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Bouwmeester, J. (author), Radu, S. (author), Uludag, M.S. (author), Chronas, N. (author), Speretta, S. (author), Menicucci, A. (author), Gill, E.K.A. (author)PocketQubes are a form factor of highly miniaturized satellites with a body of one or more cubic units of 5 cm. In this paper, the characteristics of PocketQubes in terms of their constraints and their (potential) utility are treated. To avoid space debris and limit collision risk, the orbits of PocketQubes need to be constraint. An analysis...journal article 2020
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Speretta, S. (author), Uludag, M.S. (author), Karunanithi, Visweswaran (author), Radu, S. (author), Chronas Foteinakis, N. (author), Bouwmeester, J. (author), Menicucci, A. (author), Gill, E.K.A. (author)This paper presents the design of a multi-frequency deployable antenna system for femto-satellites as part of the Delfi-PQ project, a PocketQube with a size of 50x50x178 mm which is being developed by the Delft University of Technology. This new form factor brings its own challenges on every subsystem and it is seen as a stepping stone towards...conference paper 2019
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Uludag, M.S. (author), Yakut, Erdinc (author), Speretta, S. (author), Radu, S. (author), Chronas Foteinakis, N. (author), Bouwmeester, J. (author), Menicucci, A. (author), Gill, E.K.A. (author)PocketQubes represent a new type of cube-shaped platforms with dimensions of 50x50 mm and mass of 250 g. Just like the CubeSats, these platforms are also split in units which are referred to as 1P. The Delft University of Technology has been working on Delfi-PQ, a 3P PocketQube with the dimensions of 50x50x178 mm. This miniaturized size brings...conference paper 2019
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Bouwmeester, J. (author), Radu, S. (author), Uludag, M.S. (author), Chronas Foteinakis, N. (author), Speretta, S. (author), Menicucci, A. (author), Gill, E.K.A. (author)PocketQubes are a new form factor of highly miniaturized satellites with a body of one or more cubic units of 5 cm. The characteristics of PocketQubes in terms or legal and regulatory aspects, the technological readiness levels and financial considerations are assessed. In particular, an analysis of orbital decay characteristics has been carried...conference paper 2018
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Bouwmeester, J. (author), van der Linden, S. P. (author), Povalac, A. (author), Gill, E.K.A. (author)Developers experience issues with the compatibility, connector size and robustness of electrical interface standards for CubeSats and PocketQubes. There is a need for a lean and robust electrical interface standard for these classes of satellites. The proposed interface standard comprises a linear data bus which is used for housekeeping data,...journal article 2018
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Davidovikj, D. (author), Bouwmeester, Damian (author), van der Zant, H.S.J. (author), Steeneken, P.G. (author)We report on a pneumatically coupled graphene pump system, comprising two cylindrical cavities of 3 femtoliter connected by a narrow trench, all covered by a thin few-layer graphene membrane. Local electrodes at the bottom of each cavity enable electrostatic pressure control and manipulation of gas flow through the channel. Using laser...conference paper 2018
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Davidovikj, D. (author), Bouwmeester, Damian (author), van der Zant, H.S.J. (author), Steeneken, P.G. (author)We report on the development of a pneumatically coupled graphene membrane system, comprising of two circular cavities connected by a narrow trench. Both cavities and the trench are covered by a thin few-layer graphene membrane to form a sealed dumbbell-shaped chamber. Local electrodes at the bottom of each cavity allow for actuation of each...journal article 2018
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Bouwmeester, J. (author), Gill, E.K.A. (author), Speretta, S. (author), Uludag, M.S. (author)The dominant architectural approach in CubeSats and PocketQubes is the use of modular physical units, each hosting (part of the) components of classical (virtual) subsystems. Many of these small satellites, however, also host subsystems or experiments with slightly alternative approach, e.g. with cellularization of components or the integration...journal article 2018
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Radu, S. (author), Uludag, M.S. (author), Speretta, S. (author), Bouwmeester, J. (author), Gill, E.K.A. (author), Chronas Foteinakis, N. (author)Delft University of Technology has embarked on PocketQubes to showcase as the next class of miniaturized satellites. In the past decade, CubeSats have grown towards a successful business with mature capabilities. PocketQubes, however, are still in their infancy. The small size of the PocketQubes will trigger innovations in miniaturization and...conference paper 2018
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Langer, Martin (author), Weisgerber, Michael (author), Bouwmeester, J. (author), Hoehn, Alexander (author)For many years, traditional satellite design philosophy was dominated by highly reliable components, conservative designs and extensive performance testing at subsystem and integrated system levels to achieve long lifetimes in the harsh space environment. CubeSats attempted to choose a different philosophy, utilizing suitable state-of the art...conference paper 2017
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Bouwmeester, J. (author), Gill, E.K.A. (author), Speretta, S. (author), Uludag, M.S. (author)The dominant architectural approach in CubeSats and PocketQubes is the use of modular physical units, each hosting (part of the) components of classical (virtual) subsystems. Many of these small satellites, however, also host<br/>subsystems or experiments with slightly alternative approach, e.g. with cellularization of components or the...conference paper 2017
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Uludag, M.S. (author), Speretta, S. (author), Gill, E.K.A. (author), Bouwmeester, J. (author), Pérez Soriano, T. (author)Due to strict constraint regarding the volume of a PocketQube (50x50x50 mm) it is crucial to reduce the space that is consumed by the satellite bus subsystems. This paper focuses on a new architecture for the electrical subsystem in order to reduce its volume and increase the usage of empty surfaces inside the satellite. This increment in volume...conference paper 2017
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Machin Llanos, Jorge (author), Bouwmeester, J. (author)There are several benefits of using autonomous sensors in spacecraft. Avoidance of wired connections reduces cost, mass, and increases the flexibility and reliability of the system. The impact of wire reduction can be significant, especially for small satellites with many sensors, like temperature and sun sensors. Previous research has already...conference paper 2017
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Zhang, W. (author), Martinelli, J. (author), Peters, J.A. (author), van Hengst, Jacob M.A. (author), Bouwmeester, Hans (author), Kramer, Evelien (author), Bonnet, Celia S. (author), Szeremeta, Frederic (author), Toth, Eva (author), Djanashvili, K. (author)Surface PEGylation of nanoparticles designed for biomedical applications is a common and straightforward way to stabilize the materials for in vivo administration and to increase their circulation time. This strategy becomes less trivial when MRI active porous nanomaterials are concerned as their function relies on water/proton-exchange between...journal article 2017
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van der Linden, Steven (author), Bouwmeester, J. (author), Povolac, A. (author)Since the first successful CubeSat missions in the early 2000s, payloads for this form factor have emerged and have increased in technical performance level. This trend is likely to continue in the near future. However, despite the subsequent increase in data load and the increasing modularity of components, there are no clear trends for a new...conference paper 2016
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Langer, M (author), Bouwmeester, J. (author)In this paper we investigate the data on 178 launched CubeSats and conduct a nonparametric and parametric analysis, where the dead-on-arrival (DOA) cases as well as the subsystem contribution to failure are specifically addressed. Using Maximum Likelihood Estimation, a Single Weibull and a 2-Weibull mixture parametric model are fitted to the non...conference paper 2016
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Bouwmeester, J. (author), Langer, M (author), Gill, E.K.A. (author)This paper provides results and conclusions on a survey on the implementation and reliability aspects of CubeSat bus interfaces, with an emphasis on the data bus and power distribution. It provides recommendations for a future CubeSat bus standard. The survey is based on a literature study and a questionnaire representing 60 launched CubeSats...journal article 2016
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Speretta, S. (author), Pérez Soriano, T. (author), Bouwmeester, J. (author), Carvajal Godínez, J. (author), Menicucci, A. (author), Watts, T.G. (author), Sundaramoorthy, P.P. (author), Guo, J. (author), Gill, E.K.A. (author)<b>In the last two decades, CubeSats have changed the perception of satellite missions aided by standardization and usage of commercial-off-the-shelf components. CubeSats have also proven the feasibility of low cost and short development time space missions. The PocketQube with a form factor of 5x5x5 cm has been...conference paper 2016
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- Meijerman, E. (author), Andringa, M. (author), Bouwmeester, S. (author) conference paper 2013
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Van der Sar, T. (author), Hagemeier, J. (author), Pfaff, W. (author), Heeres, E. (author), Thon, S. (author), Kim, H. (author), Petroff, P. (author), Oosterkamp, T. (author), Bouwmeester, D. (author), Hanson, R. (author)Single quantum emitters can be coupled to photonic crystal (PC) cavities by placing their host nanoparticles into the cavity field. We describe fabrication, characterization, and tuning of gallium-phosphide PC cavities that resonate in the visible, and simulations and measurements of the effect of a nanoparticle on the optical properties of...journal article 2012