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Gravity Gradient Stabilization Results From The Dodge Satellite In 1967
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Book Synopsis Gravity-gradient Stabilization Results from the Dodge Satellite in 1967 by : Frederick F. Mobley
Download or read book Gravity-gradient Stabilization Results from the Dodge Satellite in 1967 written by Frederick F. Mobley and published by . This book was released on 1968 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: The DODGE Satellite was launched into a 7 degrees, near-synchronous orbit on July 1, 1967. Residual spin was removed in 12 days by artificial magnetic hysteresis damping. The four booms of the 'X' configuration were deployed to achieve gravity capture. A sample-and-hold technique was used to damp librations by reacting with the earth's magnetic field. Pitch and roll damped to 20 degree peaks in 9 days. Efforts to obtain better stabilization with the torsion-wire damper-boom system were unsuccessful. Subsequent stabilization with magnetic damping showed one period of exceptionally good results with pitch and roll peaks of only 4 degrees. The satellite tumbled on November 16-17, possibly due to a meteoroid of the Leonid shower. TV cameras of 22 degree and 60 degree fields have provided attitude data. A color filter system in the 22 degree camera has allowed the first color pictures of the full earth image. (Author).
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1971 with total page 780 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis On the Libration of a Gravity Gradient Stabilized Spacecraft in an Eccentric Orbit by : Albert J. Fleig (Jr.)
Download or read book On the Libration of a Gravity Gradient Stabilized Spacecraft in an Eccentric Orbit written by Albert J. Fleig (Jr.) and published by . This book was released on 1970 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: General analytical methods for predicting planar and three dimensional attitude motion of a gravity gradient spacecraft in an elliptical orbit are developed. Regions of stability from the linearized planar equation of Mathieu form are plotted versus inertia parameters and orbit eccentricity. Similar plots showing the effects of damping are presented. The planar equation for larger eccentricities is examined with asymptotic expansion methods (KBM) for increased accuracy. An analysis based on the Hamiltonian and using canonical transformations and the method of averaging is applied to the three degree of freedom equations. Thirty-two combinations of resonant eigenfrequencies, indicating both nonlinear and parametric resonances, and including six previously shown by Breakwell and Pringle, are found. Nineteen of these combinations lead to unbounded increases in the amplitude of oscillation of one or more of the spacecraft modes. Eight lead to significant interchanges of energy between modes. The remaining five have little effect.
Author :United States. Congress. House. Committee on Science and Astronautics Publisher : ISBN 13 : Total Pages :900 pages Book Rating :4.:/5 (6 download)
Book Synopsis 1967 NASA Authorization by : United States. Congress. House. Committee on Science and Astronautics
Download or read book 1967 NASA Authorization written by United States. Congress. House. Committee on Science and Astronautics and published by . This book was released on 1966 with total page 900 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Comparison of Theoretical and Experimental Attitude Data for the Dodge Spacecraft by : J. Miller Whisnant
Download or read book Comparison of Theoretical and Experimental Attitude Data for the Dodge Spacecraft written by J. Miller Whisnant and published by . This book was released on 1969 with total page 79 pages. Available in PDF, EPUB and Kindle. Book excerpt: The DODGE satellite, launched in July 1967, has successfully achieved gravity-gradient stabilization at near synchronous altitudes. Extendible booms, a constant-speed rotor, and four damping systems provide the opportunity to perform many attitude stabilization experiments. One of the objectives of the DODGE experiment was to determine the adequacy of theoretical analyses by correlation between simulation results and experimental data. This paper presents a comparison between the measured attitude and the results of digital simulation of the equations of attitude motion. Agreement between the two is varied. The digital simulation is also used to investigate possible causes of anomalous attitude behavior. It is shown that boom non-straightness has a significant effect on attitude performance, but that erroneous magnetometer readings of the type that were recorded in orbit do not. (Author).
Book Synopsis Aeronautics and Space Report of the President ... Activities by : United States. President
Download or read book Aeronautics and Space Report of the President ... Activities written by United States. President and published by . This book was released on 1963 with total page 1372 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis United States Aeronautics and Space Activities by : United States. President
Download or read book United States Aeronautics and Space Activities written by United States. President and published by . This book was released on with total page 662 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Aeronautics and Space Report of the President by : United States. President
Download or read book Aeronautics and Space Report of the President written by United States. President and published by . This book was released on 1965 with total page 914 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis U.S. Aeronautics and Space Activities by : United States. President
Download or read book U.S. Aeronautics and Space Activities written by United States. President and published by . This book was released on 1968 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Reports and Documents by : United States. Congress
Download or read book Reports and Documents written by United States. Congress and published by . This book was released on 1969 with total page 924 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Annual Index by :
Download or read book Government Reports Annual Index written by and published by . This book was released on 1969 with total page 1008 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Use of Satellite Communications by : United States. Congress. House. Government Operations
Download or read book Government Use of Satellite Communications written by United States. Congress. House. Government Operations and published by . This book was released on 1966 with total page 872 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :United States. Congress. House. Committee on Government Operations. Military Operations Subcommittee Publisher : ISBN 13 : Total Pages :878 pages Book Rating :4.0/5 (5 download)
Book Synopsis Government Use of Satellite Communications by : United States. Congress. House. Committee on Government Operations. Military Operations Subcommittee
Download or read book Government Use of Satellite Communications written by United States. Congress. House. Committee on Government Operations. Military Operations Subcommittee and published by . This book was released on 1966 with total page 878 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reviews progress in the military satellite program (IDCSP), as well as DOD procurement of communication satellite services.
Book Synopsis Government Reports Announcements by :
Download or read book Government Reports Announcements written by and published by . This book was released on 1971 with total page 980 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Hearings by : United States. Congress. House
Download or read book Hearings written by United States. Congress. House and published by . This book was released on 1966 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Bibliography of Scientific and Industrial Reports by :
Download or read book Bibliography of Scientific and Industrial Reports written by and published by . This book was released on 1971 with total page 1374 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Passive Gravity-gradient Libration Dampers: Space Vehicle Design Criteria (guidance and Control) by :
Download or read book Passive Gravity-gradient Libration Dampers: Space Vehicle Design Criteria (guidance and Control) written by and published by . This book was released on 1971 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
