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On the maximum - entropy-autoregressive modeling of time series / B. Fong Chao (1984)
Titre : On the maximum - entropy-autoregressive modeling of time series Type de document : Monographie Auteurs : B. Fong Chao, Auteur Editeur : Washington : National Aeronautics and Space Administration NASA Année de publication : 1984 Collection : NASA Technical Memorandum Importance : 119 p. Format : 21 x 30 cm Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie physique Résumé : (Auteur) The autoregressive (AR) model of a random process is interpreted in the light of the Prony's relation which relates a complex conjugate pair of poles of the AR process in the z-plane (or the z domain) on the one hand, to the complex frequency of one complex harmonic function in the time domain on the other. Thus the AR model of a time series is one that models the time series as a linear combination of complex harmonic functions, which include pure sinusoids and real exponentials as special cases. An AR model is completely determined by its z-domain pole configuration. The maximum-entropy/autoregressive (ME/AR) spectrum, defined on the unit circle of the z-plane (or the frequency domain), is nothing but a convenient, but ambiguous visual representation. It is asserted that the position and shape of a spectral peak is determined by the corresponding complex frequency, and the height of the spectral peak contains little information about the complex amplitude of the complex harmonic functions. Numéro de notice : 18678 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Monographie Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=55444 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18678-01 21.00 Livre Centre de documentation Technologies spatiales Disponible Spaceborne gravity gradiometers / W.C. Wells (1984)
Titre : Spaceborne gravity gradiometers : Proceedings of a workshop held at NASA Goddard space flight center Type de document : Actes de congrès Auteurs : W.C. Wells, Éditeur scientifique Congrès : NASA 1983, workshop Spaceborne gravity gradiometers (28 février - 2 mars 1983; NASA Goddard space flight center, Greenbelt, Maryland - Etats-Unis), Auteur Editeur : Washington : National Aeronautics and Space Administration NASA Année de publication : 1984 Collection : NASA conference publication num. 2305 Importance : 76 p. Format : 21 x 30 cm Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie physique
[Termes IGN] champ de pesanteur terrestre
[Termes IGN] gradiomètre
[Termes IGN] gradiométrieIndex. décimale : CG1984 Actes de congrès en 1984 Résumé : (Auteur) The Spaceborne Gravity Gradiometer Workshop was held at the NASA Goddard Space Flight Center in Greenbelt, Maryland on February 28 through March 2, 1983. The Workshop was sponsored by the NASA Office of Space Science and Applications and was intended to provide information for the planning of the NASA Geodynamics Program, specifically with reference to a gravity gradiometer mission in the mid 1990s. The presentations and discussions reviewed and assessed the current status of gravity gradiometers. The technical problems and potential solutions were identified. The results of the Workshop became the basis of a long"term plan for the development of orbital gravity gradiometers. Numéro de notice : 18689 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Actes Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=34869 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18689-01 CG.84 Livre Centre de documentation En réserve M-103 Disponible On excitation of Earth's free wobble and reference frames / B. Fong Chao (1983)
Titre : On excitation of Earth's free wobble and reference frames Type de document : Monographie Auteurs : B. Fong Chao, Auteur Editeur : Washington : National Aeronautics and Space Administration NASA Année de publication : 1983 Collection : NASA Technical Memorandum Importance : 119 p. Format : 21 x 30 cm Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie physique
[Termes IGN] mouvement du pôle
[Termes IGN] oscillation
[Termes IGN] repère de référenceRésumé : (Auteur) In this paper, we study the excitation of the Earth's polar motion in connection with problems that are associated with the diversity of reference frames involved in observations and theoretical computations. Thus, following the dynamics of the Earth's polar motion, the kinematics that relates observations from different reference frames is developed. The conventional procedures of studying the siesmic excitation of polar motion are then reexamined accordingly-subject constantly to the question: relative to what reference frame? It is concluded that an inconsistency in reference frames has prevailed in the literature. While this inconsitency is indeed far from trivial, the resultant discrepancy, however, is small for all practical purposes. Numéro de notice : 18677 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Monographie Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=55443 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18677-01 21.00 Livre Centre de documentation Technologies spatiales Disponible Spacelab, an international short-stay orbiting laboratory / W. Froehlich (1983)
Titre : Spacelab, an international short-stay orbiting laboratory Type de document : Monographie Auteurs : W. Froehlich, Auteur Editeur : Washington : National Aeronautics and Space Administration NASA Année de publication : 1983 Importance : 77 p. Format : 22 x 28 cm Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Missions spatiales
[Termes IGN] Agence spatiale européenne
[Termes IGN] biologie
[Termes IGN] mission spatiale
[Termes IGN] National aeronautics and space administration
[Termes IGN] navette spatiale
[Termes IGN] orbite
[Termes IGN] SpacelabRésumé : (Auteur) In the orderly ladderlIike progression of space exploration, the next logical rung is Spacelab. In the early 1970s when decisions for the post-Apollo future of the U.S. space program reached their crucial phase, an emerging need was apparent:
Once the reusable, heavy-lift American space transportation system called the Space Shuttle entered full service in the 1980s, it would drastically alter the ways American satellites are launched. Most one-time-use-only rockets would disappear. Taking their places, the Shuttle would carry the satellites into space and launch them into orbit. But the changes in scientific space research would be even more drastic. Research could be vastly increased because of the Shuttle's ability to cart), heavy loads into space. Moreover, the Shuttle would be able to bring heavy cargoes back to Earth. Heretofore this was impossible. What would be needed for taking Full advantage of these new opportunities was a versatile facility that would permit scientists themselves to engage in observations and conduct experiments of increasing scope and complexity aboard the Shuttle in space. That envisioned new facility, would permit them to do so easily, comfortably, and at low cost, because they could reuse their equipment again and again.
Scientific research in space, though spectacularly successful, had been extremely expensive, partly because of the need to build new research equipment for each flight. Also this was true because of the requirement to design experiments to meet stringent limitations of weight, size, electric power, and environmental conditions.
At the beginning of the 1970s Western European space officials were considering strategies to involve their continent in manned space flight without having to start an extremely expensive program of their own. They accepted an American invitation to participate in the NASA manned space program. They agreed to design, build, and finance the needed research facility for the Space Shuttle. The facility, later to be called Spacelab, would be financed and built jointly by 10 European nations through the European Space Agency (ESA) in close cooperation with the National Aeronautics and Space Administration (NASA). NASA would assist with design concepts and provide all needed ground facilities, Shuttle interfaces, and crew training. From the point Of View Of NASA, with its own resources strained by Shuttle development costs, the European partnership held the promise of a muchsought contribution to the American space transportation system.
After spending 10 years and
1 billion at their complex task, the 10 participating European nations completed Spacclab. The United States spent another halfbillion dollars to purchase a second Spacelab from Europe and for the promised Shuttle interfaces, ground and operational support, and personnel training.
By coincidence, Spacelab's first flight late ill 1983 comes only shortly after the 25th anniversary of NASA's founding oil October 1, 1958. Conceived and built during the first 25 years of NASA's existence for service during the second 25 years, Spacelab marks a dividing line between the first and second quarters of a century of the U.S. space exploration program.
Spacelab was planned and constructed to serve as a suitable host for significant scientific research and technological development. As intended by its European builders and by its American operators, this new facility will serve scientists from many nations and in many scientific disciplines and technological specialties.
Spacelab is the outgrowth of steady evolution of space technology. It enables scientists and engineers to go into space for inorbit research with their own hands and eyes - with instruments they have designed and built. This publication summarizes what Spacelab is, what it does, how it came to be, and what its users expect from it.Note de contenu : INTRODUCTION
CHAPTER ONE :
What is Spacelab ?
CHAPTER TWO :
A Sightseer's Tour of Spacelab
CHAPTER THREE :
Meet the Crew
CHAPTER FOUR :
Spacelab at Work : The Experiments
(Part 1)
CHAPTER FIVE :
Spacelab at Work : The Experiments
(Part 11)
CHAPTER SIX :
A Dav Aboard Spaceiab
CHAPTER SEVEN :
Spacelab - Its Birth, Its Impact, Its FutureNuméro de notice : 16427 Affiliation des auteurs : non IGN Thématique : IMAGERIE/POSITIONNEMENT Nature : Monographie Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=55157 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 16427-01 21.30 Livre Centre de documentation Technologies spatiales Disponible 16427-02 21.30 Livre Centre de documentation Technologies spatiales Disponible Crustal dynamics data information system user's guide / H Linder (1982)
Titre : Crustal dynamics data information system user's guide Type de document : Monographie Auteurs : H Linder, Auteur ; Carey E. Noll, Auteur Editeur : Washington : National Aeronautics and Space Administration NASA Année de publication : 1982 Importance : 94 p. Format : 21 x 30 cm Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale
[Termes IGN] déformation verticale de la croute terrestre
[Termes IGN] géodynamique
[Termes IGN] positionnement par ITGBIndex. décimale : 30.82 Applications géophysiques de géodésie spatiale Résumé : (Auteur) This document describes the contents of the Crustal Dynamics Project Data Information System (DIS) and instructions on the use of this system for accessing the geodetic data products stored in the data bank of the project. The use of the menu-driven system is described, and many examples of different types of data queries are presented for the potential users of the system. Numéro de notice : 18699 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Monographie Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=55457 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18699-01 30.82 Livre Centre de documentation Géodésie Disponible 18699-02 30.82 Livre Centre de documentation Géodésie Disponible Data management plan for crustal dynamics project / H Linder (1981)PermalinkSkylab EREP investigations summary / National Aeronautics and Space Administration NASA (1978)PermalinkSkylab explores the Earth / National Aeronautics and Space Administration NASA (1977)PermalinkSkylab Earth resources data catalog / National Aeronautics and Space Administration NASA (1974)PermalinkSkylab experiments, 2. Volume 2 remote sensing of Earth resources: information for teachers, including suggestions on relevance to school curricula / National Aeronautics and Space Administration NASA (1973)PermalinkApollo 15 / National Aeronautics and Space Administration NASA (1972)PermalinkRemote sensing of the Chesapeake bay, Conference on remote sensing / National Aeronautics and Space Administration NASA (1972)PermalinkWeather satellite picture receiving stations / C.H. Vermillon (1969)PermalinkPermalink