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Guo, J. (author), Chang, J. (author), Yao, X. (author), Groeblacher, S. (author)Preparing a massive mechanical resonator in a state with quantum limited motional energy provides a promising platform for studying fundamental physics with macroscopic systems and allows to realize a variety of applications, including precise sensing. While several demonstrations of such ground-state cooled systems have been achieved, in...journal article 2023
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Rometsch, Flavie A.A.S.D.T. (author), Casini, Andrea E.M. (author), Drepper, Anne (author), Cowley, Aidan (author), de Winter, J.C.F. (author), Guo, J. (author)Humans are embarking on a new era of space exploration with the plan of sending crewed spacecraft to the Moon, Mars, and beyond. Extravehicular activities (EVAs) will be an essential part of the scientific activities to be carried out in these missions, and they will involve extensive geological fieldwork. These EVAs entail many challenges as...journal article 2022
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Heiligers, M.J. (author), Guo, J. (author), Vermeulen, J.G.P. (author)Through numerous survey efforts over the past decades, humanity has achieved substantial knowledge of the near-Earth asteroid (NEA) population. Nevertheless, survey completeness at small asteroid sizes is still limited, and unannounced impacts, such as the 2013 Chelyabinsk meteor, are common enough to warrant further identification efforts....conference paper 2022
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Guo, J. (author), Groeblacher, S. (author)The rapid development of high-Q<sub>M</sub> macroscopic mechanical resonators has enabled great advances in optomechanics. Further improvements could allow for quantum-limited or quantum-enhanced applications at ambient temperature. Some of the remaining challenges include the integration of high-Q<sub>M</sub> structures on a chip, while...journal article 2022
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Bezsilla, János (author), Takarics, Bela (author), Vanek, Bálint (author), Guo, J. (author)This article focuses on the validation of a classical PID controller scheme for flexible spacecraft with regards to the effect of parameter uncertainty on system stability and pointing precision. A high-fidelity simulation environment with external disturbances was built in Simulink using a control-oriented model of an Earth-observing...journal article 2022
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Guo, J. (author), Groeblacher, S. (author)Preparing macroscopic mechanical resonators close to their motional quantum groundstate and generating entanglement with light offers great opportunities in studying fundamental physics and in developing a new generation of quantum applications. Here we propose an experimentally interesting scheme, which is particularly well suited for...working paper 2022
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Guo, J. (author)The work in this thesis focuses on potential ways to bring a macroscopic mechanical<br/>resonator in a classical environment into the quantum regime with integrated cavity<br/>optomechanics...doctoral thesis 2021
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Zhang, Fan (author), Zhou, He (author), Huang, Panfeng (author), Guo, J. (author)The tethered formation system has been widely studied due to its extensive use in aerospace engineering, such as Earth observation, orbital location, and deep space exploration. The deployment of such a multitethered system is a problem because of the oscillations and complex formation maintenance caused by the space tether's elasticity and...journal article 2021
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Saathof, R. (author), Speretta, S. (author), Guo, J. (author), Kuiper, J.M. (author), Gill, E.K.A. (author)Laser satellite communications provides an attractive application for optical communications. It provides more bandwidth with improved security at potentially a lower cost due to reduced size weight and power (SWAP) and reduced license cost compared to radio frequencies (RF) communications. These advantages have been recognized for years and...abstract 2021
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Spaander, Joshua (author), Guo, J. (author)Presentation at the 2nd optical wireless communication conference 28-9-2021other 2021
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Spaander, Joshua (author), Guo, J. (author)Free-space optical communication has proven to have many advantages over traditional radio communications. For instance, the hardware power efficiency and limited beam spread increase data rates for lower power consumption. Furthermore, the technology does not suffer from decreased bandwidth due to crowding. Free-space optical communication is...conference paper 2021
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Mok, S. (author), Guo, J. (author), Gill, E.K.A. (author), Rajan, R.T. (author)Orbiting Low Frequency Array for Radio Astronomy (OLFAR) is a radio astronomy mission that has been studied since 2010 by several Dutch universities and research institutes. The mission aims at producing sky maps by collecting cosmic signals at ultra-low wavelengths regimes, below the 30 MHz frequency band. A satellite swarm comprising more than...conference paper 2020
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Mok, S. (author), Guo, J. (author), Gill, E.K.A. (author), Rajan, R.T. (author)Employing a satellite swarm for radio astronomy has been continuously addressed in the Orbiting Low Frequency ARray (OLFAR) project. A 100 km diameter of aperture array constructed by distributed satellites will be able to provide sky maps of better than 1 arc-minute spatial resolution at 10 MHz. However, an orbit design strategy for the...conference paper 2020
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Carvajal Godínez, J. (author), Guo, J. (author), Gill, E.K.A. (author)Bus saturation is deemed as one of the primary causes of delays in the data propagation between spacecraft components. However, the conditions under which bus congestion can affect measurements variability were not well characterized before. This paper presents a bus saturation model and a set of experiments to characterize the bus...journal article 2019
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Guo, J. (author), Norte, R.A. (author), Groeblacher, S. (author)Preparing mechanical systems in their lowest possible entropy state, the quantum ground state, starting from a room temperature environment is a key challenge in quantum optomechanics. This would not only enable creating quantum states of truly macroscopic systems, but at the same time also lay the groundwork for a new generation of quantum...journal article 2019
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Zhu, L. (author), Guo, J. (author), Gill, E.K.A. (author)Induction-based reaction spheres have been presented in many references and their performances are normally investigated through experiments or numerical simulations which are time-consuming. Here, an analytical way is presented and it enables researchers to evaluate a new design quickly. In this article, the presented performance analysis is...journal article 2019
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Coppola, Mario (author), Guo, J. (author), Gill, E.K.A. (author), de Croon, G.C.H.E. (author)In this paper we present a procedure to automatically design and verify the local behavior of robots with highly limited cognition. All robots are: anonymous, homogeneous, non-communicating, memoryless, reactive, do not know their global position, do not have global state information, and operate by a local clock. They only know: (1) the...journal article 2019
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Coppola, M. (author), Guo, J. (author), Gill, E.K.A. (author), de Croon, G.C.H.E. (author)This work proposes PageRank as a tool to evaluate and optimize the global performance of a swarm based on the analysis of the local behavior of a single robot. PageRank is a graph centrality measure that assesses the importance of nodes based on how likely they are to be reached when traversing a graph. We relate this, using a microscopic...journal article 2019
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Zheng, Z. (author), Guo, J. (author), Gill, E.K.A. (author)This paper presents an onboard autonomous mission re-planning system for Multi-Satellites System (MSS) to perform onboard re-planing in disruptive situations. The proposed re-planning system can deal with different potential emergency situations. This paper uses Multi-Objective Hybrid Dynamic Mutation Genetic Algorithm (MO-HDM GA) combined...journal article 2018
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- Pinto Moura, J.P. (author), Norte, R.A. (author), Guo, J. (author), Schäfermeier, C. (author), Groeblacher, S. (author) journal article 2018