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Maessen, D.C. (author), Gill, E.K.A. (author)This paper investigates to what extent the relative orbital elements of two satellites flying in formation can be estimated making use of inter-satellite range measurements only. Since the determination of relative orbital elements does not require the orientation of the relative orbit with respect to absolute inertial space to be resolved, as...conference paper 2010
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Massioni, P. (author), Keviczky, T. (author), Gill, E.K.A. (author), Verhaegen, M. (author)In this paper, we consider the problem of designing a distributed controller for a formation of spacecraft following a periodic orbit. Each satellite is controlled locally on the basis of information from only a subset of the others (the nearest ones). We describe the dynamics of each spacecraft by means of a linear time-periodic (LTP)...journal article 2010
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Gill, E.K.A. (author), Verhoeven, C. (author), Gill, K. (author), De Milliano, M. (author)Operations of satellites in Low-Earth Orbit (LEO) have been based on exploiting the maximum time of visibility of satellites over their ground stations. In this paper, it is shown that a key parameter for communication between a satellite and a ground station is not the time of visibility but the amount of telemetry data which can be transmitted...conference paper 2010
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Guo, J. (author), Maessen, D.C. (author), Gill, E.K.A. (author), Moon, S.G. (author), Zheng, G. (author)FAST (Formation for Atmospheric Science and Technology demonstration) is a cooperative Dutch Chinese formation flying mission led by Delft University of Technology (TU Delft) in the Netherlands and Tsinghua University in China. It is expected to be the first international micro-satellite formation flying mission to achieve objectives in three...conference paper 2009
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Batenburg, P.A.W. (author), Gill, E.K.A. (author), Drijkoningen, G.G. (author), Foing, B.H. (author), Toxopeus, G. (author)A feasibility study is conducted to determine whether reflection seismology systems can be used for planetary geology research. The focus is on systems with up to 20,000 seismic detectors, such as used today in Earth geological research and energy companies. The study follows a top-down systems engineering end-user approach starting with the...conference paper 2009
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Giuditta, N. (author), Gill, E.K.A. (author), Fernández, B. (author), Isaac, D. (author)New network technologies are providing interconnectivity in areas previously unheard of. One of these novel technologies, named Disruption Tolerant Networking (DTN), shows promise for the space industry. In order to study its suitability for University projects, a model of a University space mission has been created using network simulation...conference paper 2009
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Guo, J. (author), Maessen, D.C. (author), Gill, E.K.A. (author)This paper provides a survey of current state-of-the-art technologies of fractionated spacecraft, a new architecture for distributed space systems. The survey covers six aspects: architecture, networking, wireless communication, wireless power transfer, distributed computing, and planned missions implementing this architecture. As a result of...conference paper 2009
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Bentum, M.J. (author), Verhoeven, C.J.M. (author), Boonstra, A.J. (author), Van der Veen, A.J. (author), Gill, E.K.A. (author)OLFAR, Orbiting Low Frequency Antennas for Radio Astronomy, will be a space mission to observe the universe frequencies below 30 MHz, as it was never done before with an orbiting telescope. Because of the ionospheric scintillations below 30 MHz and the opaqueness of the ionosphere below 15 MHz, a space mission is the only opportunity for this as...conference paper 2009
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Gill, E.K.A. (author), Kreisl, J. (author), Verma, D. (author)Successful education of engineers needs continuous adaptation to track the changing needs of industry. The adaptation is not limited to technological advance or to the changing mentality of new students but also to end-to-end engineering approaches using Systems Engineering. However, industries today require more and more engineers with profound...conference paper 2009
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Ohndorf, A. (author), Dachwald, B. (author), Gill, E.K.A. (author)Although low-thrust propulsion is an interesting option for scientific and reconnaissance missions to targets in planetary space, like the Moon, associated transfer strategies pose challenging requirements in terms of optimal control. The method of Evolutionary Neurocontrol (ENC), which has been applied very successfully to interplanetary low...conference paper 2009
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- De Florio, S. (author), Gill, E.K.A. (author), D'Amico, S. (author), Grillenberger, A. (author) conference paper 2009
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Moon, S.G. (author), Hannemann, S. (author), Collon, M. (author), Wielinga, K. (author), Kroesbergen, E. (author), Harris, J. (author), Gill, E.K.A. (author), Maessen, D.C. (author)In the following we review the optimization for microsatellite deployment of a highly integrated payload suite comprising a high resolution camera, an additional camera for stereoscopic imaging, and a single photon counting laser altimeter. This payload suite, the `Stereo Imaging Laser Altimeter' SILAT has been designated for deployment aboard...conference paper 2009
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Aas, C. (author), Zandbergen, B.T.C. (author), Hamann, R.J. (author), Gill, E.K.A. (author)A satellite design tool has been developed offering systems engineers a fast way to analyze the feasibility of a particular design concept. The tool differs from available tools on the market in that it is specifically targeted at small satellites in the mass range of 1-50 kg, and with a limited development time. The tool is developed in Excel,...conference paper 2009
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Aas, C.L.O. (author), Zandbergen, B.T.C. (author), Hamann, R.J. (author), Gill, E.K.A. (author)The process of developing a tool aiming for conceptual design of nano- and microsatellites is described. The various challenges and derived solutions are discussed. The final product offers systems engineers a fast way to analyze the feasibility of a particular design concept. The tool differs from existing tools in that it is specifically...conference paper 2009
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Bone, M. (author), Cloutier, R.L. (author), Gill, E.K.A. (author), Verma, D. (author)There is increased recognition of the role of systems engineering in reducing the risk (technical, cost, and schedule) on complex space systems development and integration projects. A number of international systems engineering standards have been published in the last five years (ISO 15288, IEEE 1220, and EIA 632). Closer to the space domain,...conference paper 2009
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Bouwmeester, J. (author), Gill, E.K.A. (author), Verhoeven, C.J.M. (author)The Delfi Program aims to launch a nano-satellite every 2.5 years with the objectives to give the best education for space engineering, to test and qualify novel space technology and to enhance the nanosatellite platform to open doors for new applications. With Delfi-C3 in orbit, Delfi-n3Xt in development for a launch in 2010 and preliminary...conference paper 2008
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Kruijff, M. (author), Van der Heide, E.J. (author), Ockels, W.J. (author), Gill, E.K.A. (author)The 2nd Young Engineers' Satellite (YES2) is a 36 kg student-built experiment that piggybacked on the Foton-M3 microgravity platform in September 2007. YES2 intended to demonstrate tethered SpaceMail, a concept for frequent sample return originally proposed for the International Space Station (ISS). This paper summarized the YES2 mission results...conference paper 2008
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Gill, E.K.A. (author), Lisi, M. (author), Bousquet, M. (author), Larson, W.J. (author)The space sector needs highly trained personnel. This calls for a continuous learning process comprising post-graduate educational programs. However, the offered programs differ substantially in scope and characteristics, coverage and focus, quality and organization and lack inter-program coordination. To remedy this, a Virtual Space Academy has...conference paper 2008
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Gill, E.K.A. (author), Maessen, D. (author), Laan, E. (author), Zheng, G.T. (author)Large current uncertainties in the characteristics of aerosols in the Earth’s atmosphere preclude meaningful climate model evaluation. The FAST mission will contribute to the characterization of aerosols and their relation to climate change through a synoptic evaluation of local, regional and global aerosol data and altitude profiles of the...conference paper 2008
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Maessen, D.C. (author), Gunter, B.C. (author), Verhoeven, C.J.M. (author), Gill, E.K.A. (author)In 2007, the Tsinghua University, China, and the Delft University of Technology, The Netherlands, have agreed to jointly define, develop and operate the Formation for Atmospheric Science and Technology demonstration (FAST) mission. FAST will allow for a synoptic evaluation of global aerosol data and altitude profiles of the cryosphere with two...conference paper 2008