Models of Earth's Atmosphere (90 to 2500 Km) PDF Download
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Author: George Y. Lou
Publisher:
ISBN:
Category : Atmospheric density
Languages : en
Pages : 68
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Book Description
Author: George Y. Lou
Publisher:
ISBN:
Category : Atmospheric density
Languages : en
Pages : 68
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Book Description
Author: United States. National Aeronautics and Space Administration. Space Vehicle Design Criteria (Environment)
Publisher:
ISBN:
Category : Space simulators
Languages : en
Pages : 59
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Book Description
Author: George Y. Lou
Publisher:
ISBN:
Category : Atmospheric density
Languages : en
Pages : 72
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 59
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Book Description
Author:
Publisher:
ISBN:
Category : Atmosphere, Upper
Languages : en
Pages : 37
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Book Description
Author: Dale L. Johnson
Publisher:
ISBN:
Category : Solar activity
Languages : en
Pages : 46
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Book Description
Author:
Publisher:
ISBN:
Category : Space debris
Languages : en
Pages : 460
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Book Description
Author: Yaguang Yang
Publisher: CRC Press
ISBN: 0429822138
Category : Science
Languages : en
Pages : 159
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Book Description
This book discusses all spacecraft attitude control-related topics: spacecraft (including attitude measurements, actuator, and disturbance torques), modeling, spacecraft attitude determination and estimation, and spacecraft attitude controls. Unlike other books addressing these topics, this book focuses on quaternion-based methods because of its many merits. The book lays a brief, but necessary background on rotation sequence representations and frequently used reference frames that form the foundation of spacecraft attitude description. It then discusses the fundamentals of attitude determination using vector measurements, various efficient (including very recently developed) attitude determination algorithms, and the instruments and methods of popular vector measurements. With available attitude measurements, attitude control designs for inertial point and nadir pointing are presented in terms of required torques which are independent of actuators in use. Given the required control torques, some actuators are not able to generate the accurate control torques, therefore, spacecraft attitude control design methods with achievable torques for these actuators (for example, magnetic torque bars and control moment gyros) are provided. Some rigorous controllability results are provided. The book also includes attitude control in some special maneuvers, such as orbital-raising, docking and rendezvous, that are normally not discussed in similar books. Almost all design methods are based on state-spaced modern control approaches, such as linear quadratic optimal control, robust pole assignment control, model predictive control, and gain scheduling control. Applications of these methods to spacecraft attitude control problems are provided. Appendices are provided for readers who are not familiar with these topics.
Author: J.R. Wertz
Publisher: Springer Science & Business Media
ISBN: 9400999070
Category : Technology & Engineering
Languages : en
Pages : 877
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Book Description
Roger D. Werking Head, Attitude Determination and Control Section National Aeronautics and Space Administration/ Goddard Space Flight Center Extensiye work has been done for many years in the areas of attitude determination, attitude prediction, and attitude control. During this time, it has been difficult to obtain reference material that provided a comprehensive overview of attitude support activities. This lack of reference material has made it difficult for those not intimately involved in attitude functions to become acquainted with the ideas and activities which are essential to understanding the various aspects of spacecraft attitude support. As a result, I felt the need for a document which could be used by a variety of persons to obtain an understanding of the work which has been done in support of spacecraft attitude objectives. It is believed that this book, prepared by the Computer Sciences Corporation under the able direction of Dr. James Wertz, provides this type of reference. This book can serve as a reference for individuals involved in mission planning, attitude determination, and attitude dynamics; an introductory textbook for stu dents and professionals starting in this field; an information source for experimen ters or others involved in spacecraft-related work who need information on spacecraft orientation and how it is determined, but who have neither the time nor the resources to pursue the varied literature on this subject; and a tool for encouraging those who could expand this discipline to do so, because much remains to be done to satisfy future needs.
Author: Allen E. Cole
Publisher:
ISBN:
Category : Atmospheric density
Languages : en
Pages : 36
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Book Description
Mean monthly atmospheric models are presented which depict the periodic variations in the vertical distributions of temperature, pressure, and density, surface to 90 km, at the equator and 15 deg N. The models are internally consistent and in agreement with available radiosonde and rocket observations of the thermodynamic properties of the tropical atmosphere. In the tropics the combined amplitudes of the annual and semiannual oscillations of density at altitudes between 25 and 80 km are approximately the same magnitude as the diurnal variations. Observed data show that the phase (time of maximum) of the annual temperature and density oscillations between 25 and 90 km is nearly identical at 8 deg S, 9 deg N, and 17 deg N, indicating that the meteorological equator for thermodynamic properties of the atmosphere is 8 to 10 deg south of the geographical equator. (Author).
