamics involves nonlinear dynamics, parametric uncertainties, and external disturbances.
Yue Gao, Hao Liu, Yu Tian
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Tidal Truncation of Circumplanetary Disks Fails above a Critical Disk Aspect Ratio
The Astrophysical Journal, 2023 We use numerical simulations of circumplanetary disks to determine the boundary between disks that are radially truncated by the tidal potential and those where gas escapes the Hill sphere. We consider a model problem, in which a coplanar circumplanetary
Rebecca G. Martin +3 more
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