294
294
Jun 26, 2011
06/11
by
Oswald, Fred B.; Jett, Timothy R.; Predmore, Roamer E.; Zaretsky, Erwin V
texts
eye 294
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A probabilistic analysis, using the 2-parameter Weibull-Johnson method, was performed on experimental life test data from space shuttle actuator bearings. Experiments were performed on a test rig under simulated conditions to determine the life and failure mechanism of the grease lubricated bearings that support the input shaft of the space shuttle body flap actuators. The failure mechanism was wear that can cause loss of bearing preload. These tests established life and reliability data for...
Topics: LINEAR ARRAYS, RADIANT FLUX DENSITY, SENSORS, PATENTS
211
211
May 27, 2011
05/11
by
Hubbard, Harvey H
texts
eye 211
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The nature of the noise-exposure problem for humans and the aircraft-structural-damage problem is each discussed briefly. Some discussion is directed toward available methods of minimizing the effects of noise on ground crews, on the aircraft structure, and on the surrounding community. A bibliography of available papers relating to noise-reduction devices is also included.
Topics: AUTOIONIZATION, LINE SPECTRA, IONIZATION, STAR CLUSTERS, RADIANT FLUX DENSITY
257
257
May 23, 2011
05/11
by
Lewis, Robert Michae
texts
eye 257
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We discuss the numerical computation of sensitivities via the adjoint approach in optimization problems governed by differential equations. We focus on the adjoint problem in its weak form. We show how one can avoid some of the problems with the adjoint approach, such as deriving suitable boundary conditions for the adjoint equation. We discuss the convergence of numerical approximations of the costate computed via the weak form of the adjoint problem and show the significance for the discrete...
Topics: GAMMA RAY BURSTS, STRATOSPHERE, LIGHTNING, GEOMAGNETISM, COSMIC X RAYS, RADIANT FLUX DENSITY
275
275
Jun 21, 2010
06/10
by
Barthlome, D. E
texts
eye 275
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Equipotential space suits utilizing mechanical aids to minimize astronaut energy at bending joints
Topics: COSMOS SATELLITES, RADIATION DISTRIBUTION, STATISTICAL DISTRIBUTIONS, CORRELATION, RADIANT FLUX...
710
710
Jul 6, 2010
07/10
by
Rogers, J. G
texts
eye 710
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The major conclusion of the detailed examination of the human factors engineering design standard is that it is unsuitable for future spacecraft design. The standard, published in 1966, was not intended to be a zero or reduced gravity standard and was directed primarily toward ground support equipment and technology. Futhermore, ambiguities, conflicts, and unenforceable requirements contribute to the difficulty. The role of man in future space missions and its impact on human engineering...
Topics: METEOROIDS, RADIANT FLUX DENSITY, SPECTROGRAMS, COSMIC GASES, METEOR TRAILS, NITROGEN ATOMS,...
603
603
Jul 9, 2010
07/10
by
MORISSET, J
texts
eye 603
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PRELIMINARY SOVIET DATA AND ACCURATE FRENCH-ENGLISH FLIGHT DATA ARE USED TO COMPARE THE PERFORMANCES OF THE CONCORDE AND THE TU-144 IN THE FOLLOWING AREAS: FLIGHT PROFILES, TAKEOFF WEIGHT, RANGE, PAYLOAD CAPABILITY, TAKEOFF AND LANDING DISTANCES.
Topics: INFRARED RADIATION, RADIANT FLUX DENSITY, TERRESTRIAL RADIATION, HISTOGRAMS, INFRARED SPECTRA,...
Radiant energy is converted into electric energy by irradiating a capacitor including an ionic dielectric. The dielectric is a sintered crystal superionic conductor, e.g., lanthanum trifluoride, lanthanum trichloride, or silver bromide, so that a multiplicity of crystallites exist between electrodes of the capacitor. The radiant energy cyclically irradiates the dielectric so that the dielectric exhibits a cyclic photocapacitive like effect. Adjacent crystallites have abutting surfaces that...
Topics: NASA Technical Reports Server (NTRS), CAPACITORS, DIELECTRICS, RADIANT FLUX DENSITY, PATENTS, Sher,...
On Apollo missions, the Lunar Module sewed as home and operating base for astronauts exploring the lunar surface. Since the moon has no layer of atmosphere to filter the sun's rays, the Lunar Module was exposed to extremely high daylight temperatures. To help cool the spacecraft, NASA employed a protective exterior coating capable of casting off, rather than absorbing, the sun's radiant energy. NASA selected an existing high temperature coating called Pyromark and asked the manufacturer to...
Topics: NASA Technical Reports Server (NTRS), HEATERS, RADIANT FLUX DENSITY, PROTECTIVE COATINGS, LUNAR...
202
202
Jul 6, 2010
07/10
by
MUSIY, V. I.; SHESTAKA, I. S
texts
eye 202
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AN EVALUATION WAS MADE OF THE MASS OF INDIVIDUAL FRAGMENTS, THE FRAGMENTATION TIME, AND CERTAIN PARAMETERS REQUIRED FOR PLOTTING THEORETICAL CURVES OF METEOR FLARE BRIGHTNESS. THE BRIGHTNESS CURVES OBTAINED FOR METEORS FRAGMENTING AT A CONSTANT RATE OVER A CERTAIN RANGE OF ALTITUDES (FROM THE COMMENCEMENT TO THE MAXIMUM BRIGHTNESS OF A FLARE) ARE COMPARED WITH METEOR PHOTOGRAPHS OBTAINED AT THE ODESSA OBSERVATORY.
Topics: ELECTRON EMISSION, ELECTRON TRANSITIONS, MAGNETIC FIELDS, QUANTUM THEORY, RADIANT FLUX DENSITY,...
199
199
Jun 1, 2010
06/10
by
Nesterov, V. E.; Pisarenko, N. F.; Savenko, I. A.; Shavrin, P. I.; Vernov, S. N
texts
eye 199
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Radiation intensity distribution in radiation belt of earth measured by scintillation counter in orbiting spacecraft
Topics: RADIANT FLUX DENSITY, RADIATION BELTS, SCINTILLATION COUNTERS, TERRESTRIAL RADIATION, RADIATION...
1,163
1.2K
Jul 5, 2010
07/10
by
Cannon, W. A.; English, W. D.; Robson, J. H
texts
eye 1,163
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comment 0
No Abstract Available
Topics: CORPUSCULAR RADIATION, COSMIC RAYS, MAGNETIC STORMS, RADIANT FLUX DENSITY, AURORAS, DIURNAL...
A radiant energy angle sensor is provided wherein the sensitive portion thereof comprises a pair of linear array detectors with each detector mounted normal to the other to provide X and Y channels and a pair of slits spaced from the pair of linear arrays with each of the slits positioned normal to its associated linear array. There is also provided electrical circuit means connected to the pair of linear array detectors and to separate X and Y axes outputs.
Topics: NASA Technical Reports Server (NTRS), LINEAR ARRAYS, RADIANT FLUX DENSITY, SENSORS, PATENTS, Auer,...
185
185
Jul 5, 2010
07/10
by
Zaydel, A. N., et al
texts
eye 185
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comment 0
No Abstract Available
Topics: RADIATION DOSAGE, SCINTILLATION COUNTERS, SPACECRAFT ENVIRONMENTS, CHARGED PARTICLES, CHROMOSPHERE,...
192
192
Jun 1, 2010
06/10
by
Galperin, B. M.; Seryakova, L. P
texts
eye 192
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Effect of shape and number of clouds and state of solar disk on intensity of scattered and total solar radiation
Topics: CLOUD COVER, RADIANT FLUX DENSITY, SHAPES, SOLAR RADIATION, SUN, CLOUD COVER, RADIATION INTENSITY,...
353
353
Jul 21, 2010
07/10
by
NON
texts
eye 353
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Phase one and two of a program to further develop and investigate advanced graphite epoxy waveguides, radiators, and components with application to space antennas are discussed. The objective of the two phases were to demonstrate mechanical integrity of a small panel of radiators and parts procured under a previous contract and to develop alternate designs and applications of the technology. Most of the emphasis was on the assembly and test of a 5 x 5 element module. This effort was supported...
Topics: ATMOSPHERIC CIRCULATION, ATMOSPHERIC MODELS, OZONE, RADIANT FLUX DENSITY, WATER VAPOR, ANNUAL...
238
238
Jul 10, 2010
07/10
by
KHALEMSKIY, E. N
texts
eye 238
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THE HYDROOPTICAL CHARACTERISTICS WHICH EXERT AN INFLUENCE ON THE COEFFICIENT OF SEA LUMINANCE ARE CONSIDERED. THESE INCLUDE THE ABSORPTION INDEX, THE INDEX OF BACKWARD REFRACTION, AS WELL AS THE CONCENTRATION OF SUSPENDED PARTICLES IN THE SEA WATER, THUS THE TRANSPARENCY OF THE WATER. THE EMPIRICAL RESULTS OF SPECTRAL DISTRIBUTION AND THE DEPENDENCE OF THE LUMINANCE COEFFICIENT ON TRANSPARENCY ARE PRESENTED.
Topics: AIR WATER INTERACTIONS, DIFFUSE RADIATION, BOUNDARY LAYERS, ISOTROPY, LIGHT SCATTERING, OCEANS,...
300
300
May 31, 2011
05/11
by
Meyn, Larry; James, Kevin; Geenen, Robert; Rizk, Yehi
texts
eye 300
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Tail Buffet measurements from the second full-scale F/A-18 wind tunnel test are presented and compared with small-scale wind tunnel measurements, recent flight test measurements, and to CFD computations. Non-dimensional power spectra for unsteady pressures at the 60%-span, 45%-chord location on the vertical tail are presented from several small-scale wind tunnel tests, from the full-scale wind tunnel tests, and from flight tests. In addition non-dimensional power spectra for unsteady fin...
Topics: LINEAR ARRAYS, THERMOPILES, EARTH RADIATION BUDGET, RADIOMETERS, ALGORITHMS, DISCRETE FUNCTIONS,...
212
212
Jun 21, 2010
06/10
by
Karras, T. J
texts
eye 212
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comment 0
Dual detection system for processing AIMP satellite pulse frequency modulated telemetry data
Topics: CALIBRATING, STANDARDS, RADIOMETERS, SOLAR RADIATION, ACCURACY, INSTRUMENT COMPENSATION, INSTRUMENT...
241
241
Jun 27, 2010
06/10
by
Sebacher, D. I.; Guy, R. W.; Lee, L. P
texts
eye 241
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Electron beam measurement of molecular vibrational energy transfer in expanding mixtures of N2 and Co2 heated by electric arc
Topics: ELECTRON TRANSITIONS, ENERGY LEVELS, LEAD ISOTOPES, MUONS, RADIANT FLUX DENSITY, CHARGE...
159
159
Jul 12, 2010
07/10
by
Radin, H. W
texts
eye 159
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comment 0
No Abstract Available
Topics: COBALT 60, FUEL GAGES, LUNAR MODULE, RADIANT FLUX DENSITY, APOLLO SPACECRAFT, APPROXIMATION, GAMMA...
Under the Guaranteed Watt Savers (GWS) system, plans for a new home are computer analyzed for anticipated heat loss and gain. Specifications are specifically designed for each structure and a Smart- House Radiant Barrier is installed. Designed to reflect away 95% of the Sun's radiant energy, the radiant barrier is an adaptation of an aluminum shield used on Apollo spacecraft. On completion of a home, technicians using a machine, check for air tightness, by creating a vacuum in the house and...
Topics: NASA Technical Reports Server (NTRS), INSULATION, RESIDENTIAL AREAS, HEAT SHIELDING, SUN, RADIANT...
287
287
Jun 9, 2011
06/11
by
Johnson, Marjory; Freeman, Kenneth; Gilstrap, Raymond; Beck, Richar
texts
eye 287
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This paper describes an experiment to prototype a new way of conducting science by applying networking and distributed computing technologies to an Earth Science application. A combination of satellite, wireless, and terrestrial networking provided geologists at a remote field site with interactive access to supercomputer facilities at two NASA centers, thus enabling them to validate and calibrate remotely sensed geological data in near-real time. This represents a fundamental shift in the way...
Topics: ANALOG TO DIGITAL CONVERTERS, RADIANT FLUX DENSITY, TELEMETRY, DATA ACQUISITION, TRMM SATELLITE,...
An optical mass gauge sensor is disclosed comprising a vessel having an interior surface which reflects radiant energy at a wavelength at least partially absorbed by a fluid contained within the vessel, an illuminating device for introducing radiant energy at such wavelength into the vessel interior, and, a detector for measuring the energy per unit area of illumination within the vessel created by the radiant energy which is not absorbed by the fluid.
Topics: NASA Technical Reports Server (NTRS), DETECTION, MEASURING INSTRUMENTS, OPTICAL MEASURING...
Measuring apparatus including a ruled member having alternate transparent and opaque zones. An optical coupler connecting the ruled member with electromagnetic radiation-conversion apparatus. The conversion apparatus may include a photomultiplier and a discriminator. Radiation impinging on the ruled member will, in part, be converted to electrical pulses which correspond to the intensity of the radiation. A method of processing electromagnetic radiation includes providing a member having...
Topics: NASA Technical Reports Server (NTRS), ELECTROMAGNETIC RADIATION, TRANSPARENCE, RADIANT FLUX...
370
370
Jun 9, 2011
06/11
by
Bhasin, Kul; Hayden, Jeffre
texts
eye 370
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comment 0
Space communications architecture concepts play a key role in the development and deployment of NASA's future exploration and science missions. Once a mission is deployed, the communication link to the user needs to provide maximum information delivery and flexibility to handle the expected large and complex data sets and to enable direct interaction with the spacecraft and experiments. In human and robotic missions, communication systems need to offer maximum reliability with robust two-way...
Topics: RADIANT FLUX DENSITY, ON-LINE SYSTEMS, STUDENTS, RAIN FORESTS, EDUCATION, VISUAL OBSERVATION, TRMM...
977
977
Jul 11, 2010
07/10
by
KAINZ, G.; SONTAG, G
texts
eye 977
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IN THE AMPEROMETRIC TITRATION OF METAL IONS WITH ETHYLENEDIAMINETETRAACETIC ACID (EDTA), AN OXIDE ELECTRODE IS EMPLOYED (A PLATINUM ELECTRODE COATED WITH AN OXIDE LAYER. THESE ELECTRODES ARE ACTIVE AND STABLE OVER A RELATIVELY WIDE RANGE OF PH AND WILL REACT TO AN EXCESS OF EDTA (AFTER THE EQUIVALENCE POINT). THE PROCEDURES ARE SPECIFIED: (1) FOR DETERMINING INDIVIDUAL METAL IONS, AND (2) FOR DETERMINING 2 IONS WHEN PRESENT TOGETHER. IN CASE (2) THE PRINCIPLE THAT THE STABILITY OF METAL-EDTA...
Topics: DRY HEAT, TEMPERATURE EFFECTS, THERMAL RESISTANCE, IONIZING RADIATION, MICROORGANISMS, PLANETARY...
221
221
Jun 17, 2010
06/10
by
Barbier, D.; Fafiotte, M.; Weill, G
texts
eye 221
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Connection between red and green lines of night sky and radiation intensities of auroral zone at high latitudes
Topics: AURORAL ZONES, RADIATION INTENSITY, AURORAS, NIGHT, NIGHT SKY, POLAR REGIONS, RADIANT FLUX DENSITY,...
433
433
Jun 21, 2010
06/10
by
Eddy, R. P
texts
eye 433
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comment 0
Design and performance of collimated beam solar simulator
Topics: INFRARED RADIATION, LUNAR COMPOSITION, MATHEMATICAL MODELS, RADIATION DISTRIBUTION, ASTRONOMICAL...
The prime focus of this effort is to advance the state of understanding of correlation between lightning strokes and gamma-ray flashes. key issue addressed was the revision of the existing models of runaway breakdown in the stratosphere due to low altitude lightning, which are related to the source of gamma-ray flashes. The revision includes the assessment of the effect due to geomagnetic field on the development of runaway discharge.
Topics: NASA Technical Reports Server (NTRS), GAMMA RAY BURSTS, STRATOSPHERE, LIGHTNING, GEOMAGNETISM,...
The purpose of this work is to develop a basis for irradiance calibration of spacebased infrared sensors. It is an extension of previous work that fully defines the context of the calibration, and the concepts of spectral composites and templates. We discuss four areas of work carried out during the past year; our accomplishments and failures; and our plans for the future. The four areas are: 1) Production and release of Version 3.0 of the Walker-Cohen Atlas of Calibrated Spectra, 2) Production...
Topics: DTIC Archive, Walker, Russell, VANGUARD RESEARCH INC SCOTTS VALLEY CA, *INFRARED DETECTORS,...
A computer program can be used to determine the radiative flux and flux divergence through a nonisothermal planar slab of gas is described. The program considers species typical of air at high temperatures and nylon or carbon phenolic ablation products. The equations solved are for a variable optical depth line and continuum gas model using species cross sections and line widths as the basic data.
Topics: NASA Technical Reports Server (NTRS), COMPUTER PROGRAMS, RADIANT FLUX DENSITY, ABLATION, HIGH...
Temporal variations in cosmic ray intensity have been deduced from observations of products of interactions of cosmic ray particles in the Moon, meteorites, and the Earth. Of particular interest is a comparison between the information based on Earth and that based on other samples. Differences are expected at least due to: (1) differences in the extent of cosmic ray modulation, and (2) changes in the geomagnetic dipole field. Any information on the global changes in the terrestrial cosmic ray...
Topics: NASA Technical Reports Server (NTRS), COSMIC RAYS, EARTH SURFACE, GEOPHYSICS, RADIOACTIVE ISOTOPES,...
Flux envelopes on an absolute energy scale from 1100 to 6000 A prepared from OAO-2 scans and from published ground-based material are presented for gamma Leporis, B0.5 5 eta Ursae Majoris, B3 5, gamma Ursae Majoris, A0 5, and alpha Lyrae, A0 5, and for alpha Canis Majoris Al 5 from rocket scans. These, with already published flux envelopes for Zeta Draconis, B6 3, and alpha Leonis, B7 5 (Underhill 1972) are intercompared and compared with reference flux envelopes predicted by LTE theory from...
Topics: NASA Technical Reports Server (NTRS), B STARS, OAO 2, RADIANT FLUX DENSITY, ULTRAVIOLET RADIATION,...
In the mid-1950s, a young U.S. Air Force engineer named Clark Beck began work with what is now one of NASA s most prolific spinoffs, the radiant barrier technology. Beck s work involved creating materials that could withstand the immense heat created by passage through the Earth s atmosphere. He was working on structures and resources that could withstand the fluctuations in temperature created by a skip reentry, where a craft would skip along the surface of the atmosphere, gradually making...
Topics: NASA Technical Reports Server (NTRS), RADIANT FLUX DENSITY, THERMAL PROTECTION, THERMAL RESISTANCE,...
217
217
Jun 20, 2010
06/10
by
Hibbard, R. R.; Liebert, C. H
texts
eye 217
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Equations, charts, and analysis to calculate theoretical temperatures of thin film solar cells in earth orbit
Topics: PLANETARY RADIATION, ZINC OXIDES, SOLAR CELLS, SURFACE TEMPERATURE, ALBEDO, CADMIUM SULFIDES, FLAT...
The cross sectional dimensions of the MHD channel in the NASA Lewis closed loop facility were reduced to 3.8 x 11.4 cm. Tests were run in this channel using a helium-cesium working fluid at stagnation pressures of 160,000 n/M2, stagnation temperatures of 2000-2060 K and an entrance Mach number of 0.36. In these tests Faraday open circuit voltages of 200 V were measured which correspond to a Faraday field of 1750 V/M. Power generation tests were run for different groups of electrode...
Topics: NASA Technical Reports Server (NTRS), CESIUM, HELIUM, MAGNETOHYDRODYNAMIC GENERATORS, CLOSED...
Ground use sensory systems are used for measuring and analyzing radiation reflected from Earth targets to discriminate among classes of visually-similar objects. The Hand Held Ratioing Radiometer is an example of a ground use device. This device is being manufactured and sold by Barringer Research Limited under a patent license. The battery-powered unit, designed for field portable use, weighs 12 pounds. An added capability of the Ratioing Radiometer is that it simultaneously analyzes radiation...
Topics: NASA Technical Reports Server (NTRS), RADIOMETERS, REMOTE SENSING, RADIATION MEASURING INSTRUMENTS,...
236
236
Jun 21, 2010
06/10
by
Kestenboym, Kh. S., et al
texts
eye 236
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Strong point explosion in exponential atmosphere without consideration of real properties of air
Topics: CROSS CORRELATION, WIND MEASUREMENT, PHOTOMETERS, PROBABILITY DENSITY FUNCTIONS, TURBULENT FLOW,...
A study of the spectra of zeta Draconis (B6 III), beta Sextantis (B6 V), and alpha Leonis (B7 V), was made from high dispersion spectrograms which cover the spectral region 3100 A to 6700 A and from OAO 2 spectral scans covering the spectral region 1100 A to 3600 A. Profiles, equivalent widths and central intensities of many lines in the spectrum of zeta Draconis are presented, as well as for the major lines of beta Sextantis. Alpha Leonis rotates too rapidly for these measurements to be made...
Topics: NASA Technical Reports Server (NTRS), B STARS, RADIANT FLUX DENSITY, STELLAR SPECTRA, OAO 2, RADII,...
Significant advancements were made in a number of areas: improved efficiency of basic receiving element at low power density levels, improved resolution and confidence in efficiency measurements mathematical modelling and computer simulation of the receiving element and the design, construction, and testing of an environmentally protected two-plane construction suitable for low cost, highly automated construction of large receiving arrays.
Topics: NASA Technical Reports Server (NTRS), MICROWAVE TRANSMISSION, MICROWAVES, SYSTEMS ENGINEERING,...
An apparatus and method are described in which the capacitance of a semiconductor junction subjected to an electromagnetic radiation field is utilized to indicate the intensity or strength of the radiation.
Topics: NASA Technical Reports Server (NTRS), ELECTROMAGNETIC RADIATION, RADIATION MEASURING INSTRUMENTS,...
A miniature, ultra-high resolution, and color scanning microscope using microchannel and solid-state technology that does not require focus adjustment. One embodiment includes a source of collimated radiant energy for illuminating a sample, a plurality of narrow angle filters comprising a microchannel structure to permit the passage of only unscattered radiant energy through the microchannels with some portion of the radiant energy entering the microchannels from the sample, a solid-state...
Topics: NASA Technical Reports Server (NTRS), MICROCHANNELS, MICROSCOPES, SCANNING, RADIANT FLUX DENSITY,...
218
218
May 21, 2011
05/11
by
Ward, John L.; Mcintire, Gerr
texts
eye 218
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The NASA Satellite Instrumentation Calibrator (NASIC) is a visible and near-infrared spectrometer used to calibrate various satellite instruments by underflying those instruments in a NASA ER-2 aircraft. The calibration instrument's hardware and software are documented. The design, operation, and function of an Ebert-Fastie monochronomator, which by means of a moveable diffraction grating, becomes a visible and near-infrared spectrometer used to calibrate satellite-borne instruments by high...
Topics: EARTH ORBITS, SILICON, SOLAR CELLS, RADIANT FLUX DENSITY, RADIATION DAMAGE, SOLAR ARRAYS, CHARGED...
The data from the world wide grid of neutron monitoring stations was analyzed for a comparative study of the phase of diurnal anisotropy on quiet and disturbed days on a long term basis up to recent period. It has been observed that the phase of the diurnal anisotropy on disturbed days where the value of the Ap-index is higher, is found to shift towards earlier hours in comparison to the phase of the diurnal anisotropy on quiet days where the value of Ap-index is lower on all the stations from...
Topics: NASA Technical Reports Server (NTRS), ANISOTROPY, ATMOSPHERIC PRESSURE, COSMIC RAYS, DIURNAL...
Tabulated values of longwave and shortwave radiation fluxes and also cooling and heating rates in the atmosphere for standard atmospheric profiles are presented. The radiation codes used in the Goddard general circulation model were employed for the computations. These results were obtained for an international intercomparison projected called Intercomparison of Radiation Codes in Climate Models (ICRCCM).
Topics: NASA Technical Reports Server (NTRS), ATMOSPHERIC CIRCULATION, ATMOSPHERIC MODELS, OZONE, RADIANT...
A technique of cosmic ray exposure age dating using cosmic ray produced I-129 and Xe-129 components is discussed. The live I-129 - Xe-129 method provides an ideal monitor for cosmic ray flux variations on the 10(7)y - 10(8)y time-scale. It is based on low-energy neutron reactions on Te, and these data, when coupled to those from other methods, may facilitate the detection of complex exposure histories.
Topics: NASA Technical Reports Server (NTRS), COSMIC RAYS, COSMOCHEMISTRY, EXPOSURE, IODINE ISOTOPES,...
224
224
Jun 12, 2011
06/11
by
Wasson, J. T
texts
eye 224
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The chondrule cooling rates used in most chondrule-formation models appear to be too low. Recent petrographic evidence indicates that the amount of crystal (especially olivine) growth that occurred after the last melting event was about 30 smaller than the grain sizes simulated in order to estimate cooling rates. The smaller amount of growth leads to an upwards revision of cooling rates by about a factor of 1000. Most chondrules are porphyritic. They consist of large and small crystals of...
Topics: CLOUDS (METEOROLOGY), SATELLITE IMAGERY, TRACKING (POSITION), REMOTE SENSING, SIMULATION, RADIANT...
227
227
Jun 21, 2010
06/10
by
Lachs, M
texts
eye 227
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Space flight effects on international relations and formulation of extraterrestrial space treaty
Topics: ATMOSPHERIC MODELS, THERMODYNAMIC EQUILIBRIUM, MATHEMATICAL MODELS, STELLAR ATMOSPHERES, BALMER...
The Wide-field Infrared Survey Explorer (WISE; Wright et al. 2010) surveyed the entire sky at 3.4, 4.6, 12 and 22 microns in 2010, achieving 5-sigma point source sensitivities per band better than 0.08, 0.11, 1 and 6 mJy in unconfused regions on the ecliptic. The WISE All-Sky Data Release, conducted on March 14, 2012, incorporates all data taken during the full cryogenic mission phase, 7 January 2010 to 6 August 20l0,that were processed with improved calibrations and reduction algorithms....
Topics: NASA Technical Reports Server (NTRS), WIDE-FIELD INFRARED SURVEY EXPLORER, SKY SURVEYS (ASTRONOMY),...
Data from Argentine balloon flights made to investigate gamma ray emission from the galactic center are summarized. Data are also summarized from a Palestine, Texas balloon flight to measure gamma rays from NP 0532 and Crab Nebulae.
Topics: NASA Technical Reports Server (NTRS), BALLOON FLIGHT, CRAB NEBULA, GALACTIC CLUSTERS, GAMMA RAYS,...
