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Planetary Science Decadal Survey
Planetary Science Decadal Survey
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NASA Technical Documents
by Wolverton, B. C.; Douglas, Willard L.; Bounds, Keit
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Previously, preliminary data on the ability of a group of common indoor plants to remove organic chemical from indoor air was presented. The group of plants chosen for this study was determined by joint agreement between NASA and the Associated Landscape Contractors of America. The chemicals chosen for study were benzene, trichloroethylene, and formaldehyde. The results show that plants can play a major role in removal of organic chemicals from indoor air.
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Topics: ARTIFICIAL INTELLIGENCE, FUZZY SETS, FUZZY SYSTEMS, NEURAL NETS, SET THEORY, DYNAMICAL SYSTEMS,...
NASA Technical Documents
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Independent Tracking Coordination Program - trigonometric tables for calculating coordinates of satellites
Topics: COORDINATES, TRACKING SYSTEM, TRIGONOMETRY, COORDINATION, MATHEMATICAL TABLES, SATELLITE TRACKING,...
NASA Technical Documents
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All the basic areas of anthropometry and its applications to the design of clothing, equipment, and workspaces for manned space flight are presented.
Topics: CANCER, NEOPLASMS, RADIOBIOLOGY, TUMORS, CONFERENCES, HYPERTHERMIA, RADIATION THERAPY, RADIO...
NASA Technical Documents
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Transformation of data into knowledge through conceptual induction has been the focus of our research described in this paper. We have developed a Machine Learning System (MLS) to analyze the rocket engine simulation data. MLS can provide to its users fault analysis, characteristics, and conceptual descriptions of faults, and the relationships of attributes and sensors. All the results are critically important in identifying faults.
Topics: DYNAMIC LOADS, DIMENSIONAL ANALYSIS, FAILURE MODES, LOAD DISTRIBUTION (FORCES), STRAIN...
Methane, methanol, glycerol, and hydrocarbons for microbial life support systems on extended space missions, animal links in closed system, use of wastes, and chemical synthesis of food
Topics: HYDROCARBONS, HUMAN WASTES, MICROBIOLOGY, MICROORGANISMS, NUTRIENTS, SPACE MISSIONS, SPACECRAFT...
NASA Technical Documents
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This handbook is intended to provide a ready reference for many of the solid and liquid lubricants used in the space industry. Lubricants and lubricant properties are arranged systematically so that designers, engineers, and maintenance personnel can conveniently locate data needed for their work. This handbook is divided into two major parts (A and B). Part A is a compilation of solid lubricant suppliers information on chemical and physical property of data of more than 250 solid lubricants,...
Topics: ARIZONA, GEOCHRONOLOGY, GEOLOGICAL FAULTS, GEOMAGNETISM, ROCK MECHANICS, TECTONICS, MAPPING,...
NASA Technical Documents
by Oberth, H
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A theoretical analysis of the parameters involved in spacecraft design and propulsion and the successful completion of space missions is presented. Various types of rockets and their specialized application are described. The physiological effects of space flight are discussed. The requirements for fuel, specific impulse, and energy considerations are included.
Topics: BOUNDARY LAYER SEPARATION, DIFFUSERS, NONUNIFORM FLOW, SEPARATED FLOW, PRESSURE GRADIENTS, VELOCITY...
NASA Technical Documents
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No Abstract Available
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Topics: ARTIFICIAL SATELLITES, GRAVITATIONAL FIELDS, PLANETARY ROTATION, SATELLITE PERTURBATION, ORBIT...
NASA Technical Documents
by Dick, Steven J.; Strick, James E
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In the opening weeks of 1998 a news article in the British journal Nature reported that NASA was about to enter biology in a big way. A ''virtual'' Astrobiology Institute was gearing up for business, and NASA administrator Dan Goldin told his external advisory council that he would like to see spending on the new institute eventually reach 100 million per year. ''You just wait for the screaming from the physical scientists (when that happens),'' Goldin was quoted as saying. Nevertheless, by the...
Topics: CHONDRULE, COOLING, HEATING, PETROGRAPHY, NEBULAE, OLIVINE, PLAGIOCLASE, PYROXENES, METEORITIC...
NASA Technical Documents
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No Abstract Available
Topics: APOLLO PROJECT, COMMAND SERVICE MODULES, LUNAR MODULE, MISSION PLANNING, SPACECRAFT DESIGN, SPACE...
NASA Technical Documents
by Gorlin, S. M.; Slezinger, I. I
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Wind tunnels for measuring aerodynamic characteristics
Topics: AERODYNAMIC CHARACTERISTICS, WIND TUNNELS, AERODYNAMIC CHARACTERISTICS, WIND TUNNEL
NASA Technical Documents
by Douglas, F. J
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Digital computer programs for analysis of large complex structures applied to NASTRAN project
Topics: EARTH IONOSPHERE, NONLINEARITY, PHASE VELOCITY, PLASMAS (PHYSICS), WAVE ATTENUATION, ELECTRIC...
NASA Technical Documents
by Walter, Neil A.; Scialdone, John J
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Outgassing data, derived from tests at 398 K (125 C) for 24 hours in a vacuum as per ASTM E 595-84, have been compiled for numerous materials for spacecraft use. The data presented are the total mass loss (TML) and the collected volatile condensable materials (CVCM). The various materials are compiled by likely usage and alphabetically.
Topics: AMINO ACIDS, VEGETATION GROWTH, POTATOES, SUBSTITUTES, PROTEINS, CALMODULIN
Planetary Science Decadal Survey
by Steven A. Hauck, II, Douglas A. Eng and George J. Tahu
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The purpose of this study was to determine the feasibility of a landed mission to Mercury. It was conducted by the JHU/APL Space Department in partnership with Marshall Space Flight Center, Glen Research Center, and Steven Hauck from Case Western Reserve University. This was conducted as a concept maturity level (CML) 3 study focusing on feasibility trades and options for concepts with a goal of determining whether such a mission could be accomplished within a Principal Investigator (PI)-led...
Topics: Mercury, Concept Study, NASA, Lander, Mission, Decadal
Planetary Science Decadal Survey
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Near Earth objects (NEOs) are attractive targets for spacecraft missions with the purpose of obtaining greater insight to the nature of the original bodies from which the terrestrial planets formed, without having to visit the Main Belt itself. Greater knowledge of NEOs directly sheds light on the origin and evolution of the asteroid belt, the formation of planets, and the history of the solar system. This report describes a search for NEOs that would be accessible for missions launching in...
Topics: Asteroids, NASA, Decadal, Trajectory Opportunities, Survey, Near Earth Asteroids, NEOs
NASA Technical Documents
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The Scout launch vehicle program, hardware, and systems are reviewed. Scout reliability and quality assurance provisions, procurement, launch sites and facilities, and financial data are also reported.
Topics: COMPUTER PROGRAMMING, LIFE CYCLE COSTS, MISSILES, QUANTITATIVE ANALYSIS, SEMANTICS, COMPUTER...
NASA Technical Documents
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This publication contains extended abstracts of papers presented at the Nineteenth International Laser Radar Conference, held at Annapolis, Maryland, July 6-10, 1998; 260 papers were presented in both oral and poster sessions. The topics of the conference sessions were Aerosol Clouds, Multiple Scattering; Tropospheric Profiling; Stratospheric/Mesospheric Profiling; Wind Profiling; New Lidar Technology and Techniques; Lidar Applications, including Altimetry and Marine; Space and Future Lidar;...
Topics: X-15 AIRCRAFT, PILOT TRAINING, AIRSPEED, AERODYNAMIC CHARACTERISTICS, ANGLE OF ATTACK, LIFT DRAG...
NASA Technical Documents
by Braverman, A. S.; Grodko, L. N.; Leykand, M. A.; Mil, M. L.; Nekrasov, A. V
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Rotor aerodynamics in relation to historical and ideal development of helicopters
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Topics: AERODYNAMICS, HELICOPTER DESIGN, HELICOPTERS, HISTORIES, ROTOR AERODYNAMICS, HELICOPTER DESIGN,...
NASA Technical Documents
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AERODYNAMICS AND FLIGHT DYNAMICS OF TURBOJET AIRCRAFT
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Topics: ELECTRIC ARCS, ELECTRICAL RESISTIVITY, HIGH TEMPERATURE AIR, THERMAL CONDUCTIVITY, THERMAL PLASMAS,...
NASA Technical Documents
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No Abstract Available
Topics: COMMUNICATION NETWORKS, RELIABILITY ENGINEERING, TOPOLOGY, FAILURE ANALYSIS, FAULT TREES, GRAPH...
NASA Technical Documents
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This book is, in essence, sixteen years in the making. First attempted to compile a history of the Soviet space program in 1982 author put together a rough chronology of the main events. A decade later, while living on a couch in a college friend's apartment, he began writing what would be a short history of the Soviet lunar landing program. The first draft was sixty-nine pages long. Late the following year, he decided to expand the topic to handle all early Soviet piloted exploration programs....
Topics: STATISTICAL ANALYSIS, RADIATIVE TRANSFER, SOLAR RADIATION, CLOUD COVER, CLOUDS (METEOROLOGY),...
Planetary Science Decadal Survey
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The Enceladus Orbiter (EO) mission would explore Saturn's moon Enceladus, investigating the following in order of priority: -The nature of Enceladus's cryovolcanic activity -The internal structure and chemistry of Enceladus -The geology of Enceladus -The interaction of Enceladus with the Saturn system -The surfaces and interiors of Saturn's moons Rhea, Dione and Tethys -Preparation for potential future landing on Enceladus
Topics: Enceladus, NASA, MIssion Concept Study, Decadal
NASA Technical Documents
by HOHMANN, WALTE
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THIS WORK (ORIGINALLY PUBLISHED IN 1925) CONTRIBUTES TO RECOGNITION OF THE FEASIBILITY OF SPACE TRAVEL. TREATED ARE PROBLEMS ASSOCIATED WITH LEAVING THE EARTH, RETURN TO EARTH, FREE-SPACE FLIGHT, CIRCUM-NAVIGATION OF CELESTIAL OBJECTS, AND LANDING ON OTHER CELESTIAL OBJECTS.
Topics: DIFFUSION THEORY, REACTIVITY, DIFFUSION, SIMULATORS, SHIELDING
NASA Technical Documents
by BAZOV, D. I
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PRINCIPLES OF HELICOPTER FLIGHT UNDER VARIOUS CONDITIONS ARE REVIEWED, GIVING SPECIAL ATTENTION TO THE OPERATION OF THE MAIN ROTOR. A BRIEF HISTORY OF HELICOPTER DEVELOPMENT IS PRESENTED, TOGETHER WITH A SUMMARY OF THE MAIN COMPONENTS OF A HELICOPTER AND A CLASSIFICATION OF THE VARIOUS TYPES OF HELICOPTERS. THE CHARACTERISTICS OF THE MAIN ROTOR AND ITS OPERATION DURING AUTOROTATION AND DURING AXIAL AND OBLIQUE FLOW ARE CONSIDERED. ALSO CONSIDERED ARE VERTICAL AND HORIZONTAL FLIGHT, ALTITUDE...
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Topics: BALL BEARINGS, FATIGUE TESTS, LUBRICATING OILS, SERVICE LIFE, STEELS, AIRCRAFT ENGINES, HIGH...
NASA Technical Documents
by Tomayko, James E
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This book examines the computer systems used in actual spaceflight or in close support of it. Each chapter deals with either a specific program, such as Gemini or Apollo onboard computers, or a closely related set of systems, such as launch processing or mission control. A glossary of computer terms is included.
Topics: BRIGHTNESS, STABILITY, TRAJECTORY ANALYSIS, QUASARS, STATISTICAL ANALYSIS, VARIABILITY, ASYMPTOTIC...
NASA Technical Documents
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Given here are extended abstracts of papers presented at the 16th International Laser Radar Conference, held in Cambridge, Massachusetts, July 20-24, 1992. Topics discussed include the Mt. Pinatubo volcanic dust laser observations, global change, ozone measurements, Earth mesospheric measurements, wind measurements, imaging, ranging, water vapor measurements, and laser devices and technology.
Topics: ATMOSPHERIC COMPOSITION, ATMOSPHERIC CHEMISTRY, POSTLAUNCH REPORTS, SPACE SHUTTLES, SPACE...
The AIAA/NASA Conference on Intelligent Robotics in Field, Factory, Service, and Space (CIRFFSS '94) was originally proposed because of the strong belief that America's problems of global economic competitiveness and job creation and preservations can partly be solved by the use of intelligent robotics, which are also required for human space exploration missions. Individual sessions addressed the following topics: (1) vision systems integration and architecture; (2) selective perception and...
Topics: COMPUTER NETWORKS, CENTRAL PROCESSING UNITS, RESEARCH AND DEVELOPMENT, COMPUTER SYSTEMS DESIGN,...
NASA Technical Documents
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This bibliography lists 193 reports, journal articles, and other documents introduced in the NASA scientific and technical system in Aug. 1995. Subject coverage includes documents on the engineering and theoretical aspects of design, construction, evaluation, testing, operation, and performance of aircraft (including aircraft engines) and associated components, equipment, and systems. It also includes research and development in aerodynamics, aeronautics, and ground support equipment for...
Topics: AEROSPACE PLANES, COMBUSTION CHAMBERS, INLET NOZZLES, MACH NUMBER, NATIONAL AEROSPACE PLANE...
NASA Technical Documents
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No Abstract Available
Topics: CANARD CONFIGURATIONS, CONTROL STABILITY, FLIGHT TESTS, LONGITUDINAL STABILITY, LOW ASPECT RATIO...
NASA Technical Documents
by Bornemann, W. E.; Surber, T. E
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An overview of the wind tunnel program is given and aerodynamic characteristics of the final configuration are described. Aerodynamic parameters critical to definition of Orbiter entry control and performance are identified. Trim capability and stability and control characteristics are discussed at critical regions in the entry trajectory. Methods are described to define reaction control rocket effectiveness and aerodynamic interactions during the initial portion of entry. At hypersonic speeds,...
Topics: ANGLES (GEOMETRY), AXISYMMETRIC FLOW, EXTERNALLY BLOWN FLAPS, JET IMPINGEMENT, OBLIQUE WINGS,...
NASA Technical Documents
by Markley, F. Landis; Mortari, Daniel
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This paper contains a critical comparison of estimators minimizing Wahba's loss function. Some new results are presented for the QUaternion ESTimator (QUEST) and EStimators of the Optimal Quaternion (ESOQ and ESOQ2) to avoid the computational burden of sequential rotations in these algorithms. None of these methods is as robust in principle as Davenport's q method or the Singular Value Decomposition (SVD) method, which are significantly slower. Robustness is only an issue for measurements with...
Topics: HEATING EQUIPMENT, FISSION, TEST FACILITIES, RESEARCH FACILITIES, POWER REACTORS, PROPULSION
NASA Technical Documents
by Brennan, P. J.; Kroliczek, E. J
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No Abstract Available
Topics: HYDROGEN OXYGEN ENGINES, TURBOROCKET ENGINES, ORBIT TRANSFER VEHICLES, ROCKET ENGINE DESIGN,...
NASA Technical Documents
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Volume 2 contains data resulting from surveys of 61 military and civilian populations of both sexes from the U.S., Europe, and Asia. Some 295 measured variables are defined and illustrated.
Topics: ANTHROPOMETRY, SIZE DETERMINATION, SPACECRAFT DESIGN, SPACECRAFT ENVIRONMENTS, BODY SIZE (BIOLOGY),...
NASA Technical Documents
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This paper describes the development of a methodology for sizing Blended-Wing-Body (BWB) transports and how the capabilities of the Flight Optimization System (FLOPS) have been expanded using that methodology. In this approach, BWB transports are sized based on the number of passengers in each class that must fit inside the centerbody or pressurized vessel. Weight estimation equations for this centerbody structure were developed using Finite Element Analysis (FEA). This paper shows how the...
Topics: PRESSURE SENSORS, LOOP ANTENNAS, FREQUENCY RANGES, RADIO FREQUENCIES, SIGNAL PROCESSING,...
NASA Technical Documents
by Levinson, I. B.; Sen, A.; Sen, R. N.; Vanagas, V. V.; Yutsis, A. P
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Mathematical analysis of angular momentum
Topics: ANGULAR MOMENTUM, ANGULAR VELOCITY, ANGULAR MOTION, MATHEMATICS /GEN/
NASA Technical Documents
by Tsiolkovskiy, K. E
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A classical, comprehensive collection of theoretical studies on interplanetary space travel, jet propulsion, and rocket technology is presented. Topics treated are: (1) escape velocity; (2) trajectories; (3) design considerations; (4) fuels; (5) food supplies and spacecraft environment during spaceflight; and (6) the general mechanics of spaceflight.
Topics: COMBUSTION CHAMBERS, EXHAUST GASES, POLLUTION CONTROL, AIR POLLUTION, DESIGN ANALYSIS
NASA Technical Documents
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This bibliography lists 822 reports, articles and other documents introduced into the NASA Scientific and Technical Information System in 1988. Items are selected and grouped according to their usefulness to the manager as manager. Citations are grouped into ten subject categories: human factors and personnel issues; management theory and techniques; industrial management and manufacturing; robotics and expert systems; computers and information management; research and development; economics,...
Topics: ALGORITHMS, KALMAN FILTERS, LEAST SQUARES METHOD, NAVIGATION, POSITION ERRORS, POWER SPECTRA, RADAR...
Planetary Science Decadal Survey
by Marc Buie, Joe Veverka
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The National Research Council's Planetary Science Decadal Survey: Primitive Bodies Panel has commissioned NASA's Goddard Space Flight Center (GSFC) with a rapid architecture study conducted under NASA Headquarters leadership. The purpose of the study is to determine whether a mission to orbit the Centaur Object Chiron can be achieved within a New Frontiers cost range with a limited supply of Advanced Stirling Radioisotope Generators (ASRGs). Guidelines include a launch between 2015 and 2025, a...
Topics: Chiron, Orbiter, NASA, Mission Concept Study, Decadal
Z-function solutions for motion and heating during atmosphere entry from equatorial orbits of rotating planets
Topics: ATMOSPHERIC ENTRY, MOTION, PLANET, REENTRY, Z FUNCTION, EQUATORIAL ORBITS, HEATING, MOTION,...
NASA Technical Documents
by NON
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The dynamic structural analysis of rotary winged aircraft is reported, considering helicopter vibration and loads.
Topics: MISSION PLANNING, RADAR MAPS, VENUS (PLANET), AIRBORNE RADAR, PHOTOGRAPHY, PLANETARY SURFACES,...
Operating manual for FORTRAN program to predict aerodynamic and heat transfer characteristics of annular and rectangular gas turbine combustors
Topics: FORTRAN, FLOW CHARTS, INLET FLOW, NOZZLE DESIGN, HEAT TRANSFER, MANUALS, SUBROUTINES, AERODYNAMIC...
Integral equations for logarithmical normal law of dimension distributions of fragmented particles
Topics: CAVITATION CORROSION, COBALT ALLOYS, LIQUID SODIUM, PRESSURE EFFECTS, TEMPERATURE EFFECTS, GRAPHS...
NASA Technical Documents
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Planning, development, design, manufacture, and testing for Mariner Mars 1969 project - Vol. 1
Topics: DEEP SPACE INSTRUMENTATION FACILITY, DEEP SPACE NETWORK, INTERPLANETARY SPACECRAFT, MARS 71...
The National Aeronautics and Space Administration (NASA) is aware of the potential toxicological hazards to humans that might be associated with prolonged spacecraft missions. Despite major engineering advances in controlling the atmosphere within spacecraft, some contamination of the air appears inevitable. NASA has measured numerous airborne contaminants during space missions. As the missions increase in duration and complexity, ensuring the health and well-being of astronauts traveling and...
Topics: LIFE SCIENCES, BIBLIOGRAPHIES, MICROGRAVITY, AEROSPACE MEDICINE, BIOASTRONAUTICS, EXOBIOLOGY, LIFE...
Possible compounds for the 9.7 micron spectral feature and the 2175A spectral bump are examined. Results from electron microscopy and high resolution transmission electron microscopy are discussed.
Topics: COSMIC DUST, INFRARED SPECTRA, RADIO SPECTRA, RADIATION PRESSURE, RED GIANT STARS, STELLAR...
Planetary Science Decadal Survey
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The Moon's regolith contains vast resources of helium-3 an ideal fuel for terrestrial fusion power systems. Development of plans for private sector investment in obtaining helium-3 and its by-products requires detailed definition of that isotope's selenographic distribution.
NASA Technical Documents
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The main theme of this edition of the annual Research and Technology Report is Mission Operations and Data Systems. Shifting from centralized to distributed mission operations, and from human interactive operations to highly automated operations is reported. The following aspects are addressed: Mission planning and operations; TDRSS, Positioning Systems, and orbit determination; hardware and software associated with Ground System and Networks; data processing and analysis; and World Wide Web....
Topics: LIGHT MODULATORS, OPTICAL DATA PROCESSING, DYNAMIC RANGE, LOGARITHMS, PHOTORECEPTORS,...
NASA Technical Documents
by Engelbart, D. C.; English, W. K.; Huddart, B
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Human composition and modification of computer driven cathode ray tube display
Topics: CATHODE RAY TUBES, DISPLAY SYSTEM, COMPUTER PROGRAMS, COMPUTER TECHNIQUES, DISPLAY DEVICES, ON-LINE...
This first volume of the Autonomous Control Engineering (ACE) Center Press Series on NASA University Research Center's (URC's) Advanced Technologies on Space Exploration and National Service constitute a report on the research papers and presentations delivered by NASA Installations and industry and Report of the NASA's fourteen URC's held at the First National Conference in Albuquerque, New Mexico from February 16-19, 1997.
Topics: APPLICATIONS PROGRAMS (COMPUTERS), MODULES, PROGRAMMERS, WORKSTATIONS, PROTOTYPES, INTERNETS,...
NASA Technical Documents
by Lee, C. C
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Fortran program for design of pure external and internal-external expansion plug nozzles
Topics: APPLICATIONS PROGRAMS (COMPUTERS), FORTRAN, NOZZLE DESIGN, PLUG NOZZLES, FORTRAN, NOZZLE
NASA Technical Documents
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In August 1997, NASA sponsored a 3-day workshop to assess the prospects emerging from physics that may eventually lead to creating propulsion breakthroughs -the kind of breakthroughs that could revolutionize space flight and enable human voyages to other star systems. Experiments and theories were discussed regarding the coupling of gravity and electromagnetism, vacuum fluctuation energy, warp drives and wormholes, and superluminal quantum tunneling. Because the propulsion goals are presumably...
Topics: TEST CHAMBERS, AERODYNAMIC CHARACTERISTICS, HOT-WIRE ANEMOMETERS, FLOW DISTRIBUTION, WIND TUNNELS,...
NASA Technical Documents
by Krist, Sherrie L.; Biedron, Robert T.; Rumsey, Christopher L
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This document is the User's Manual for the CFL3D computer code, a thin-layer Reynolds-averaged Navier-Stokes flow solver for structured multiple-zone grids. Descriptions of the code's input parameters, non-dimensionalizations, file formats, boundary conditions, and equations are included. Sample 2-D and 3-D test cases are also described, and many helpful hints for using the code are provided.
Topics: NITRIC OXIDE, CARDIOVASCULAR SYSTEM, MOLECULES, ANTIDIURETICS, BARORECEPTORS, DEHYDRATION, DRUGS,...
NASA Technical Documents
by Leontev, U. N.; Vlasov, V. Z
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Theory based on Vlasov general variational method to analyze beams and plates on elastic foundations
Topics: ELASTIC PROPERTIES, FOUNDATIONS, PROBLEM SOLVING, VARIATIONAL PRINCIPLES, VLASOV EQUATIONS,...
This two volume publication presents the proceedings of the third through sixth history symposia of the International Academy of Astronautics. Thirty-nine papers are divided into four categories: (1) Early Solid Propellant Rocketry; (2) Rocketry and Astronautics: Concepts, Theory, and Analyses after 1880; (3) The Development of Liquid and Solid Propellant Rockets from 1880 to 1945; and (4) Rocketry and Astronautics after 1945. Categories 1 and 2 will be found in volume 1 and the remainder in...
Topics: ALGORITHMS, LEAST SQUARES METHOD, MATRICES (MATHEMATICS), MATHEMATICAL MODELS, ORTHOGONAL...
NASA Technical Documents
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A survey of studies into hazards associated with closed or pressurized system rupture and preliminary guidelines for the performance design of primary, secondary, and protective receptors of these hazards are provided. The hazards discussed in the survey are: blast, fragments, ground motion, heat radiation, biological, and chemical. Performance guidelines for receptors are limited to pressurized systems that contain inert gas. The performance guidelines for protection against the remaining...
Topics: GEARS, HELICOPTERS, TRANSMISSIONS (MACHINE ELEMENTS), VIBRATION, COMBAT, DATA BASES, EFFICIENCY,...
NASA Technical Documents
by Arbit, H. A.; Clapp, S. D.; Nagai, C. K
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Feasibility of lithium-fluorine-hydrogen propellant combination
Topics: COMETS, METEOROIDS, COSMOLOGY, DISRUPTING, SOLAR SYSTEM
NASA Technical Documents
by Anderson, W. J.; Bisson, E. E
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Fundamentals of friction and wear on fluid film and rolling-element bearings
Topics: BEARING, FLUID FILMS, FRICTION, WEAR, BEARING, FRICTION
Mariner r program specifications, design changes, and evaluation
Topics: DOCUMENTATION, MARINER PROGRAM, MARINER SPACECRAFT, MARINER R PROGRAM
NASA Technical Documents
by NON
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The Magellan radar-mapping mission to the planet Venus is described. Scientific highlights include the history of U.S. and Soviet missions, as well as ground-based radar observations, that have provided the current knowledge about the surface of Venus. Descriptions of the major Venusian surface features include controversial theories about the origin of some of the features. The organization of the Magellan science investigators into discipline-related task groups for data-analysis purposes is...
Topics: ATMOSPHERIC SOUNDING, TIROS N SERIES SATELLITES, CLOUD PHYSICS, HIGH RESOLUTION, SATELLITE...
NASA Technical Documents
by NON
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The User's Manual is one of four manuals that constitute the documentation for NASTRAN, the other three being the Theoretical Manual, the Programmer's Manual and the Demonstration Problem Manual. Although the User's Manual contains all of the information that is directly associated with the solution of problems with NASTRAN, the user will find it desirable to refer to the other manuals for assistance in the solution of specific user problems. The Theoretical Manual gives an excellent...
Topics: ALGORITHMS, COMPUTERIZED SIMULATION, DYNAMIC RESPONSE, FINITE ELEMENT METHOD, PARTIAL DIFFERENTIAL...
NASA Technical Documents
by NON
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The Aerospace Mechanisms Symposium (AMS) provides a unique forum for those active in the design, production and use of aerospace mechanisms. A major focus is reporting problems and solutions associated with the development and flight certification of new mechanisms. Organized by the Mechanisms Education Association, NASA and Lockheed Martin Space Systems Company (LMSSC) share the responsibility for hosting the AMS. Now in its 37th symposium, the AMS continues to be well attended, attracting...
Topics: FABRICATION, NONLINEARITY, STATIC TESTS, FINITE ELEMENT METHOD, MATHEMATICAL MODELS, STATISTICAL...
NASA Technical Documents
by NON
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The proceedings of the 32nd Aerospace Mechanism Symposium are reported. NASA John F. Kennedy Space Center (KSC) hosted the symposium that was held at the Hilton Oceanfront Hotel in Cocoa Beach, Florida on May 13-15, 1998. The symposium was cosponsored by Lockheed Martin Missiles and Space and the Aerospace Mechanisms Symposium Committee. During these days, 28 papers were presented. Topics included robotics, deployment mechanisms, bearing, actuators, scanners, boom and antenna release, and test...
Topics: ATOMIC PHYSICS, RESONANCE FLUORESCENCE, MAGNETICALLY TRAPPED PARTICLES, MONOCHROMATORS,...
NASA Technical Documents
by NON
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Pocket Statistics is published for the use of NASA managers and their staff. Included herein is Administrative and Organizational information, summaries of Space Flight Activity including the NASA Major Launch Record, and NASA Procurement, Financial, and Manpower data. The NASA Major Launch Record includes all launches of Scout class and larger vehicles. Vehicle and spacecraft development flights are also included in the Major Launch Record. Shuttle missions are counted as one launch and one...
Topics: A STARS, INFRARED RADIATION, MAIN SEQUENCE STARS, STELLAR EVOLUTION, STELLAR MASS, ASTRONOMY, DATA...
NASA Technical Documents
by Borowski, Oded; Howell, Burgess F.; Sever, Thomas L
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This paper examines the use of ancient fire and smoke signals for communication in the Kingdom of Judah. Historical and biblical references are cited that discuss this communication system. The current physical and political landscape of Israel precludes testing of hypotheses using traditional techniques. The use of a GIS is enlisted to overcome these obstacles and predict line-of-sight patterns that are conducive for a fire signal communication system. Final demonstration of this predictive...
Topics: SCANNING ELECTRON MICROSCOPY, PHOSPHATES, PROKARYOTES, MICROORGANISMS, MICROSTRUCTURE, CARBONACEOUS...
NASA Technical Documents
by Colozza, Anthony J.; Miller, Christopher J.; Reed, Brian D.; Kohout, Lisa L.; Loyselle, Patricia L
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The capabilities and performance of an aircraft depends greatly on the ability of the propulsion system to provide thrust. Since the beginning of powered flight, performance has increased in step with advancements in aircraft propulsion systems. These advances in technology from combustion engines to jets and rockets have enabled aircraft to exploit our atmospheric environment and fly at altitudes near the Earth's surface to near orbit at speeds ranging from hovering to several times the speed...
Topics: ACTIVE CONTROL, HEAT PIPES, OPERATING TEMPERATURE, TEMPERATURE CONTROL, EVAPORATORS, CONDENSERS...
NASA Technical Documents
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Aerodynamic characteristics of low-aspect-ratio wings at supersonic speeds
Topics: AERODYNAMIC CHARACTERISTICS, SUPERSONIC SPEED, DETACHMENT, HIGH SPEED, LOW ASPECT RATIO WINGS, MACH...
Planetary Science Decadal Survey
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This paper discusses the capability of currently available TPS and the availability of heritage carbon phenolic used on the Pioneer-Venus probes. A prime conclusion is that there are important issues regarding the availability of the TPS required for future Venus entry probes.
NASA Technical Documents
by Tada, H. Y.; Carter, J. R., Jr
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Solar cell theory cells are manufactured, and how they are modeled mathematically is reviewed. The interaction of energetic charged particle radiation with solar cells is discussed in detail and the concept of 1 MeV equivalent electron fluence is introduced. The space radiation environment is described and methods of calculating equivalent fluences for the space environment are developed. A computer program was written to perform the equivalent fluence calculations and a FORTRAN listing of the...
Topics: DIGITAL COMPUTERS, GATES (CIRCUITS), RADIATION, ARRAYS, ELECTROLUMINESCENCE, PARALLEL COMPUTERS,...
NASA Technical Documents
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Manual control is discussed in terms of operator modeling, measurement of human response, mental workload, pilot/operator opinion, effects of motion, aircraft displays, supervisory control, automobile driving, and remote manipulation.
Topics: COMPUTER NETWORKS, COMPUTER SYSTEMS DESIGN, COMPUTER SYSTEMS PERFORMANCE, DATA CONVERSION ROUTINES,...
No Abstract Available
Topics: FLUID MANAGEMENT, RETRAINING, SIMULATION, THRUST REVERSAL, VAPORS, GRAVITATIONAL EFFECTS, LIQUID...
NASA Technical Documents
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Wind tunnel tests of ground effect on aircraft models with short wingspans during takeoff and landing
Topics: AIRCRAFT MODELS, WIND TUNNEL, WING SPAN, GROUND EFFECT (AERODYNAMICS), LANDING, TAKEOFF, WIND...
NASA Technical Documents
by Wentz, Frank J
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This Final Report is a summary of the work that was performed under Contract NAS8-38075 between NASA Marshall Space Flight Center and Remote Sensing Systems from September 1989 to September 1992. The primary accomplishment was the delivery of Special Sensor Microwave/Imager (SSM/I) data tapes containing sensor and geophysical products. In all, 515 tapes (80 gigabytes) were delivered. These tapes contained the F08 SSM/I data for the period from July 1988 through December 1991 and the F10 SSM/I...
Topics: EDDY CURRENTS, MAGNETIC FIELDS, MECHANICAL ENGINEERING, REACTANCE, SHOT PEENING, IMPEDANCE, MACHINE...
NASA Technical Documents
by Tye, R. P.; Bourne, J. G.; Destarlais, A. O
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The thermophysical properties of salts having potential for thermal energy storage to provide peaking energy in conventional electric utility power plants were investigated. The power plants studied were the pressurized water reactor, boiling water reactor, supercritical steam reactor, and high temperature gas reactor. The salts considered were LiNO3, 63LiOH/37 LiCl eutectic, LiOH, and Na2B4O7. The thermal conductivity, specific heat (including latent heat of fusion), and density of each salt...
Topics: AERODYNAMICS, RESEARCH PROJECTS, WEST GERMANY, AIRFOILS, COMPRESSIBILITY EFFECTS, MISSILE DESIGN,...
NASA Technical Documents
by Criswell, D. R.; Waldron, R. D.; Mckenzie, J. D
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Three different chemical processing schemes were identified for separating lunar soils into the major oxides and elements. Feedstock production for space industry; an HF acid leach process; electrorefining processes for lunar free metal and metal derived from chemical processing of lunar soils; production and use of silanes and spectrally selective materials; glass, ceramics, and electrochemistry workshops; and an econometric model of bootstrapping space industry are discussed.
Topics: BODY TEMPERATURE, COMPUTERIZED SIMULATION, HEAT STORAGE, HUMIDITY, LIFE SUPPORT SYSTEMS, RADIANT...