Download or read book Observed Torque producing Forces Acting on Satellites written by Robert J. Naumann and published by . This book was released on 1963 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: In addition to the forces that influence the motion of the center of mass of a satellite, various forces are also present which influence the motion about the center of mass. These torque-producing forces may result in a change in satellite orientation that affects the thermal balance, operation of solar cells, various scientific measurements, and drag forces. This latter effect results in a coupling between the equations describing the orientation with those describing the orbital motion. Therefore, strictly speaking, the orientation problem is part of the orbital problem. To solve the orientation equations it is necessary to determine the nature of the torque-producing forces. This is done by observing the change in orientation of several Explorer satellites where the drag force is sufficiently small so the orbital dependence on orientation is negligible. It was found that the permanent magnetic moments in the satellites were the dominant effect responsible for the observed changes in orientation. Gravitational torques are also significant. The changes in orientation of the satellites considered were explained extremely well by these two effects, hence it is conculed that other effects are not significant for similar satellites. Various approximations used in this study greatly reduce the effor required to integrate the orientation equations and do not require the simultaneous solution of the orbital equations. The findings, however, are applicable to the simultaneous solution of both the orbital and orientation sets of equations.
Download or read book Observed Torque producing Forces Acting on Satellites written by Robert J. Naumann and published by . This book was released on 1963 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dynamics of Satellites Dynamique des Satellites written by Maurice Roy and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 347 pages. Available in PDF, EPUB and Kindle. Book excerpt: Depuis Ie lancement de SPOUTNIK I par l'Union Sovietique Ie 4 Octobre 1957, des experiences humaines de Mecanique celeste de cette sorte ont ete repetees it de nombreuses reprises en U.R.S.S. et aux U.S.A. En 1961, sur ma proposition, l'Union Internationale de Mecanique tMorique et appliquee retint l'idee de consacrer en 1962 un Symposium special it la confrontation des resultats des experiences sovietiques et americaines en vue d'en tirer Ie maximum d'enseignements sur la question fondamentale suivante concernant la {laquo} Dynamique des satellites artificiels) de la Terre: quelles sont la nature et les lois des forces reelles qui agissent sur ces mobiles au voisinage de notre planete, et qui determinent par consequent leur mouvement~ En d'autres termes, il s'agissait de faire Ie point de nos connaissances sur Ie probleme du mouvement des Astres, magistralement resolu par NEWTON il Y a plus de trois siecles pour des astres quasi-ponctuels et assez eloignes. Les moyens d'observation utilises pour connaitre avec la meilleure precision possible Ie mouvement des satellites artificiels lances depuis 1957, et Ie fait de. la proximite relative de ces satellites par rapport it la Terre sont par eux-memes d~ nature it reveler soit des alterations de la loi classique de 1'attraction newtonienne, dont la signification serait it rechercher, soit l'intervention de forces per turbatrices, dont l'origine et Vexpression seraient it preciser.
Download or read book Monthly Catalog of United States Government Publications Cumulative Index written by United States. Superintendent of Documents and published by . This book was released on 1980 with total page 1284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1961 with total page 1274 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monthly Catalog of United States Government Publications written by United States. Superintendent of Documents and published by . This book was released on 1961 with total page 1284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific Satellites written by William R. Corliss and published by . This book was released on 1967 with total page 836 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Technical Report written by and published by . This book was released on 1963 with total page 726 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Technical Translation written by United States. National Aeronautics and Space Administration and published by . This book was released on 1966 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Some Design Considerations for Spin stabilized Satellites with Rigid Expandable Structures written by and published by . This book was released on 1965 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Technical Memorandum written by and published by . This book was released on 1965 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1985 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Astronautics Information written by and published by . This book was released on 1966 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Astronautics Information Literature Search written by Jet Propulsion Laboratory (U.S.) and published by . This book was released on 1965 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Torques and Attitude Sensing in Earth Satellites written by S. Fred Singer and published by Elsevier. This book was released on 2012-12-02 with total page 277 pages. Available in PDF, EPUB and Kindle. Book excerpt: Applied Mathematics and Mechanics, Volume 7: Torques and Attitude Sensing in Earth Satellites focuses on the possible torques that can affect the angular momentum of an Earth satellite. This book provides an understanding of the environment in which a satellite operates. Organized into 16 chapters, this volume starts with an overview of the application of force-free motion to space programs. This text then discusses the torque effects of a gravitational field, particularly with its gradient. Other chapters consider a particular method of gravity-gradient stabilization that utilizes a passive device to damp librations and thereby attain a vertical orientation. This book discusses as well the effects of the geomagnetic field on the angular motion of a satellite. The reader is also introduced to the method of magnetic attitude control employed in the Tiros satellite. The final chapter deals with the problem of horizon sensing, which is important for satellites requiring Earth stabilization. Astrophysicists will find this book useful.
Download or read book NASA SP written by and published by . This book was released on 1967 with total page 1126 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Scientific and Technical Reports written by United States. National Aeronautics and Space Administration Scientific and Technical Information Division and published by . This book was released on 1965 with total page 1152 pages. Available in PDF, EPUB and Kindle. Book excerpt: