Results 61 to 70 of about 1,149 (246)
IEEE Access, 2020 In this paper, the fast integral terminal sliding mode control for spacecraft formation flying system is concerned subjected to external disturbances and parametric uncertainties. First, a novel modified fast integral terminal sliding mode control law is
Xiaohan Lin, Xiaoping Shi, Shilun Li
doaj +1 more source
Global Policy, EarlyView.ABSTRACT The European Union's proposed Space Law aims to establish a unified approach for sustainable space activities across the EU. While the EU's satellite constellations contribute to sustainability efforts, they can also have negative environmental impacts.
Elena Cirkovic, Vitali Braun
wiley +1 more source
International Journal of Aerospace Engineering, 2015 As centralized state estimation algorithms for formation flying spacecraft would suffer from high computational burdens when the scale of the formation increases, it is necessary to develop decentralized algorithms.
Mengyuan Dai +3 more
doaj +1 more source
Out There No One Has a Right to Die
Bioethics, EarlyView.ABSTRACT The eventual goal of space exploration is to colonize exoplanets and their moons outside our solar system. This is a dangerous and immoral endeavour. The extraterrestrial life forms encountered would be hostile, vulnerable or both, and the descendants of the original pioneers would be involuntarily exposed to hazardous conditions and ...
Matti Häyry
wiley +1 more source
Low Thrust Augmented Spacecraft Formation-Flying [PDF]
, 2015 Ballistic spacecraft formation-flying with zero thrust has great utility, but it is limited to\ud a comparatively small set of relative trajectories. However, through the application of continuous\ud low thrust, rich new families of formation-flying trajectories can be accessed.
Arnot, Callum S., McInnes, Colin R.
openaire
Satellite Formation Flying Determination with Low-Cost GNSS Receivers Raw Data
Remote SensingLow-cost missions are ideal for applications that require spacecraft formation flying. The use of GNSS signals provides an economical solution to determine the orbital status of the formation.
David Forero +2 more
doaj +1 more source
IEEE Access, 2020 Radio frequency (RF) relative measurement provides an effective means of communication and autonomous navigation for the spacecraft formation flying. Multipath and Doppler are two main factors that affect the accuracy of RF relative measurement.
Weiqing Mu +3 more
doaj +1 more source
Recovery From Anorexia Nervosa: A Concept Analysis
Journal of Advanced Nursing, EarlyView.ABSTRACT Aim Despite decades of research, we still know surprisingly little about how best to bring about lasting recovery from anorexia nervosa (AN). Furthermore, there is a lack of consensus in the research and treatment communities about what constitutes recovery from AN, or whether “recovery” is even an appropriate term to use in this context.
Sarah Ramsay, Kendra Allison
wiley +1 more source
Neural-Network Based Finite-Time Coordinated Formation Control for Spacecraft Without Unwinding
IEEE Access, 2020 This paper investigates the problem of rotation matrix-based attitude synchronization and tracking control for spacecraft formation flying exposed to external disturbance and unknown inertial matrix.
Yong Hao +4 more
doaj +1 more source
Collective Attention in Virtual Teams: A Pathway for Mitigating Communication Delays
Personnel Psychology, EarlyView.ABSTRACT Virtual work has become a defining feature of modern organizations, intensifying the need for strategies that support virtual team performance. Communication delays—prolonged intervals between sending and receiving messages—are one of the most persistent and consequential barriers to virtual team performance.
Dorothy Carter +9 more
wiley +1 more source