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Speretta, S. (author), Sundaramoorthy, P.P. (author), Gill, E.K.A. (author)
This paper aims at analysing the current capabilities of the NORAD Space Surveillance network, in particular focusing on very small objects in LEO. Spacecraft miniaturization has been pushing the limits and capabilities of small satellites so much that spacecraft as small as 5x5x5 cm have already been launched and even smaller ones are currently...
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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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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Heusdens, R. (author), Engelen, S. (author), Buist, P.J. (author), Noroozi, A. (author), Sundaramoorthy, P.P. (author), Verhoeven, C.J.M. (author), Bentum, M. (author), Gill, E.K.A. (author)
Pulsars with their periodic pulses and known positions are ideal beacons for navigation. The challenge, however, is the detection of the very weak pulsar signals that are submerged in noise. Radio based approaches allow the use of advanced techniques and methods for the detection and acquisition of such weak signals. In this paper, an effective...
conference paper 2012
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Engelen, S. (author), Gill, E.K.A. (author), Verhoeven, C.J.M. (author)
Satellite swarms, consisting of a large number of identical, miniaturized and simple satellites, are claimed to provide an implementation for specific space missions which require high reliability. However, a consistent model of how reliability and availability on mission level is linked to cost- and time-effective design of the individual swarm...
conference paper 2012
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Van Reijen, B. (author), Koch, N. (author), Lazurenko, A. (author), Weis, S. (author), Schirra, M. (author), Genovese, A. (author), Haderspeck, J. (author), Gill, E.K.A. (author)
The Thales diagnostic equipment for ion beam characterization consists of a gridded and single orifice retarding potential analyzer (RPA) and an energy selective mass spectrometer (ESMS). During the development phase of these sensors considerable effort was put into the removal of ion optical effects as well as to ensure equal ion transmission...
conference paper 2011
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Sun, R. (author), Guo, J. (author), Gill, E.K.A. (author), Maessen, D. (author)
Precise formation flying (PFF) missions require formation acquisition and maintenance through interactions among spacecraft by inter-satellite communication and relative navigation. That requires the network architecture to satisfy dedicated system constraints of time-criticality for updating navigation measurements and flexibility for...
conference paper 2011
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Gill, E.K.A. (author), Sundaramoorthy, P. (author), Bouwmeester, J. (author), Zandbergen, B. (author), Reinhard, R. (author)
QB50 is a mission establishing an international network of 50 nano-satellites for multi-point, in-situ measurements in the lower thermosphere and re-entry research. As part of the QB50 mission, the Delft University of Technology intends to contribute two nano-satellites both being equipped with a highly miniaturized propulsion system in addition...
conference paper 2010
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Maessen, D.C. (author), Gill, E.K.A. (author)
This paper presents an investigation into the relative state estimation and observability for two formation flying satellites using two different relative navigation sensor sets. The first set consists out of a transmitter antenna on one satellite and a single receiver antenna on the other satellite to measure the inter-satellite range using a...
conference paper 2010
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Guo, J. (author), Yao, W. (author), Gill, E. (author)
The design of Distributed Space Systems (DSSs) is a challenging task, especially in the conceptual design stage where unknown or uncertain information extensively exist. This paper investigates the problem of designing DSSs in the presence of uncertainties. The uncertainties associated with DSSs are discussed. It is shown that DSSs are...
conference paper 2010
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Gill, E.K.A. (author), Helderweirt, A. (author)
This paper presents a preliminary analysis of a novel Search and Rescue (SAR) based emergency system for Low Earth Orbit (LEO) satellites using the Galileo Global Navigation Satellite System (GNSS). It starts with a description of the space user SAR system including a concept description, mission architecture and legal and regulatory aspects....
conference paper 2010
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Kestilä, A.A. (author), Engelen, S. (author), Gill, E.K.A. (author), Verhoeven, C.J.M. (author), Bentum, M.J. (author), Irahhauten, Z. (author)
Interstellar navigation poses significant challenges in all aspects of a spacecraft. One of them is reliable, low-cost, real-time navigation, especially when there is a considerable distance between Earth and the spacecraft in question. In this paper, a complete system for navigation using pulsar radio emissions is described and analysed. The...
conference paper 2010
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Sundaramoorthy, P.P. (author), Gill, E. (author), Verhoeven, C.J.M. (author)
Embracing reduced requirements and leveraging commercial technology has led to a fast growing small satellite industry. Although most interest in small satellites has hovered around the micro satellites through to the picosatellites, academic interest now extends up to the sub 100 g range of satellites as well. Femto-satellites with a mass range...
conference paper 2010
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Gill, E.K.A. (author), Helderweirt, A. (author)
Low Earth Orbit (LEO) satellites have a limited direct contact time with the stations of their ground segment. This fundamentally constraints a timeliness reaction of the mission control center in case of emergency situations onboard the LEO spacecraft. To enable such a rapid reaction to emergency situations onboard LEO satellites, it is...
conference paper 2010
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Batenburg, P.A.W. (author), Gill, E.K.A. (author), Drijkoningen, G.G. (author), Toxopeus, G.J. (author)
A study was performed to determine the feasibility of reflection seismology for planetary geology taking into account present-day technology advances. An approach based on end-user requirements was applied to assure the scientific usefulness of the results. Thirty applications of a seismic-reflection system for space applications were determined...
conference paper 2010
document
Sun, R. (author), Guo, J. (author), Gill, E.K.A. (author)
Challenges and opportunities of wireless sensor networks (WSNs) in space applications are presented. The investigation of internet protocols, ad hoc routing and commercial-off-the-shelf (COTS) wireless communication protocols for efficient and reliable network design is addressed. In order to facilitate the analysis, several application...
conference paper 2010
document
Guo, J. (author), Yao, W. (author), Gill, E.K.A. (author)
The problem of new attributes and the induced uncertainties has been extensively discussed in this paper. The methodology of uncertainty multidisciplinary design optimization has also been extended to spacecraft conceptual design in the presence of new attributes. The application of this methodology on fractionated spacecraft indicates that the...
conference paper 2010
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Bouwmeester, J. (author), Brouwer, G.F. (author), Gill, E.K.A. (author), Monna, G.L.E. (author), Rotteveel, J. (author)
Delfi-Next is the second project within the Delfi nanosatellite development program of Delft University of Technology. It will provide students hands-on experience, facilitate technology demonstration for innovative miniaturized space technology from the Dutch space sector and allow advancements in satellite bus performance compared to its...
conference paper 2010
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Osuman, A. (author), Guo, J. (author), Gill, E.K.A. (author)
Several industries are involved in the development of distributed systems, testbeds are needed to simulate the real world challenges that face the distributed systems. Presently, there are a number of testbeds in the world with very distinctive characteristics. Delft University of Technology is involved in the development of distributed space...
conference paper 2010
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