120
120
Sep 21, 2009
09/09
by
*Credit:* Hubble Images: S. Lee (University of Colorado) and NASA [ http://www.nasa.gov/ ]. Viking Digital imageMap: USGS
movies
eye 120
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*Description*:> Pathfinder is landing on the Ares Valles, shown at the center of a Hubble Space Telescope full-color disk of Mars. The next map is a closeup of the Hubble image, and finally the Viking image shows the terrain near the Mars Pathfinder landing site, marked by an oval. Technical facts about this news release: Back to entire collection [ http://hubblesite.org/newscenter/archive/releases/index/435/ ] Next release [ http://hubblesite.org/newscenter/archive/releases/1997/11/ ]...
Topics: What -- Ares Launch Vehicles, What -- Hubble Space Telescope (HST), What -- Mars, What -- Viking
Source: http://hubblesite.org/newscenter/archive/releases/1997/15/video/b/
37
37
Sep 22, 2009
09/09
by
*Credit:* NASA [ http://www.nasa.gov/ ], J. Frassanito & Associates, Inc., and the Future In-Space Operations Working Group, and STScI [ http://www.stsci.edu/ ]
image
eye 37
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*Description*: This is an artist's illustration of one of the possible designs for the Advanced Technology Large-Aperture Space Telescope (ATLAS Telescope), which will have more than 40 times the sensitivity of the Hubble Space Telescope. The telescope would have a primary mirror that could be as large as 16 meters in diameter, and could be carried aboard NASA's planned Ares V heavy-lift launch vehicle. The telescope would be located 1 million miles away at a gravitational balancing point in...
Topics: What -- Atlas, What -- Hubble Space Telescope (HST), What -- Ares Launch Vehicles
Source: http://hubblesite.org/newscenter/archive/releases/2008/12/image/a/
56
56
Sep 21, 2009
09/09
by
*Credit:* Phil James (Univ. Toledo [ http://www.utoledo.edu/ ]), Steve Lee (Univ. Colorado [ http://www.colorado.edu/ ]), and NASA [ http://www.nasa.gov ]
image
eye 56
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*Description*: [RIGHT] This NASA Hubble Space Telescope picture of Mars was taken on Sept. 12, one day after the arrival of the Mars Global Surveyor (MGS) spacecraft and only five hours before the beginning of autumn in the Martian northern hemisphere. (Mars is tilted on its axis like Earth, so it has similar seasonal changes, including an autumnal equinox when the Sun crosses Mars' equator from the northern to the southern hemisphere). This Hubble picture was taken in support of the MGS...
Topics: Mars, What -- Hubble Space Telescope (HST), What -- Mars Global Surveyor Orbiter (MGS), What --...
Source: http://hubblesite.org/newscenter/archive/releases/1997/31/image/a/
46
46
Sep 21, 2009
09/09
by
*Credit:* Phil James (Univ. Toledo), Steve Lee (Univ. Colorado) and Mike Wolff (Univ. Toledo) and NASA [ http://www.nasa.gov/ ]
image
eye 46
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*Description*: Hubble Space Telescope images of Mars, taken on June 27, 1997, reveal a significant dust storm which fills much of the Valles Marineris canyon system and extends into Xanthe Terra, about 600 miles (1000 kilometers) south of the landing site. It is difficult to predict the evolution of this storm and whether it will affect the Pathfinder observations. The pictures were taken in order to monitor the site in Ares Vallis where the Pathfinder spacecraft will land on July 4. The two...
Topics: Mars, What -- Hubble Space Telescope (HST), What -- Mars, What -- Terra, What -- Ares Launch...
Source: http://hubblesite.org/newscenter/archive/releases/1997/23/image/a/
40
40
Sep 21, 2009
09/09
by
*Credit:* Steve Lee (Univ. Colorado), Phil James (Univ. Toledo), and Mike Wolff (Univ. Toledo) and NASA [ http://www.nasa.gov/ ]
image
eye 40
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*Description*: NASA Hubble Space Telescope images of Mars, taken on June 27, 1997 (left) and July 11, 1997 (right), document the dissipation of a large dust storm during the 12 days separating the two observations. The images were taken to monitor the weather conditions near Ares Vallis, the site where NASA's Pathfinder spacecraft landed on July 4. Maps of the equatorial region were constructed from the images and are shown at the bottom of the figure; a green cross marks the Pathfinder landing...
Topics: Mars, What -- Hubble Space Telescope (HST), What -- Mars, What -- Ares Launch Vehicles, What --...
Source: http://hubblesite.org/newscenter/archive/releases/1997/24/image/a/
1,421
1.4K
Nov 13, 2012
11/12
by
A. A. Mikhailov
texts
eye 1,421
favorite 1
comment 0
Topics: manned spaceflight, spacestations, stellar formation, stellar astronomy, astrophysics, space...
389
389
Jul 7, 2010
07/10
by
Aase, D. T.; Kempf, F. J.; Keefe, D. P.; Townsend, W. C.; Trent, D. S
texts
eye 389
favorite 0
comment 0
No Abstract Available
Topics: INSTRUMENTS, SATURN 1B LAUNCH VEHICLES, SATURN 5 LAUNCH VEHICLES, EQUIPMENT SPECIFICATIONS, MANUAL,...
201
201
May 31, 2011
05/11
by
Acevedo, Sara E
texts
eye 201
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A bibliography (18 references) listing the publications during the current grant period of The Center for the Study of Life in the Universe, part of the SETI (Search for Extraterrestrial Intelligence) Institute is presented. The publications, from the Period of Performance September 1, 2000 to February 28, 2002, primarily cover Mars and its potential for life, as well as extreme environments and primitive life forms on Earth. One of the publications covers Europa and the Galileo spacecraft.
Topics: TIME DEPENDENCE, COMPUTERIZED SIMULATION, UNSTEADY FLOW, TURBINE PUMPS, INCOMPRESSIBLE FLOW, SPACE...
794
794
Jul 11, 2010
07/10
by
Acuna, M. H.; Scearce, C. S.; Seek, J.; Scheifele, J
texts
eye 794
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comment 0
A description of the precision triaxial fluxgate magnetometer to be flown aboard the MAGSAT spacecraft is presented. The instrument covers the range of or - 64,000 nT with a resolution of or - 0.5 nT, an intrinsic accuracy of or - 0.001% of full scale and an angular alignment stability of the order of 2 seconds of arc. It was developed at NASA's Goddard Space Flight Center and represents the state-of-the-art in precision vector magnetometers developed for spaceflight use.
Topics: LAUNCH VEHICLES, TECHNOLOGY ASSESSMENT, NASA PROGRAMS, ROCKET ENGINES, SATURN PROJECT,...
260
260
Jun 1, 2011
06/11
by
Ali, Syed Firasat; Khan, Javed Khan; Rossi, Marcia J.; Crane, Peter; Heath, Bruce E.; Knighten, Tremaine; Culpepper, Christ
texts
eye 260
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Personal computer based flight simulators are expanding opportunities for providing low-cost pilot training. One advantage of these devices is the opportunity to incorporate instructional features into training scenarios that might not be cost effective with earlier systems. Research was conducted to evaluate the utility of different instructional features using a coordinated level turn as an aircraft maneuvering task. In study I, a comparison was made between automated computer grades of...
Topics: HYPERSONIC VEHICLES, FLIGHT PATHS, SPACECRAFT LAUNCHING, LAUNCH VEHICLES, MISSION PLANNING, RANGE...
179
179
May 31, 2011
05/11
by
Allen, Glenn E
texts
eye 179
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The term of the second year of the award is the period from March 15, 2001 to March 14, 2002. As was the specified goal of the second year, we analyzed the spatial and spectral X-ray data for several young supernova remnants. I published a paper about an analysis of the ROSAT, ASCA, and RXTE data for the supernova remnant SN 1006. A copy of this paper is enclosed. As described in the paper, we believe that we accurately modeled the nonthermal X-ray emission from the remnant. The results of this...
Topics: PROPULSION, REUSABLE LAUNCH VEHICLES, PROTOTYPES, ROCKET ENGINES
282
282
Jun 9, 2011
06/11
by
Alter, Stephen J
texts
eye 282
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This paper presents grid generation techniques available in the Volume Grid Manipulation (VGM) code. The VGM code is designed to manipulate existing line, surface and volume grids to improve the quality of the data. It embodies an easy to read rich language of commands that enables such alterations as topology changes, grid adaption and smoothing. Additionally, the VGM code can be used to construct simplified straight lines, splines, and conic sections which are common curves used in the...
Topics: AIR BREATHING ENGINES, LIFTING BODIES, LAUNCH VEHICLE CONFIGURATIONS, PROPULSION SYSTEM...
769
769
Jul 12, 2010
07/10
by
Altman, J. M.; Bates, J.; Blitch, N. H.; Burns, H. P.; Tallman, S. L
texts
eye 769
favorite 1
comment 0
No Abstract Available
Topics: APOLLO PROJECT, SATURN 1B LAUNCH VEHICLES, SATURN 5 LAUNCH VEHICLES, EQUIPMENT SPECIFICATIONS,...
327
327
Jun 20, 2010
06/10
by
Amster, A. B.; Chamberlain, D. L.; MILL. T.; Schulenberg, F.; Stringham, R
texts
eye 327
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Impact sensitivity of launch vehicle organic materials with liquid oxygen - tribochemical and carbon radical reactions, and characterization of fluorosilicone grease samples
Topics: CARBON, ORGANIC MATERIALS, POLYSTYRENE, RADICALS, REACTIVITY, THERMOCHEMISTRY, FREE RADICAL, IMPACT...
468
468
Jun 21, 2010
06/10
by
Anagnostou, E.; Spakowski, A. E
texts
eye 468
favorite 0
comment 0
Space radiation effects on plastic films used as cover materials on solar cells
Topics: CERAMIC COATINGS, COMPOSITE MATERIALS, THERMAL INSULATION, ASBESTOS, GLASS FIBERS, MISSILES, SATURN...
414
414
Jun 20, 2010
06/10
by
Anoshchenko, N. D
texts
eye 414
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comment 0
History on development of United States launch vehicles, prehistory of Soviet gliding, and literature on history of aviation and cosmonautics in Ukraine
Topics: AERONAUTICS, ASTRONAUTICS, GLIDING, HISTORIES, LAUNCH VEHICLES, LITERATURE, U.S.S.R., UNITED STATES
160
160
Aug 1, 2010
08/10
by
Aprile, Elen
texts
eye 160
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comment 0
The objective was to develop the technology of liquid xenon (LXe) detectors for spectroscopy and imaging of gamma rays from astrophysical sources emitting in the low to medium energy regime. In particular, the technical challenges and the physical processes relevant to the realization of the LXe detector operated as a Time Projection Chamber (TPC) were addressed and studied. Experimental results were obtained on the following topics: (1) long distance drift of free electrons in LXe (purity);...
Topics: AIR BREATHING BOOSTERS, DRAG COEFFICIENTS, EXTRACTION, HYPERSONIC SPEED, LAUNCH VEHICLES, PRESSURE...
175
175
Jul 26, 2010
07/10
by
Arepalli, Sivara
texts
eye 175
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comment 0
Laser Induced Fluorescence (LIF) studies are carried out on nitric oxide and oxygen molecules in the arc jet flows at the NASA Johnson Space Center Reentry Testing Facility. Measurements are taken in the free stream and from a blunt body shock layer. Tests are performed under different flow conditions to determine the feasibility and sensitivity of the LIF technique for various species. This is developed as a part of high enthalpy flow diagnostics and will be useful to elucidate the rotational...
Topics: DESIGN ANALYSIS, HARDWARE, LOGISTICS, SPACE SHUTTLE ORBITERS, HEAVY LIFT LAUNCH VEHICLES,...
270
270
Jul 12, 2010
07/10
by
Aronson, J.; Hall, E. J.; Lattanzi, A.; Miller, J
texts
eye 270
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comment 0
No Abstract Available
Topics: APOLLO PROJECT, DATA PROCESSING, INTEGRATED MISSION CONTROL CENTER, SPACE VEHICLE CHECKOUT PROGRAM,...
221
221
Jul 6, 2010
07/10
by
Artobolevskiy, I. I.; Kobrinskiy, A. Y
texts
eye 221
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The theory and principles of manipulator design is discussed. Different uses of manipulators are presented, including their use as space equipment. Designations are suggested for the basic elements of a manipulator.
Topics: SKYLAB PROGRAM, TELECOMMUNICATION, TELEVISION CAMERAS, REMOTE CONTROL, SATURN LAUNCH VEHICLES
Technology advancement is a primary goal for military space development. By staying ahead of the competition, space systems can offer unique battlefield capabilities. A number of space programs are increasingly behind schedule, over budget, and underperforming. This thesis explains the benefits the Evolved Expendable Launch Vehicle (EELV) Secondary Payload Adapter (ESPA) ring can offer programs experiencing technical immaturity or desiring responsive space. By understanding and adhering to the...
Topic: Launch vehicles (Astronautics)
505
505
Jul 11, 2010
07/10
by
Baker, C. R
texts
eye 505
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comment 0
Methods of capturing and reliquefying the cold hydrogen vapor produced during the fueling of aircraft designed to utilize liquid hydrogen fuel were investigated. An assessment of the most practical, economic, and energy efficient of the hydrogen recovery methods is provided.
Topics: LAUNCH VEHICLES, NASA PROGRAMS, ORGANIZATIONS, SCIENTISTS, UNITED STATES, X-405 ENGINE, LIQUID...
190
190
Jun 1, 2011
06/11
by
Balakumar, P
texts
eye 190
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comment 0
The transition process induced by the interaction of an isolated roughness with acoustic disturbances in the free stream is numerically investigated for a boundary layer over a flat plate with a blunted leading edge at a free stream Mach number of 3.5. The roughness is assumed to be of Gaussian shape and the acoustic disturbances are introduced as boundary condition at the outer field. The governing equations are solved using the 5'h-rder accurate weighted essentially non-oscillatory (WENO)...
Topics: SOLAR ELECTRIC PROPULSION, LAUNCH VEHICLES, SYSTEMS ANALYSIS, OUTER PLANETS EXPLORERS, PAYLOADS,...
444
444
Jun 9, 2011
06/11
by
Banks, Bruce A.; Gaier, James R.; Hung, Ching-Cheh; Walters, Patty A.; Sechkar, Ed; Panko, Scott; Kamiotis, Christina A
texts
eye 444
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Within NASA's Project Prometheus, high specific impulse ion thrusters for electric propulsion of spacecraft for the proposed Jupiter Icy Moon Orbiter (JIMO) mission to three of Jupiter's moons: Callisto, Ganymede and Europa will require high voltage operation to meet mission propulsion. The anticipated approx.6,500 volt net ion energy will require electrical insulation and propellant isolation which must exceed that used successfully by the NASA Solar Electric Propulsion Technology Readiness...
Topics: REUSABLE LAUNCH VEHICLES, AIRCRAFT DESIGN, NUMERICAL ANALYSIS, SUPPORT SYSTEMS, LOGISTICS
332
332
Jul 26, 2010
07/10
by
Banks, H. T.; Ito, K.; Wang, C
texts
eye 332
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comment 0
Wave equations with damping in the boundary conditions are considered. Techniques to ascertain the uniform preservation under approximation of exponential stability are presented. Several schemes for which preservation can be guaranteed are analyzed. Numerical results that demonstrate the lack of stability under approximation for several popular schemes (including standard finite difference and finite element schemes) are given.
Topics: EARTH SCIENCES, SYNCHRONOUS PLATFORMS, FINITE ELEMENT METHOD, MEASURE AND INTEGRATION, SPACE...
282
282
Jun 21, 2010
06/10
by
Barber, H. T., Jr.; Lundstrom, R. R
texts
eye 282
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comment 0
No Abstract Available
Topics: MISSILE RANGES, MISSILE TESTS, POSTFLIGHT ANALYSIS, RANGER 5 LUNAR PROBE, AGENA B ROCKET VEHICLE,...
260
260
Jun 1, 2011
06/11
by
Barbieri, Enrique; Richter, Hanz; Figueroa, Fernand
texts
eye 260
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comment 0
We continue to build on the theoretical modelling of a liquid hydrogen (LH2) and gas hydrogen (GH2) mixer subsystem. The mixer described in this work is responsible for combining high pressure LH2 and GH2 to produce a hydrogen flow that meets certain thermodynamic properties. The desired properties are maintained by precise control of the LH2 and GH2 flows. The mixer is modelled as a general multi-flow lumped volume for single constituent fluids using density and internal energy as states. The...
Topics: SPACECRAFT LAUNCHING, AIRCRAFT FUEL SYSTEMS, STAGE SEPARATION, SPACECRAFT RELIABILITY, REUSABLE...
215
215
May 23, 2011
05/11
by
Barnhart, Paul J.; Greber, Isaa
texts
eye 215
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A series of experiments were performed to investigate the effects of Mach number variation on the characteristics of the unsteady shock wave/turbulent boundary layer interaction generated by a blunt fin. A single blunt fin hemicylindrical leading edge diameter size was used in all of the experiments which covered the Mach number range from 2.0 to 5.0. The measurements in this investigation included surface flow visualization, static and dynamic pressure measurements, both on centerline and...
Topics: REENTRY TRAJECTORIES, APPROXIMATION, REUSABLE LAUNCH VEHICLES, HYPERSONIC VEHICLES, CONVECTIVE HEAT...
312
312
Jun 12, 2011
06/11
by
Barnwell, William Garrar
texts
eye 312
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comment 0
An array of effectors and sensors has been designed, tested and implemented on a Blended Wing Body Uninhabited Aerial Vehicle (UAV). The UAV is modified to serve as a flying, controls research, testbed. This effector/sensor array provides for the dynamic vehicle testing of controller designs and the study of decentralized control techniques. Each wing of the UAV is equipped with 12 distributed effectors that comprise a segmented array of independently actuated, contoured control surfaces. A...
Topics: COMPUTERIZED SIMULATION, LIFE CYCLE COSTS, STOCHASTIC PROCESSES, COMPLEX SYSTEMS, MATHEMATICAL...
196
196
Jun 12, 2011
06/11
by
Barrientos, Francesca; Tumer, Irem; Grantham, Katie; VanWie, Michael; Stone, Rober
texts
eye 196
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comment 0
The concept of function offers a high potential for thinking and reasoning about designs as well as providing a common thread for relating together other design information. This paper focuses specifically on the relation between function and risk by examining how this information is addressed for a design team conducting early stage design for space missions. Risk information is decomposed into a set of key attributes which are then used to scrutinize the risk information using three...
Topics: LIQUID PROPELLANT ROCKET ENGINES, TEST FACILITIES, ENGINE TESTS, EVALUATION, PROPULSION, LAUNCH...
232
232
May 6, 2010
05/10
by
Barten, K. S
texts
eye 232
favorite 0
comment 0
Checkout and launch procedures for delta launch vehicle
Topics: CHECKOUT, LAUNCHING, DELTA LAUNCH VEHICLE, LAUNCH VEHICLES, LAUNCHING, SCHEDULING, SPACECRAFT...
172
172
May 29, 2011
05/11
by
Basol, B. M.; Kapur, V. K.; Minnick, A.; Halani, A.; Leidholm, C. R
texts
eye 172
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comment 0
Great advances have been made in polycrystalline thin film terrestrial solar cell technologies since early 1980's when the first promising laboratory devices with high efficiencies were demonstrated. These cells were fabricated on polycrystalline CdTe and CuInSe2 (CIS) layers and they had AM1.5 conversion efficiencies of around 10. During the last decade, the polycrystalline thin film solar cell efficiencies have improved to over 15 range and the stability data obtained from these devices has...
Topics: RESEARCH AND DEVELOPMENT, MISSION PLANNING, PAYLOADS, LAUNCHING, TECHNOLOGIES, LAUNCH VEHICLES,...
451
451
Jun 19, 2010
06/10
by
Bauer, H. F
texts
eye 451
favorite 0
comment 0
Interaction of sloshing propellant in tank with launch vehicle stability and control
Topics: BAFFLES, STABILITY AND CONTROL, CONTAINERS, LAUNCH VEHICLES, LIQUID SLOSHING, PROPELLANT TANKS,...
197
197
May 31, 2011
05/11
by
Behar, Ehud; Rasmussen, Andrew; Griffiths, R. Gareth; Dennerl, Konrad; Audard, Marc; Aschenbach, Bern
texts
eye 197
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comment 0
The observation of the supernova remnant N132D by the scientific instruments on board the XMM-Newton satellite is presented. The X-rays from N132D are dispersed into a detailed line-rich spectrum using the Reflection Grating Spectrometers. Spectral lines of C, N, O, Ne, Mg, Si, S, and Fe are identified. Images of the remnant, in narrow wavelength bands, produced by the European Photon Imaging Cameras reveal a complex spatial structure of the ionic distribution. While K - shell Fe seems to...
Topics: SENSITIVITY ANALYSIS, FAILURE MODES, FINITE ELEMENT METHOD, THERMODYNAMICS, THERMAL ANALYSIS,...
198
198
May 29, 2011
05/11
by
Bell, Ann Mari
texts
eye 198
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comment 0
This paper examines the performance of simple learning rules in a complex adaptive system based on a coordination problem modeled on the El Farol problem. The key features of the El Farol problem are that it typically involves a medium number of agents and that agents' pay-off functions have a discontinuous response to increased congestion. First we consider a single adaptive agent facing a stationary environment. We demonstrate that the simple learning rules proposed by Roth and Er'ev can be...
Topics: SPACE TRANSPORTATION, SPACE SHUTTLES, MANNED SPACE FLIGHT, REUSABLE LAUNCH VEHICLES, NASA PROGRAMS,...
34
34
Oct 11, 2019
10/19
by
Benson, Charles D
texts
eye 34
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comment 0
xvi, 317-551, xvii-xcvii p. : 23 cm
Topics: Saturn Project (U.S.), Project Apollo (U.S.), Saturn launch vehicles
207
207
May 30, 2011
05/11
by
Bhatia, A. K.; Temkin, A
texts
eye 207
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We report on the first part of a study of electron-hydrogen scattering, using a method which allows for the ab initio calculation of total and elastic cross sections at higher energies. In its general form the method uses complex 'radial' correlation functions, in a (Kohn) T-matrix formalism. The titled method, abbreviated Complex Correlation Kohn T (CCKT) method, is reviewed, in the context of electron-hydrogen scattering, including the derivation of the equation for the (complex) scattering...
Topics: COMPOSITE STRUCTURES, FABRICATION, REUSABLE LAUNCH VEHICLES, TECHNOLOGY ASSESSMENT
298
298
Jul 26, 2010
07/10
by
Bhatt, Ramakrishna T
texts
eye 298
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comment 0
The room temperature mechanical properties of SiC fiber reinforced reaction bonded silicon nitride composites were measured after 100 hrs exposure at temperatures to 1400 C in nitrogen and oxygen environments. The composites consisted of approx. 30 vol percent uniaxially aligned 142 micron diameter SiC fibers in a reaction bonded Si3N4 matrix. The results indicate that composites heat treated in a nitrogen environment at temperatures to 1400 C showed deformation and fracture behavior equivalent...
Topics: AVIONICS, COST ESTIMATES, HEAVY LIFT LAUNCH VEHICLES, SYSTEMS SIMULATION, TEST FACILITIES, COST...
223
223
Jul 26, 2010
07/10
by
Bigelow, C. A.; Naik, R. A
texts
eye 223
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comment 0
A macro-micromechanics analysis was formulated to determine the matrix and fiber behavior near the notch tip in a center-notched metal matrix composite. Results are presented for a boron/aluminum monolayer. The macro-level analysis models the entire notched specimen using a three dimensional finite element program which uses the vanishing-fiber-diameter model to model the elastic-plastic behavior of the matrix and the elastic behavior of the fiber. The micro-behavior is analyzed using a...
Topics: APOLLO 7 FLIGHT, POSTFLIGHT ANALYSIS, SATURN 1B LAUNCH VEHICLES, SPACECRAFT LAUNCHING, SPACECRAFT...
194
194
Jun 12, 2011
06/11
by
Bilimoria, Karl D.; Lee, Hilda Q
texts
eye 194
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comment 0
The Distributed Air/Ground Traffic Management (DAG-TM) concept of operations permits appropriately equipped aircraft to conduct Free Maneuvering operations. These independent aircraft have the freedom to optimize their trajectories in real time according to user preferences; however, they also take on the responsibility to separate themselves from other aircraft while conforming to any local Traffic Flow Management (TFM) constraints imposed by the air traffic service provider (ATSP). Examples...
Topics: LAUNCH VEHICLES, STRUCTURAL WEIGHT, LIQUID OXYGEN, LIQUID HYDROGEN, SINGLE STAGE TO ORBIT VEHICLES,...
749
749
Jun 20, 2010
06/10
by
Billiodeau, A. C
texts
eye 749
favorite 0
comment 0
Environmental and function tests of pressure gauges for systems at Launch Complexes 34 and 37 at KSC
Topics: ENVIRONMENTAL TESTS, SATURN IB LAUNCH VEHICLE, LAUNCHING BASES, MEASURING INSTRUMENTS, PERFORMANCE...
47
47
Oct 11, 2019
10/19
by
Bilstein, Roger E
texts
eye 47
favorite 1
comment 0
xxiv, 511 p. : 23 cm
Topics: Saturn Project (U.S.) -- History, Project Apollo (U.S.) -- History, Saturn launch vehicles --...
10,348
10K
Apr 4, 2007
04/07
by
Bilstein, Roger E; United States. National Aeronautics and Space Administration. History Office
texts
eye 10,348
favorite 5
comment 0
Includes bibliographical references (p. 493-500) and index
Topics: Project Apollo (U.S.), Saturn Project (U.S.), Saturn launch vehicles -- History, Apollo 11 flight,...
176
176
Sep 20, 2010
09/10
by
Bischoff, L.; Dressler, B. O.; Avermann, M. E.; Brockmeyer, P.; Lakomy, R.; Mueller-Mohr, V
texts
eye 176
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comment 0
In cooperation between the Ontario Geological Survey and the Institute of Geology and Institute of Planetology, geological, petrological, and geochemical studies were carried out on impact-related phenomena of the Sudbury structure during the last decade. The main results of the field studies are briefly reviewed. Footwall rocks, sublayer, and lower sections of the Sudbury Igneous Complex (SIC) were mainly mapped and sampled in the northern (Levack Township) and western (Trillabelle and Sultana...
Topics: APOLLO PROJECT, PROPULSION SYSTEM PERFORMANCE, SKYLAB 4, THERMAL ENVIRONMENTS, POSTFLIGHT ANALYSIS,...
255
255
Jul 5, 2010
07/10
by
BODULINSKIY, V. K.; MEDVEDYEV, Y. A
texts
eye 255
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comment 0
THE CHARACTERISTICS METHOD OF ANALYSIS, EMPLOYING INTEGRAL TRANSFORMATIONS, WAS USED. IT DESCRIBES A PRIMARY DIMENSION PHYSICAL PHENOMENON: MAGNETIC FIELD COMPRESSION IN A COLLAPSING SPHERICAL CAVITY.
Topics: LOADS (FORCES), SATURN 5 LAUNCH VEHICLES, VIBRATION TESTS, CONFERENCES, ENVIRONMENTAL TESTS
Creating simplicity out of complexity, this research abandons the traditional guidance and control architecture for aerospace vehicles and embraces a revolutionary concept based on the principles of nonlinear optimal control theory. Motivated by the emerging needs of the next generation of reusable space vehicles, an autonomous \"integrated\" guidance and control system is developed that provides a safe approach to the highly constrained and nonlinear reentry problem. A...
Topics: Engineering., Optimal Guidance and Control, Nonlinear Trajectory Optimization, Reentry, X-33,...
241
241
May 31, 2011
05/11
by
Booth, Earl R., Jr.; Wilbur, Matthew L
texts
eye 241
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comment 0
The use of an Active Twist Rotor system to provide both vibration reduction and performance enhancement has been explored in recent analytical and experimental studies. Effects of active-twist control on rotor noise, however, had not been determined. During a recent wind tunnel test of an active-twist rotor system, a set of acoustic measurements were obtained to assess the effects of active-twist control on noise produced by the rotor, especially blade-vortex interaction (BVI) noise. It was...
Topics: REUSABLE LAUNCH VEHICLES, X-33 REUSABLE LAUNCH VEHICLE, AEROSPACE SAFETY, MONTE CARLO METHOD,...
205
205
Jun 1, 2011
06/11
by
Bosilovich, Michael G.; Sud, Yogesh C.; Schubert, Siegfried D.; Walker, Gregory K
texts
eye 205
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comment 0
A general circulation model (GCM) that includes water vapor tracer (WVT) diagnostics is used to delineate the dominant sources of water vapor for precipitation during the North American monsoon. A 15-year model simulation carried out with one-degree horizontal resolution and time varying sea surface temperature is able to produce reasonable large-scale features of the monsoon precipitation. Within the core of the Mexican monsoon, continental sources provide much of the water for precipitation....
Topics: DUCTS, ASYMMETRY, FAR FIELDS, LAUNCH VEHICLES, NOISE REDUCTION, COMPUTERIZED SIMULATION, SOUND...
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May 31, 2011
05/11
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Bowlin, Gary L.; Simpson, David G.; Lam, Philippe; Wnek, Gary E
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Significant opportunities exist for the processing of synthetic and biological polymers using electric fields ('electroprocessing'). We review casting of multi-component films and the spinning of fibers in electric fields, and indicate opportunities for the creation of smart polymer systems using these approaches. Applications include 2-D substrates for cell growth and diagnostics, scaffolds for tissue engineering and repair, and electromechanically active biosystems.
Topics: LAUNCH VEHICLES, PRESSURE VESSELS, TANKS (CONTAINERS), PERFORMANCE TESTS, DUCTS, LININGS, FUEL...
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May 30, 2011
05/11
by
Boyan, Justin; Mitzenmacher, Michae
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In the bus network problem, the goal is to generate a plan for getting from point X to point Y within a city using buses in the smallest expected time. Because bus arrival times are not determined by a fixed schedule but instead may be random. the problem requires more than standard shortest path techniques. In recent work, Datar and Ranade provide algorithms in the case where bus arrivals are assumed to be independent and exponentially distributed. We offer solutions to two important...
Topics: HIGH TEMPERATURE, STRUCTURAL STRAIN, MECHANICAL PROPERTIES, REUSABLE LAUNCH VEHICLES, POLYIMIDES,...
