282
282
May 21, 2011
05/11
by
Schuch, Diete
texts
eye 282
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According to Heisenberg's uncertainty relation, in quantum mechanics it is not possible to determine, simultaneously, exact values for the position and the momentum of a material system. Calculating the mean value of the Hamiltonian operator with the aid of exact analytic Gaussian wave packet solutions, these uncertainties cause an energy contribution additional to the classical energy of the system. For the harmonic oscillator, e.g., this nonclassical energy represents the ground state energy....
Topics: MANAGEMENT PLANNING, PAYLOAD INTEGRATION, PROJECT MANAGEMENT, SPACE STATION PAYLOADS, SPACEBORNE...
264
264
May 23, 2011
05/11
by
Voracek, David; Kolkailah, Faysal A.; Cavalli, J. R.; Elghandour, Eltahr
texts
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The objective of this study was to design and construct a vibration control system for an electronic equipment shelf to be evaluated in the NASA Dryden FTF-11. The vibration control system was a hybrid system which included passive and active damping techniques. Passive damping was fabricated into the equipment shelf using ScothDamp(trademark) damping film and aluminum constraining layers. Active damping was achieved using a two channel active control circuit employing QuickPack(trademark)...
Topics: ACCELERATION MEASUREMENT, INTERNATIONAL SPACE STATION, SPACE STATION PAYLOADS, MICROGRAVITY, FLUID...
It is generally assumed that an ensemble of small bodies located in similar Keplarian orbits will, because of collisions, tend to disperse into more and more dissimilar orbits. This theory was challenged. Alfven maintains that for the case where the time between collisions is longer than the orbit period and the collisions are essentially inelastic the orbits and velocities will become more similar. This gives rise to the concepts of negative diffusion and jet streams. It is proposed that this...
Topics: NASA Technical Reports Server (NTRS), PARTICLE COLLISIONS, PARTICLE TRAJECTORIES, SPACE STATION...
389
389
Sep 20, 2010
09/10
by
Quinn, Robert D.; Olinger, Frank V
texts
eye 389
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Turbulent skin friction and heat transfer coefficients were measured simultaneously on a test panel installed on the sharp leading edge upper vertical tail of the X-15 airplane at wall to recovery temperature ratios of 0.218 to 0.333 and at a nominal free stream Reynolds number of 1.54 x 10(exp 6) per foot. The data were obtained from one flight at a nominal free stream Mach number of 5.25. Reynolds analogy factors were derived from skin friction and heat transfer measurements. The measured...
Topics: COMPUTER SYSTEMS DESIGN, WORKSTATIONS, PROJECT PLANNING, SIMULATION, SPACE STATION FREEDOM, SPACE...
215
215
Jul 25, 2010
07/10
by
Fainter, R. G.; Lindquist, T. E
texts
eye 215
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The applications for which Ada was developed require distributed implementations of the language and extensive use of tasking facilities. Debugging and testing technology as it applies to parallel features of languages currently falls short of needs. Thus, the development of embedded systems using Ada pose special challenges to the software engineer. Techniques for distributing Ada programs, support for simulating distributed target machines, testing facilities for tasked programs, and...
Topics: CORIOLIS EFFECT, STRUCTURAL DESIGN CRITERIA, EXPERIMENT DESIGN, GRAVITATIONAL EFFECTS, PLANETOLOGY,...
With the completion of the International Space Station imminent, there are many opportunities for scientific experiments. There are also constraints that must be understood. This viewgraph presentation reviews some of the opportunities will be available and constraints that must be imposed. The scientist designing the experiments for the ISS, must understand and consider these factors and plan the design to minimize the impact of these constraints.
Topics: NASA Technical Reports Server (NTRS), INTERNATIONAL SPACE STATION, SPACEBORNE EXPERIMENTS, SPACE...
370
370
Sep 20, 2010
09/10
by
Smith, Marcie; Hibble, William; Wolke, Patrick J
texts
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The astrometric telescope facility (ATF), a 20-meter telescope designed for long-term detection and observation of planetary systems outside of the solar system, is scheduled to be a major user of the Space Station's payload pointing system (PPS) capabilities. However, because the ATF has such a stringent pointing stability specification (as low as 0.01 arcsec error over the frequency range from 5 to 200 hertz) and requires /- 180-degree roll rotation around the telescope's line of sight, the...
Topics: FLUID DYNAMICS, SPACE STATION PAYLOADS, MICROGRAVITY, SPACE STATION FREEDOM, SPACE STATIONS,...
Innumerable efforts were made to understand the cratering process and its ramifications in terms of planetary observations, during which the experiments both were devoted in many cases to unraveling the contribution of gravitational acceleration to cratering mechanisms. Included among these are the explosion experiments in low-gravity aircraft, the drop-platform experiments, and the high-g centrifuge experiments. Considerable insight into the effects of gravity, among other factors, was gained....
Topics: NASA Technical Reports Server (NTRS), CRATERING, GRAVITATIONAL EFFECTS, IMPACT, MICROGRAVITY,...
137
137
Aug 1, 2010
08/10
by
Warren, Wayne H., Jr
texts
eye 137
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The machine-readable version of the catalog, as it is currently being distributed from the Astronomical Data Center, is described. The catalog contains accurate equatorial coordinates for 4983 stars in a band of sky against which cameras of the Voyager spacecraft were pointed for observations in the region of Jupiter during the flyby. All of the reference stars are in the range 6 hr 00 min to 8 hr 04 min in right ascension (1950), declination zones 16 to 23 degrees, and 8 hr to 31 min to 8 hr...
Topics: ATTITUDE CONTROL, SOLAR RADIATION, SYSTEMS INTEGRATION, GRAVITATION, MICROGRAVITY, SPACE STATION...
254
254
Sep 20, 2010
09/10
by
Davis, W. S.; Eudell, A. H.; Kulp, L. S.; Lindrose, L. A.; Harman, R. R
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eye 254
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The Arthur Holly Compton Gamma Ray Observatory (GRO) was launched by the shuttle Atlantis in April 1991. This paper presents the results of the attitude sensor calibration that was performed during the early mission. The GSFC Flight Dynamics Facility (FDF) performed an alignment calibration of the two fixed-head star trackers (FHST's) and two fine Sun sensors (FSS's) on board Compton GRO. The results show a 27-arcsecond shift between the bore sights of the FHST's with respect to prelaunch...
Topics: AEROSPACE SAFETY, SAFETY FACTORS, DESIGN ANALYSIS, FURNACES, SAFETY MANAGEMENT, SPACE STATION...
No abstract available
Topics: NASA Technical Reports Server (NTRS), SPACE STATION PAYLOADS, SUPERHIGH FREQUENCIES, COMMUNICATION...
249
249
Sep 20, 2010
09/10
by
Isaksen, Ivar S. A.; Oppenheimer, Michael, et al; Fuglestvedt, J. A.; Lee, Yuan-Pern; Johnson, Colin; Atkinson, Roger; Lelieveld, Joseph; Sidebottom, Howard; Thompson, Anne; Brune, William H.
texts
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Three aspects of tropospheric chemical processes imposed by manmade emission of source gases will be discussed. First, the implications for the OH distribution and thereby for the lifetime of source gases which are controlled by reactions with OH in the troposphere (e.g., CH4 and HCFC) are investigated. This is of importance for stratosphere ozone and climate. Second, we will study the impact of source gas emission on tropospheric ozone and discuss the possibility to estimate indirect climate...
Topics: SATELLITE-BORNE INSTRUMENTS, SPACE EXPLORATION, SPACE SHUTTLE PAYLOADS, SPACE STATION PAYLOADS,...
The Materials Processing Sciences Glovebox is a rack mounted workstation which allows on orbit sample preparation and characterization of specimens from various experiment facilities. It provides an isolated safe, clean, and sterile environment for the crew member to work with potentially hazardous materials. It has to handle a range of chemicals broader than even PMMS. The theme is that the Space Station Laboratory experiment preparation and characterization operations provide the fundamental...
Topics: NASA Technical Reports Server (NTRS), DESIGN ANALYSIS, MATERIALS HANDLING, RACKS, SPACE STATION...
The promise of microgravity combustion research is introduced by way of a brief survey of results, the available set of reduced gravity facilities, and plans for experimental capabilities in the Space Station era. The study of fundamental combustion processes in a microgravity environment is a relatively new scientific endeavor. A few simple, precursor experiments were conducted in the early 1970's. Today the advent of the U.S. space shuttle and the anticipation of the Space Station Freedom...
Topics: NASA Technical Reports Server (NTRS), COMBUSTION PHYSICS, EXPERIMENT DESIGN, FLAMMABILITY,...
The purpose of two workshops was to identify and discuss experiments in cosmochemistry that cannot be conducted under the conditions available in terrestrial laboratories, but may be carried out successfully in the proposed Space Station. The scientific discussions focused on two general areas of research: chemical and physical processes in the earliest history of the general areas of research, and general principles of magmatic process applicable both to planetary formation and evolution, as...
Topics: NASA Technical Reports Server (NTRS), CONFERENCES, COSMOCHEMISTRY, PLANETARY EVOLUTION, SOLAR...
In many planning and scheduling environments, it is desirable to be able to view and manipulate plans at different levels of abstraction, allowing the users the option of viewing and manipulating either a very detailed representation of the plan or a high-level more abstract version of the plan. Generating a detailed plan from a more abstract plan requires domain-specific planning/scheduling knowledge; the reverse process of generating a high-level plan from a detailed plan Reverse Plan...
Topics: NASA Technical Reports Server (NTRS), HIERARCHIES, MISSION PLANNING, SCHEDULING, SPACE STATION...
312
312
Sep 20, 2010
09/10
by
Miklus, Kenneth J.; Kissh, Frank; Flynn, David J
texts
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Algorithms that reject transient signals due to proton effects on charge coupled device (CCD) sensors have been implemented in the HDOS ASTRA-l Star Trackers to be flown on the TOPEX mission scheduled for launch in July 1992. A unique technique for simulating a proton-rich environment to test trackers is described, as well as the test results obtained. Solar flares or an orbit that passes through the South Atlantic Anomaly can subject the vehicle to very high proton flux levels. There are three...
Topics: COST ESTIMATES, PROJECT MANAGEMENT, FURNACES, SPACE PROCESSING, SPACE STATION FREEDOM, SPACE...
299
299
Jun 26, 2011
06/11
by
NON
texts
eye 299
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An article of manufacture having improved high temperature oxidation and corrosion resistance comprising: (a) a superalloy substrate containing a carbide reinforcing phase, and (b) a coating consisting of chromium, aluminum, carbon, at least one element selected from iron, cobalt or nickel, and optionally an element selected from yttrium or the rare earth elements.
Topics: HUMAN FACTORS ENGINEERING, INTERNATIONAL SPACE STATION, SPACE STATION PAYLOADS, SYSTEMS...
337
337
May 23, 2011
05/11
by
Menkara, H. M.; Wagner, B. K.; Summers, C. J
texts
eye 337
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The purpose of this study is to use both theoretical and experimental evidence to determine the impact of doping imbalance and symmetry on the physical and electrical characteristics of doped multiple quantum well avalanche photodiodes (APD). Theoretical models have been developed to calculate the electric field valence and conduction bands, capacitance-voltage (CV), and carrier concentration versus depletion depth profiles. The models showed a strong correlation between the p- and n-doping...
Topics: IMAGING TECHNIQUES, REFLECTORS, ARRAYS, SPACE STATION PAYLOADS, X RAY TELESCOPES, SPACE STATION...
This report provides an assessment of the status of the Centrifuge Facility being developed by ARC for flight on the International Space Station Alpha. The assessment includes technical status, schedules, budgets, project management, performance of facility relative to science requirements, and identifies risks and issues that need to be considered in future development activities.
Topics: NASA Technical Reports Server (NTRS), CENTRIFUGES, LIFE SCIENCES, SPACE STATION PAYLOADS, SPACE...
267
267
Sep 20, 2010
09/10
by
Gevarter, William B
texts
eye 267
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The results of the first stage of a research effort to develop a 'sophisticated' computer model of human cognitive behavior are described. Most human decision making is an experience-based, relatively straight-forward, largely automatic response to internal goals and drives, utilizing cues and opportunities perceived from the current environment. The development of the architecture and computer program (MoCog1) associated with such 'recognition-primed' decision making is discussed. The...
Topics: PAYLOAD CONTROL, ROLL, SLEWING, POINTING CONTROL SYSTEMS, SPACE STATION PAYLOADS, SPACEBORNE...
No abstract available
Topics: NASA Technical Reports Server (NTRS), INTERNATIONAL SPACE STATION, SPACE SHUTTLE PAYLOADS, SPACE...
This document reviews certain issues in relationship to the operation of the Space Station Freedom. The document is in outline format and includes some organizational hierarchy charts, pert charts and decision charts.
Topics: NASA Technical Reports Server (NTRS), SPACE STATION FREEDOM, SPACE STATION PAYLOADS, SPACE STATION...
The text of a short speech describing the European plans for utilization of Space Station Freedom is presented. In particular, the capabilities and utilization of the Columbus module are discussed.
Topics: NASA Technical Reports Server (NTRS), COLUMBUS SPACE STATION, EUROPEAN SPACE PROGRAMS, SPACE...
No abstract available
Topics: NASA Technical Reports Server (NTRS), NEUTRON STARS, STELLAR COMPOSITION, SPACE STATION PAYLOADS, X...
529
529
Sep 20, 2010
09/10
by
Oza, D. H.; Jones, T. L.; Hakimi, M.; Samii, Mina V.; Doll, C. E.; Mistretta, G. D.; Hart, R. C
texts
eye 529
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The Goddard Space Flight Center (GSFC) Flight Dynamics Division (FDD) commissioned Applied Technology Associates, Incorporated, to develop the Real-Time Orbit Determination/Enhanced (RTOD/E) system on a Disk Operating System (DOS)-based personal computer (PC) as a prototype system for sequential orbit determination of spacecraft. This paper presents the results of a study to compare the orbit determination accuracy for a Tracking and Data Relay Satellite System (TDRSS) user spacecraft,...
Topics: NASA SPACE PROGRAMS, SOUNDING ROCKETS, SATELLITE-BORNE INSTRUMENTS, SPACE EXPLORATION, SPACE...
2,222
2.2K
May 28, 2011
05/11
by
NON
texts
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The Air Transport Research Group of the WCTR Society was formally launched as a special interest group at the 7h Triennial WCTR in Sydney, Australia in 1995. Since then, our membership base has expanded rapidly, and now includes over 400 active transportation researchers, policy-makers, industry executives, major corporations and research institutes from 28 countries. It became a tradition that the ATRG would hold an international conference at least once a year. In 1998, the ATRG organized a...
Topics: MICROGRAVITY, BIOTECHNOLOGY, PROTEIN CRYSTAL GROWTH, INTERNATIONAL SPACE STATION, SPACELAB, IMAGING...
Identification of specific areas for the technology development; payload/facility requirements; crew safety as the highest priority for the space station; identification of preliminary operational constraints (facilities/experiments requiring specialized equipment and/or procedures, and crew limitations and protective gear requirements); frame of reference of baseline of applicable waste handling experience; use of the workshop as a basis for assessing the current and applicable space station...
Topics: NASA Technical Reports Server (NTRS), EXPERIMENT DESIGN, MATERIALS HANDLING, REACTIVITY,...
Conceptual designs and programmatics of the space station accommodations for the Life Sciences Research Facilities (LSRF) are presented. The animal ECLSS system for the LSRF provides temperature-humidity control, air circulation, and life support functions for experimental subjects. Three ECLSS were studied. All configurations presented satisfy the science requirements for: animal holding facilities with bioisolation; facilities interchangeable to hold rodents, small primates, and plants;...
Topics: NASA Technical Reports Server (NTRS), LIFE SCIENCES, MISSION PLANNING, RESEARCH FACILITIES, SPACE...
The International Space Station is being developed by NASA and international partners as a versatile user platform to allow long term on-orbit investigations of a variety of scientific and technology arenas. In particular, scientific studies are planned within a research class known as microgravity science in areas such as biotechnology, combustion, fluid physics, and materials sciences. An acceleration measurement system is in development to aid such research conducted in the on-orbit...
Topics: NASA Technical Reports Server (NTRS), ACCELERATION MEASUREMENT, INTERNATIONAL SPACE STATION, SPACE...
542
542
May 28, 2011
05/11
by
MacNeice, Peter; Olson, Kevin M.; Mobarry, Clark; deFainchtein, Rosalinda; Packer, Charle
texts
eye 542
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In this paper, we describe a community toolkit which is designed to provide parallel support with adaptive mesh capability for a large and important class of computational models, those using structured, logically cartesian meshes. The package of Fortran 90 subroutines, called PARAMESH, is designed to provide an application developer with an easy route to extend an existing serial code which uses a logically cartesian structured mesh into a parallel code with adaptive mesh refinement....
Topics: BRIDGMAN METHOD, SEMICONDUCTORS (MATERIALS), METALLOIDS, METALS, ALLOYS, DIRECTIONAL SOLIDIFICATION...
There are many future science instruments with high performance pointing (sub microradian) requirements. To build a separate spacecraft for each payload is prohibitively expensive, especially as not all instruments need to be in space for a long duration. Putting multiple payloads on a single basebody that supplies power, communications, and orbit maintenance is cheaper, easier to service, and allows for the spacecraft bus to be reused as new instruments become available to replace old...
Topics: NASA Technical Reports Server (NTRS), ISOLATION, MAINTENANCE, SPACE STATION PAYLOADS, STRUCTURAL...
As the overall manager and integrator of International Space Station (ISS) science payloads, the Payload Operations Integration Center (POIC) at Marshall Space Flight Center has a critical need to provide an information management system for exchange and control of ISS payload files as well as to coordinate ISS payload related operational changes. The POIC's information management system has a fundamental requirement to provide secure operational access not only to users physically located at...
Topics: NASA Technical Reports Server (NTRS), INFORMATION MANAGEMENT, PAYLOAD INTEGRATION, SPACE STATION...
Since the publication of the final report of the science study group in October 1984 on the Solar Terrestrial Observatory (STO), its science goals and objectives have been clearly defined and a conceptual design and analysis was carried out by MSFC/NASA. Plans for the possible placing of the STO aboard the Space Station were made. A series of meetings for the STO science study group were held to review the instruments to be placed on the initial STO at Space Station IOC, and the placement of...
Topics: NASA Technical Reports Server (NTRS), SOLAR OBSERVATORIES, SOLAR TERRESTRIAL INTERACTIONS, SPACE...
610
610
May 22, 2011
05/11
by
NON
texts
eye 610
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Long term storage of subcritical cryogens in space must address the problem of thermal stratification in the storage tanks, liquid acquisition devices, and associated feed systems. Due to the absence of gravity induced body forces, thermal stratification in zero-g is more severe than commonly experienced in a one-g environment. If left uncontrolled, the thermal gradients result in excessive tank pressure rise and the formation of undesirable liquid/vapor mixtures within the liquid bulk, liquid...
Topics: MISSION PLANNING, PROTEIN CRYSTAL GROWTH, SPACE LABORATORIES, SPACE PROCESSING, SPACE STATION...
176
176
Sep 20, 2010
09/10
by
Sedler, J
texts
eye 176
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Since its launch on November 18, 1989, the Earth sensors on the Cosmic Background Explorer (COBE) have shown much greater noise than expected. The problem was traced to an error in Earth horizon acquisition-of-signal (AOS) times. Due to this error, the AOS timing correction was ignored, causing Earth sensor split-to-index (SI) angles to be incorrectly time-tagged to minor frame synchronization times. Resulting Earth sensor residuals, based on gyro-propagated fine attitude solutions, were as...
Topics: FURNACES, MISSION PLANNING, SPACECRAFT DESIGN, SUPPORT SYSTEMS, SPACE PROCESSING, SPACE STATION...
The Space Station Furnace Facility (SSFF) is an advanced facility for materials research in the microgravity environment of the Space Station Freedom and will consist of Core equipment and various sets of Furnace Module (FM) equipment in a three-rack configuration. This Project Implementation Plan (PIP) document was developed to satisfy the requirements of Data Requirement Number 4 for the SSFF study (Phase B). This PIP shall address the planning of the activities required to perform the...
Topics: NASA Technical Reports Server (NTRS), FURNACES, MATERIALS SCIENCE, MICROGRAVITY, PROJECT...
The evolution and enhancement of the International Space Station (ISS) is currently being planned in conjunction with the on-orbit construction of the baseline configuration. Three principal areas have been identified that will contribute to the evolution of ISS: Pre-Planned Program Improvement (P3I), Utilization & Commercialization, and Human Exploration and Development of Space (HEDS) missions. The ISS Evolution Strategy, under development by the Spacecraft and Sensors Branch of NASA...
Topics: NASA Technical Reports Server (NTRS), INTERNATIONAL SPACE STATION, SPACE STATION PAYLOADS, SPACE...
The Space Station, projected for construction in the early 1990s, will be an orbiting, low-gravity, permanently manned facility providing unprecedented opportunities for scientific research. Facilities for Life Sciences research will include a pressurized research laboratory, attached payloads, and platforms which will allow investigators to perform experiments in the crucial areas of Space Medicine, Space Biology, Exobiology, Biospherics and Controlled Ecological Life Support System (CELSS)....
Topics: NASA Technical Reports Server (NTRS), LIFE SCIENCES, RESEARCH MANAGEMENT, SPACE SHUTTLE PAYLOADS,...
The presentation provides an overview of the current SSFP attached payload accommodations on the U.S. truss. The overview includes discussions on the four attach sites, the power architecture, thermal control, DMS provisions, and the mechanical attach mechanism. The presentation concludes with a description of a McDonnell Douglas concept for an attached payload pallet designed to take advantage of the four sites and existing SSF hardware. This presentation should provide the payload community...
Topics: NASA Technical Reports Server (NTRS), PAYLOAD INTEGRATION, SPACE STATION FREEDOM, SPACE STATION...
954
954
Jul 26, 2010
07/10
by
Mcguire, Saundra Y
texts
eye 954
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The Alabama A and M University Elementary and Middle School Science Improvement Project (Project SIP) was instituted to improve the science knowledge of elementary and middle school teachers using the experimental or hands-on approach. Summer workshops were conducted during the summers of 1986, 1987, and 1988 in the areas of biology, chemistry, physics, and electricity, and magnetism. Additionally, a manual containing 43 lessons which included background information, experiments and activities...
Topics: BUOYANCY, REACTION KINETICS, RESEARCH FACILITIES, SPACE COMMERCIALIZATION, COMBUSTION PHYSICS,...
NASA's ISS and Spacecraft Processing Directorate (UB) is charged with the performance of payload development for research originating through NASA, ISS international partners, and the National Laboratory. The Payload Development sector of the Directorate takes biological research approved for on orbit experimentation from its infancy stage and finds a way to integrate and implement that research into a payload on either a Shuttle sortie or Space Station increment. From solicitation and...
Topics: NASA Technical Reports Server (NTRS), GROUND BASED CONTROL, SPACE SHUTTLE PAYLOADS, SPACE STATION...
NASA's Space Station Freedom Program (SSFP) planning efforts have identified a need for a payload training simulator system to serve as both a training facility and as a demonstrator to validate operational concepts. The envisioned MSFC Payload Training Complex (PTC) required to meet this need will train the Space Station payload scientists, station scientists and ground controllers to operate the wide variety of experiments that will be onboard the Space Station Freedom. The Simulation...
Topics: NASA Technical Reports Server (NTRS), COMPUTER SYSTEMS DESIGN, PROJECT PLANNING, SIMULATION, SPACE...
The Office of Space Science and Applications (OSSA) Goals are: (1) to advance scientific knowledge of the Earth, the Solar System, and the Universe; (2) to understand the effects of the space environment on biological and physical processes; and (3) to expand the human presence beyond the Earth into the Solar System. The topics covered are presented in view graph form and include the following: (1) a strategic plan; (2) evolving U.S. space science capabilities; (3) life science goals; (4) OSSA...
Topics: NASA Technical Reports Server (NTRS), AEROSPACE SCIENCES, LIFE SCIENCES, MICROGRAVITY, MICROGRAVITY...
Viewgraphs on optical disk technology - spaceflight optical disk recorder (SODR) are presented. Topics covered include: SODR; key technologies; disk drive; and system concept.
Topics: NASA Technical Reports Server (NTRS), DATA MANAGEMENT, DATA RECORDING, OPTICAL DISKS, RECORDING...
The workshop explored four major areas of concern to solar-terrestrial science. Looking across the discipline reports given previously, it is possible to find common threads that can contribute to the development of NASA's programmatic strategy for the solar-terrestrial sciences. The following areas are outlined: scientific balance; previously gathered information; imaging; impact of the space station and related platforms; vitality and relevance; and future studies.
Topics: NASA Technical Reports Server (NTRS), MISSION PLANNING, NASA PROGRAMS, SOLAR TERRESTRIAL...
Since the wind tunnel proposed to be used for the Space Station Planetology Experiments are of a rather limited size, some experience and techniques used for saltation experiments in a small linear wind tunnel may be of interest. Three experiences are presented. The first concerns a length effect of saltation mass flux in which the size of the wind tunnel exaggerates the physical process taking place. A second experience concerns a non-optical technique that does not interfere with flow and by...
Topics: NASA Technical Reports Server (NTRS), MOMENTUM, PLANETOLOGY, SPACE STATION PAYLOADS, WIND TUNNELS,...
A natural extension of the type of gas-mineral-melt condensation experiments is to study the gas-mineral-melt reaction process by controlling the reaction times of appropriate gas compositions with silicate materials. In a condensing and vaporizing gas-solid system, important processes that could influence the composition of and speciation in the gas phase are the kinetics of vaporization of components from silicate crystals and melts. The high vacuum attainable in the space station would...
Topics: NASA Technical Reports Server (NTRS), CONDENSING, KINETICS, MELTS (CRYSTAL GROWTH), MINERALS,...
Space Station Freedom will accommodate researchers with interests in science, technology and commercial applications. NASA sponsors will be responsible for selecting the U.S. researchers for Space Station Freedom. The four NASA sponsors are: Office of Space Science and Applications (OSSA), Office of Aeronautics and Space Technology (OAST), Office of Commercial Programs (OCP), and the Office of Space Flight (OSF). The areas of research responsibility for each sponsor are presented. The...
Topics: NASA Technical Reports Server (NTRS), AEROSPACE ENGINEERING, MISSION PLANNING, PAYLOAD INTEGRATION,...
A Preliminary Safety Analysis (PSA) is being accomplished as part of the Space Station Furnace Facility (SSFF) contract. This analysis is intended to support SSFF activities by analyzing concepts and designs as they mature to develop essential safety requirements for inclusion in the appropriate specifications, and designs, as early as possible. In addition, the analysis identifies significant safety concerns that may warrant specific trade studies or design definition, etc. The analysis...
Topics: NASA Technical Reports Server (NTRS), AEROSPACE SAFETY, DESIGN ANALYSIS, FURNACES, SAFETY...
