Institution
European Space Operations Centre
Government•Darmstadt, Germany•
About: European Space Operations Centre is a government organization based out in Darmstadt, Germany. It is known for research contribution in the topics: Orbit determination & Satellite. The organization has 309 authors who have published 331 publications receiving 10399 citations. The organization is also known as: ESOC.
Papers published on a yearly basis
Papers
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TL;DR: In this article, an analytical meteoroid flux model is presented which extends from 1 to 10 AU and covers a mass range from 10−18 to 1 g. The basic flux curve of the model by Grun et al. (1985, Icarus 62, 244-272.) is modified by an analytical multiplication factor in order to approximate the Meteoroid flux as predicted by the five-populations-model from Divine (1993, J. Geophys. Res. 98(E9), 17,029-17,048).
14 citations
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TL;DR: In this paper, a structural panel under acoustic loading by supersonic convected turbulence, deriving responses with finite Fourier transforms, was constructed by using a finite-finite Fourier transform.
14 citations
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TL;DR: Fundamental biases in V-slit sun and pencil-beam infrared Earth sensor measurements are identified and modeled in terms of representative covariances, useful in identifying the best attitude determination intervals and for providing quantitative estimates of the expected error for selected launch configurations.
Abstract: Fundamental biases in V-slit sun and pencil-beam infrared Earth sensor measurements are identified and modeled in terms of representative covariances. Their effects on attitude determination accuracy are assessed by means of covariance transformations following the calculations involved in a realistic attitude estimation process. The results are useful in identifying the best attitude determination intervals and for providing quantitative estimates of the expected error for selected launch configurations. On this basis the most favorable sensor settings can be selected for a given launch window. This is of particular interest for present-day communication satellites equipped with variable sensor mountings which can be adjusted before launch.
14 citations
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Goddard Space Flight Center1, Marshall Space Flight Center2, University of Michigan3, Johns Hopkins University4, The Catholic University of America5, European Space Agency6, Leibniz University of Hanover7, Paris Diderot University8, Imperial College London9, University of Rome Tor Vergata10, University of Trento11, Airbus Defence and Space12, University of Birmingham13, Istituto Nazionale di Fisica Nucleare14, ETH Zurich15, UK Astronomy Technology Centre16, Institut de Ciències de l'Espai17, INAF18, University of Urbino19, European Space Operations Centre20, University of Zurich21, University of Glasgow22, Polytechnic University of Catalonia23, University of Florence24, California Institute of Technology25
TL;DR: In this article, a new set of data obtained from direct measurements of momentum transfer to a spacecraft from individual particle impacts is presented, which can be used to detect impacts and measure properties such as the transferred momentum, direction of travel, and location of impact on the spacecraft.
Abstract: The zodiacal dust complex, a population of dust and small particles that pervades the solar system, provides important insight into the formation and dynamics of planets, comets, asteroids, and other bodies. We present a new set of data obtained from direct measurements of momentum transfer to a spacecraft from individual particle impacts. This technique is made possible by the extreme precision of the instruments flown on the LISA Pathfinder spacecraft, a technology demonstrator for a future space-based gravitational wave observatory. Pathfinder employed a technique known as drag-free control that achieved rejection of external disturbances, including particle impacts, using a micropropulsion system. Using a simple model of the impacts and knowledge of the control system, we show that it is possible to detect impacts and measure properties such as the transferred momentum, direction of travel, and location of impact on the spacecraft. In this paper, we present the results of a systematic search for impacts during 4348 hr of Pathfinder data. We report a total of 54 candidates with transferred momenta ranging from 0.2 to 230 μNs. We furthermore make a comparison of these candidates with models of micrometeoroid populations in the inner solar system, including those resulting from Jupiter-family comets (JFCs), Oort Cloud comets, Halley-type comets, and asteroids. We find that our measured population is consistent with a population dominated by JFCs, with some evidence for a smaller contribution from Halley-type comets, in agreement with consensus models of the zodiacal dust complex in the momentum range sampled by LISA Pathfinder.
14 citations
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TL;DR: In this paper, a new efficient parameterization scheme for solar short-wave radiative heating, as a component of the net radiative effects in the atmosphere, is tested in a three-dimensional mesoscale model.
Abstract: A new efficient parameterization scheme for solar short-wave radiative heating, as a component of the net radiative effects in the atmosphere, is tested in a three-dimensional mesoscale model. This model is designed with moist convective processes in mind, so that the radiative parameterization (solar plus thermal infrared) are interactive with the cloud field. Previous work by the authors with only an infrared scheme has demonstrated that cloud-radiation interactions are characterized by strong cloud-top cooling, leading to upper cloud-layer destabilization. The effects of including solar heating are to modulate the strength of the strong infrared cooling, thereby leading to weaker interactions between clouds, radiation, and mesoscale fields. The present study shows that even on the mesoscale and for relatively short time-spans, radiative processes in the presence of clouds are not negligible. As a further step, a simple fractional cloud cover parameterization is introduced and the model response is compared with results omitting this parameterization.
13 citations
Authors
Showing all 312 results
Name | H-index | Papers | Citations |
---|---|---|---|
S. Foley | 56 | 96 | 10888 |
Anja Rudolph | 53 | 137 | 17307 |
José F. F. Mendes | 51 | 257 | 19604 |
Johannes Schmetz | 29 | 85 | 3741 |
Markus Landgraf | 28 | 86 | 2678 |
Heiner Klinkrad | 23 | 120 | 1777 |
Ian Harrison | 22 | 71 | 1664 |
Holger Krag | 19 | 107 | 1081 |
Marcus Kirsch | 16 | 43 | 715 |
R. Maarschalkerweerd | 14 | 41 | 1163 |
Nicola Policella | 14 | 64 | 865 |
Michiel Otten | 13 | 27 | 539 |
Jozef C. Van Der Ha | 12 | 46 | 368 |
R. Jehn | 12 | 37 | 387 |
Andrés Riaguas | 10 | 14 | 376 |