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This book is the product of five and a half years of research dedicated to the und- standing of radar interferometry, a relatively new space-geodetic technique for m- suring the earth’s topography and its deformation. The main reason for undertaking this work, early 1995, was the fact that this technique proved to be extremely useful for wide-scale, fine-resolution deformation measurements. Especially the interf- ometric products from the ERS-1 satellite provided beautiful first results—several interferometric images appeared as highlights on the cover of journals such as Nature and Science. Accuracies of a few millimeters in the radar line of sight were claimed in semi-continuous image ...
The book is based on an international workshop on High Precision Navigation. The reader will find a wealth of information on - satellite navigation systems and their geodetic applications, especially using GPS - laser and radar techniques - image processing and image sequence analysis - autonomous vehicle guidance systems - inertial navigation systems - integration of different sensor systems.
This volume is the result of the dedicated effort undertaken by an international group of scientists and administrators, who have contemplated the challenge of the future of space-based earth science for the next decade. Recognizing the need for defining new milestones both in science and technology, they have developed a detailed report of what could be achieved and what challenges remain after twenty fertile years of space exploration. The reader will find a wealth of information about the role of space geodesy in the Earth Sciences of the 1990's.
This paper is a contribution to the topological study of vector fields on manifolds. In particular we shall be concerned with the problems of exist ence of r linearly independent vector fields. For r = 1 the classical result of H. Hopf asserts that the vanishing of the Euler characteristic is the necessary and sufficient condition, and our results will give partial extens ions of Hopf's theorem to the case r > 1. Arecent article by E. Thomas [10] gives a good survey of work in this general area. Our approach to these problems is based on the index theory of elliptic differential operators and is therefore rather different from the standard topological approach. Briefly speaking, what we do i...
Das Open-Access-Buch untersucht, wie die organisationale Gestaltung von Forschungseinrichtungen ihre inhaltliche und methodische Ausrichtung beeinflusst und wie sich Disziplinen und Forschungsfelder im Laufe der Zeit gewandelt und an neue institutionelle Kontexte angepasst haben. Die präsentierten historischen Fallgeschichten werden mithilfe eines gemeinsamen Analyserasters in Beziehung zueinander gesetzt. Auf diese Weise sind über die Einzelfälle hinaus allgemeine Einsichten möglich. Hierzu gehört, dass sich neue Forschungsgebiete häufig besser in Forschungseinrichtungen außerhalb der Hochschulen etablieren lassen. Auch können Forschungsgebiete dann erfolgreich etabliert werden, wenn Institute und Zentren ein Mindestmaß an organisatorischer und finanzieller Selbstständigkeit erhalten. Der Band vermittelt Erkenntnisse zu neuartigen Organisationsformen und zur Transformation von bestehenden Forschungseinrichtungen in den Natur-, Sozial- und Technikwissenschaften.