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Author: Kenneth W. Woodis
Publisher:
ISBN:
Category : Leak detectors
Languages : en
Pages : 36
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Book Description
Author: Kenneth W. Woodis
Publisher:
ISBN:
Category : Leak detectors
Languages : en
Pages : 36
Get Book Here
Book Description
Author: K. W. Woodis
Publisher:
ISBN:
Category :
Languages : en
Pages : 26
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Book Description
Author: Earle W. Young
Publisher:
ISBN:
Category : Leak detectors
Languages : en
Pages : 36
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 100
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Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 702
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 36
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Book Description
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309219744
Category : Science
Languages : en
Pages : 178
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Book Description
Derelict satellites, equipment and other debris orbiting Earth (aka space junk) have been accumulating for many decades and could damage or even possibly destroy satellites and human spacecraft if they collide. During the past 50 years, various National Aeronautics and Space Administration (NASA) communities have contributed significantly to maturing meteoroid and orbital debris (MMOD) programs to their current state. Satellites have been redesigned to protect critical components from MMOD damage by moving critical components from exterior surfaces to deep inside a satellite's structure. Orbits are monitored and altered to minimize the risk of collision with tracked orbital debris. MMOD shielding added to the International Space Station (ISS) protects critical components and astronauts from potentially catastrophic damage that might result from smaller, untracked debris and meteoroid impacts. Limiting Future Collision Risk to Spacecraft: An Assessment of NASA's Meteoroid and Orbital Debris Program examines NASA's efforts to understand the meteoroid and orbital debris environment, identifies what NASA is and is not doing to mitigate the risks posed by this threat, and makes recommendations as to how they can improve their programs. While the report identified many positive aspects of NASA's MMOD programs and efforts including responsible use of resources, it recommends that the agency develop a formal strategic plan that provides the basis for prioritizing the allocation of funds and effort over various MMOD program needs. Other necessary steps include improvements in long-term modeling, better measurements, more regular updates of the debris environmental models, and other actions to better characterize the long-term evolution of the debris environment.
Author: D. J. Withey
Publisher:
ISBN:
Category : Space cabin atmospheres
Languages : en
Pages : 184
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Book Description
A study was made to determine the optimum method for the detection, location and repair of leaks in a manned space vehicle cabin. The hazards existing in the aerospace environment that could cause leaks were defined. The requirements for the system were established and an optimum system evolved from a trade off of many proposed techniques. The optimum system utilizes cold cathode ionization gauges mounted on the outside (i.e., vacuum or space side) of the cabin wall to detect leakage through the wall by sensing a minute increase in pressure. Separate warning indicators are mounted in back of the detectors, on the inside of the wall. Thus, when a leak occurs, the crew immediately knows the general location of the leak. Wall coverage area for each detector warning unit and system weight, as well as the minimum detectable leak can be varied to suit an individual vehicle. Location of small leaks and faulty seals is accomplished with He as a tracer gas. When a small jet of He is directed over the leak, the current in the detector drops. Larger leaks are pinpointed visually, and/or by the audible noise generated. A decompression warning system is provided to signal the presence of the very large punctures. Repair of seals is best accomplished by application to the junction of the component and cabin wall of a liquid sealant. Repair of small punctures is best obtained with a putty adhesive sealant. A self-brazing plug is optimum for the repair of larger punctures. For repair of large punctures in tight corners, a metal patch mechanically secured optimum.
Author: V. Manno
Publisher: Springer Science & Business Media
ISBN: 9401028850
Category : Science
Languages : en
Pages : 347
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Book Description
Infrared Astronomy is a relatively new subject but it has already radically altered our ideas about astronomical sources. Recent progress in this subject is the result of improved detection techniques, particularly the use of detectors at liquid helium temperatures. Unfortunately, the terrestrial atmosphere greatly restricts Infrared astronomers by allowing them to detect radiation only in narrow transmission win dows and by presenting a foreground emission which limits the faintness of observable sources. It is only from aircraft or balloon altitudes that we can begin to observe faint sources over the complete range of wavelengths between the visible and the radio regions. Few such observations have yet been made and none from satellites, although the latter vehicle will offer complete freedom from atmospheric effects. New developments and intermediate steps will be required before the ultimate aim of flying in space can be achieved. It is not surprising therefore that the Fifth Eslab/Esrin Symposium should deal with this problem. This book contains the proceedings of the Symposium and faithfully records all discussions. The Symposium covered the present situation and future perspectives of IR techniques. International leaders in the field reviewed the results to date and the possible developments in telescope systems, detectors, cryogenics, filters, and interferometers. Individual con tributions were made by European and U. S. scientists in each of these fields.
Author: United States. Redstone Scientific Information Center, Redstone Arsenal, Huntsville, Ala
Publisher:
ISBN:
Category : Space vehicles
Languages : en
Pages : 120
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Book Description
