181
181
Jun 27, 2010
06/10
by
Surdin, M. M
texts
eye 181
favorite 0
comment 0
No Abstract Available
Topics: AERIAL PHOTOGRAPHY, POLARIZED RADIATION, SOLAR CORONA, SOLAR ECLIPSES
167
167
Jun 1, 2010
06/10
by
Mustel, E. R
texts
eye 167
favorite 0
comment 0
Spatial structure of solar corona
Topics: POLARIMETRY, SOLAR CORONA, SPATIAL DISTRIBUTION, CORONA, SPATIAL DISTRIBUTION
180
180
Jul 5, 2010
07/10
by
Severnyy, A. V
texts
eye 180
favorite 0
comment 0
No Abstract Available
Topics: CHROMOSPHERE, KINEMATICS, SOLAR CORONA, SPICULES, HYDROGEN, MAGNETIC DISPERSION, SPECTROSCOPY
175
175
Jun 27, 2010
06/10
by
Gershman, V. N
texts
eye 175
favorite 0
comment 0
No Abstract Available
Topics: PHOTOMETRY, POLARIZED RADIATION, SOLAR CORONA, ASTRONOMICAL PHOTOGRAPHY, SOLAR ECLIPSES
207
207
Jun 21, 2010
06/10
by
NON
texts
eye 207
favorite 0
comment 0
No Abstract Available
Topics: ENERGY DISSIPATION, SOLAR CORONA, SOLAR MAGNETIC FIELD, DEFORMATION, MICROSTRUCTURE
300
300
Jul 11, 2010
07/10
by
FINKE, H. O.; MARTIN, R
texts
eye 300
favorite 0
comment 0
ACOUSTICAL MEASUREMENTS AND EVALUATIONS OF AIRCRAFT NOISE WERE CARRIED OUT BY A TEAM OF UNIVERSITY PERSONNEL IN WEST GERMANY IN THE FIELDS OF ACOUSTICS, MEDICINE, PSYCHOLOGY, SOCIAL SCIENCES AND OCCUPATIONAL PSYCHOLOGY. THE MUNICH, WEST GERMANY AIRPORT WAS INVESTIGATED IN 1969. INHABITANTS NEAR THE AIRPORT WERE TESTED BY MEANS OF QUESTIONNAIRES, WHICH WERE STATISTICALLY EVALUATED.
Topics: INTERPLANETARY MAGNETIC FIELDS, SOLAR CORONA, PHOTOSPHERE, POLARIZATION CHARACTERISTICS, SOLAR...
612
612
May 31, 2011
05/11
by
Cornett, Robert H
texts
eye 612
favorite 0
comment 0
This report covers software and science support activities for the Laboratory for Astronomy & Solar Physics at NASA/Goddard Space Flight Center.
Topics: HELIOSPHERE, MAGNETOHYDRODYNAMICS, SOLAR PHYSICS, SOLAR CORONA, THREE DIMENSIONAL MODELS, SUN
71
71
May 17, 2020
05/20
by
Abdzex_Kuban
texts
eye 71
favorite 0
comment 0
Physics Of The Solar Corona An Introduction With Problems And Solutions
Topic: Physics Of The Solar Corona An Introduction With Problems And Solutions
190
190
May 23, 2011
05/11
by
Glazman, Roman E
texts
eye 190
favorite 0
comment 0
Employing a recently proposed 'multi-wave interaction' theory, inertial spectra of capillary gravity waves are derived. This case is characterized by a rather high degree of nonlinearity and a complicated dispersion law. The absence of scale invariance makes this and some other problems of wave turbulence (e.g., nonlinear inertia gravity waves) intractable by small-perturbation techniques, even in the weak-turbulence limit. The analytical solution obtained in the present work for an arbitrary...
Topics: CORONAL HOLES, MAGNETOHYDRODYNAMIC FLOW, SOLAR CORONA, BOUNDARY CONDITIONS, MATHEMATICAL MODELS,...
Topics: DTIC Archive, HIGH ALTITUDE OBSERVATORY BOULDER CO, *SOLAR CORONA, THEORY, SOLAR OBSERVATORIES
Collimated ejections of plasma called coronal hole jets are commonly observed in polar coronal holes. However, such coronal jets are not only a specific features of polar coronal holes but they can also be found in coronal holes appearing at lower heliographic latitudes. In this paper we present some observations of equatorial coronal hole jets made up with data provided by the STEREO/SECCHI instruments during a period comprising March 2007 and December 2007. The jet events are selected by...
Topics: DTIC Archive, UNIVERSITY OF CALABRIA (ITALY), *PLASMA JETS, *SOLAR CORONA, SOLAR DISTURBANCES
484
484
Jul 11, 2010
07/10
by
Wenzel, L. M.; Moss, J. E., Jr.; Mehalic, C. M
texts
eye 484
favorite 0
comment 0
AJ85-GE-13 engine was equipped with a compressor case which allowed changes to the case wall over the rotor tips of six of its stages. The engine was tested with four inlet configurations: undistorted and with 180 deg circumferential, hub radial, and tip radial distortions. Baseline data defining compressor performance and stall regions were taken for these inlet configurations with solid (untreated) compressor case inserts. Circumferentially grooved inserts were installed in the first three...
Topics: AMINO ACIDS, CHEMICAL REACTIONS, EVOLUTION (DEVELOPMENT), METEORITES, CARBON MONOXIDE,...
17
17
Jul 10, 2019
07/19
by
31st ASI Meeting ASI Conference Series, 2013, Vol. 9, pp 43 – 48
texts
eye 17
favorite 0
comment 0
Aditya-1 is India’s first dedicated, low-earth dawn-dusk orbit, mission to study the Sun. The main payload on this mission is a visible emission line solar coronagraph to observe the solar corona simultaneously in the Green (Fe XIV) and Red (Fe X) emission lines over 3 solar radii (≈ 1.5 degree) field-of-view (FOV). A larger FOV (≈ 6 solar Radii; 3.0 degree) continuum channel is also added for the study of Coronal Mass Ejections (CMEs). The main scientific objectives of this mission are:...
Topics: ISRO, solar corona, coronagraph, coronal mass ejections, coronal magnetic topology, temperature,...
373
373
Jun 17, 2010
06/10
by
Perche, J. C
texts
eye 373
favorite 0
comment 0
Intensity ratio and polarization rate of forbidden spectral lines of iron XIII in solar corona
Topics: COMPUTATION, IRON, LINE SPECTRA, POLARIZATION, SOLAR CORONA, CORONA, IRON, POLARIZATION, SPECTRAL...
284
284
May 26, 2011
05/11
by
Barnes, Aaro
texts
eye 284
favorite 0
comment 0
The quadrennium 1975-1978 was a period of great advance for solar-wind studies, a period that combined exploration of new regions with increased maturity in established fields of study. The Helios, Pioneer, and Voyager spacecraft have been exploring the inner and outer regions of the solar wind. There has been a rebirth of the study of possible relations between solar variability and Earth's climate and weather, stimulated largely by Eddy's investigation of the Maunder Minimum; the solar wind...
Topics: ORBITAL RESONANCES (CELESTIAL MECHANICS), PERTURBATION, SOLAR CORONA, PROTOPLANETS, PLANETARY...
In this report we describe progress in our investigation of CMEs using magnetohydrodynamic (MHD) simulations.
Topics: NASA Technical Reports Server (NTRS), MAGNETOHYDRODYNAMICS, SOLAR CORONA, PROGRESS, SIMULATION,...
179
179
Jul 5, 2010
07/10
by
Vorobyev, G. G
texts
eye 179
favorite 0
comment 0
No Abstract Available
Topics: MAGNETIC FIELDS, SOLAR CORONA, ELECTRON DENSITY (CONCENTRATION), MAGNETIC DIFFUSION, PHOTOMETRY,...
Convective instability in the solar corona growth, especially linear growth, was studied. An investigation was also made of nonlinear instability development on a computer. The computer was used to follow a growing perturbation from a small local enhancement in the density of the solar wind to a large increase in the density which would look like one of the rays seen in the sun's corona.
Topics: NASA Technical Reports Server (NTRS), MAGNETIC STARS, PERTURBATION, SOLAR CORONA, COMPUTER...
485
485
May 30, 2011
05/11
by
Morgan, Dwayne R.; Streich, Ron G.; Bull, Barton; Grant, Chuc
texts
eye 485
favorite 0
comment 0
The advent of low earth orbit (LEO) commercial communication satellites provides an opportunity to dramatically reduce Telemetry, Tracking and Control (TT&C) costs of launch vehicles, Unpiloted Aerial Vehicles (UAVs), Research Balloons and spacecraft by reducing or eliminating ground infrastructure. Personnel from the Goddard Space Flight Center's Wallops Flight Facility (GSFC\WFF) have successfully used commercial Geostationary Earth Orbit (GEO) and Big LEO communications satellites for...
Topics: ATMOSPHERIC TEMPERATURE, SOLAR CORONA, SOLAR PHYSICS, SOLAR WIND VELOCITY, WIND EFFECTS, FIBER...
320
320
Jul 11, 2010
07/10
by
MORISSET, J
texts
eye 320
favorite 0
comment 0
THE CFM-56 BYPASS TURBOJET ENGINE IS DESCRIBED. THE DESIGN OFFERS ADVANTAGES OF HIGH BYPASS RATIO AND AN ADVANCED CORE ENGINE COMPRISING A SINGLE-STAGE BLOWER AND COMPRESSOR. PERFORMANCE DATA ON THE CORE-ENGINE COMPONENTS, WITH OVER 6000 TEST HOURS, ARE GIVEN. FOREIGN BODY INGESTION TESTS, AERODYNAMIC NOISE TESTS, AND CROSSWIND AND TAILWIND PERFORMANCE TESTS ARE DISCUSSED.
Topics: APOLLO SOYUZ TEST PROJECT, ENVIRONMENT SIMULATION, EXPERIMENTATION, SOLAR ECLIPSES, CORONAGRAPHS,...
1,131
1.1K
May 28, 2011
05/11
by
Platt, R
texts
eye 1,131
favorite 0
comment 0
This is the Performance Verification Report, Initial Comprehensive Performance Test Report, P/N 1331200-2-IT, S/N 105/A2, for the Integrated Advanced Microwave Sounding Unit-A (AMSU-A). The specification establishes the requirements for the Comprehensive Performance Test (CPT) and Limited Performance Test (LPT) of the Advanced Microwave Sounding, Unit-A2 (AMSU-A2), referred to herein as the unit. The unit is defined on Drawing 1331200. 1.2 Test procedure sequence. The sequence in which the...
Topics: STELLAR EVOLUTION, TOPOLOGY, CORONAL MASS EJECTION, SOLAR CORONA, SOLAR WIND, MAGNETOHYDRODYNAMICS,...
A philosophy for planetary geoscience is presented to aid in addressing a number of major scientific questions; answers to these questions should constitute the basic geoscientific knowledge of the solar system. However, any compilation of major questions or basic knowledge in planetary geoscience involves compromises and somewhat arbitrary boundaries that reflect the prevalent level of understanding at the time.
Topics: NASA Technical Reports Server (NTRS), CELESTIAL BODIES, PHILOSOPHY, PLANETOLOGY, COSMOLOGY,...
199
199
Jul 11, 2010
07/10
by
SCHLOTTMANN, F
texts
eye 199
favorite 0
comment 0
THE AERODYNAMIC FORCES ACTING UPON SLENDER WING CONFIGURATIONS IN ROLL WERE MEASURED IN A LOW-SPEED WIND TUNNEL IN ORDER TO DETERMINE THE INFLUENCE OF VARIATION OF THE ANGLE OF ATTACK AND ROLL ANGULAR VELOCITY. IT WAS SHOWN, FOR THE DELTA- AND SQUARE-WING MODELS INVESTIGATED, THAT A NONLINEAR RELATIONSHIP EXISTS BETWEEN ROLLING MOMENT AND ROLL ANGULAR VELOCITY, AND RELATIONSHIP BETWEEN ROLL DAMPING AND ANGLE OF ATTACK. THE REASON FOR THIS IS THE PRESENCE OF THE LEADING-EDGE SEPARATION TOGETHER...
Topics: ANISOTROPIC MEDIA, PLASMA DYNAMICS, WAVE INTERACTION, INVERSIONS, LINEAR PREDICTION,...
This report covers technical progress during the third quarter of the second year of NASA Sun-Earth Connections Theory Program (SECTP) contract 'The Structure and Dynamics of the Solar Corona and Inner Heliosphere,' NAS5-99188, between NASA and Science Applications International Corporation, and covers the period February 16, 2001 to May 15, 2001. Under this contract SAIC and the University of California, Irvine (UCI) have conducted research into theoretical modeling of active regions, the...
Topics: NASA Technical Reports Server (NTRS), MAGNETOHYDRODYNAMICS, SOLAR PHYSICS, HELIOSPHERE, SOLAR...
215
215
Jul 6, 2010
07/10
by
RYASIN, V. A
texts
eye 215
favorite 0
comment 0
AN OPTIMUM STRATEGY IS COMPILED FOR THE PULSE CORRECTION OF A SPACECRAFT MOVING CLOSE TO THE RATED TRAJECTORY. THE PULSE CORRECTIONS OF THE DEVIATIONS IN THE ACTUAL TRAJECTORY FROM THE RATED TRAJECTORY ARE DISCUSSED IN TERMS OF SELECTING THE CONTROL METHOD THAT CONSUMES A MINIMUM OF FUEL. THE DIFFERENTIAL EQUATIONS FOR THE SPACECRAFT MOTION IN THE VICINITY OF THE RATED TRAJECTORY ARE USED TO DETERMINE THE OPTIMUM STRATEGY FOR ONE OR TWO CORRECTIONS. IT IS CONCLUDED THAT THE SUCCESS PROBABILITY...
Topics: MONOCHROMATIC RADIATION, RADIO WAVES, SOLAR CORONA, SOLAR WIND, ELECTRON DENSITY (CONCENTRATION),...
The observed properties of coronal Alfven waves in the solar wind at 1 AU are briefly reviewed, with some theoretical discussion of their probable effects on the dynamics of the expanding solar corona. It is concluded that coronal Alfven waves can have a major influence on both the small- and large-scale properties of the wind at 1 AU.
Topics: NASA Technical Reports Server (NTRS), MAGNETOHYDRODYNAMIC WAVES, SOLAR CORONA, DYNAMIC...
236
236
Jul 11, 2010
07/10
by
SIMBURSKIY, D. F.; OLEYNIK, A. V.; SKRIPKA, A. I
texts
eye 236
favorite 0
comment 0
A SEMIEMPIRICAL METHOD OF DETERMINING THE LOCAL THERMAL FLUXES AND HEAT TRANSFER COEFFICIENTS FOR TURBINE BLADES AND SIMILAR ELEMENTS IS PROPOSED. IT IS BASED ON THE USE OF THIN FILM THERMOCOUPLES, WHICH DO NOT DISTORT THE HEAT TRANSFER CONDITIONS AND THE TEMPERATURE FIELD AT THE SURFACE, AND ON THE SOLUTION OF THE INVERSE NONSTATIONARY HEAT CONDUCTION PROBLEMS.
Topics: ELECTROMAGNETIC RADIATION, MECHANICAL PROPERTIES, OPTICAL PROPERTIES, WAVE PROPAGATION, ANALOGIES,...
282
282
Jul 5, 2010
07/10
by
Marschak, M., et al
texts
eye 282
favorite 0
comment 0
No Abstract Available
Topics: SOLAR CORONA, SOLAR SPECTRA, SOLAR X-RAYS, GEOPHYSICAL SATELLITES, PHOTOMETERS, SOLAR FLUX DENSITY,...
Context. Helicity is a fundamental property of magnetic fields, conserved in ideal MHD. In flux rope topology, it consists of twist and writhe helicity. Despite the common occurrence of helical structures in the solar atmosphere, little is known about how their shape relates to the writhe, which fraction of helicity is contained in writhe, and how much helicity is exchanged between twist and writhe when they erupt. Aims. Here we perform a quantitative investigation of these questions relevant...
Topics: DTIC Archive, OBSERVATOIRE DE PARIS (FRANCE), *HELIXES, *SOLAR CORONA, CORONAL MASS EJECTIONS,...
The opportunity for nearly continuous observation of those parts of the solar corona remote from the sun places new requirements on the freedom of the coronagraph from scattered light. Several possible means of improving the coronagraph are described. It is found that the available optical media do not permit a significant reduction in the scattered light in the ordinary coronagraph. The reflecting coronagraph and the simple, externally occulted coronagraph can be made freer of scattered light...
Topics: DTIC Archive, Newkirk, Gordon, Jr, HIGH ALTITUDE OBSERVATORY BOULDER CO, *SPECTROGRAPHS, *SOLAR...
Double scattering corrections for aureole radiances are calculated by adding the effects of two successive single scatterings. Atmospheric absorption, polarization, and variation of refractive index with altitude are ignored. Corrections due to spherical atmosphere were taken into account by the use of a generalized Chapman function. Realistic scattering phase functions based upon the Lorenz-Mie theory and model altitude-size distribution are used. The model distribution is assumed to be...
Topics: NASA Technical Reports Server (NTRS), LIGHT SCATTERING, SOLAR CORONA, ATMOSPHERIC ATTENUATION,...
Topics: NASA Technical Reports Server (NTRS), OSO-7, SOLAR CORONA, SOLAR PROBES, LAUNCH WINDOWS, MISSION...
Recent results from the analysis of Hinode data have been used to determine the origins of the fast and slow solar wind, possible heating sources for the solar corona, and onset locations for CMEs and polar x-ray jets. Using this information, and data collected by other observatories, major advances in the understanding of Heliophysics are now possible. These Hinode observations, and the techniques for analysis of the Hinode data will be discussed."
Topics: NASA Technical Reports Server (NTRS), SOLAR WIND, SOLAR CORONA, HEATING, POSITION (LOCATION), X...
CONTEXT: The Na x X-ray lines between 10.9 and 11.2 have attracted little attention but are of interest since they enable an estimate of the coronal abundance of Na to be made. This is of great interest in the continuing debate on the nature of the FIP (first ionization potential) effect. AIMS: Observations of the Na x lines with the Solar Maximum Mission Flat Crystal Spectrometer and a rocket-borne X-ray spectrometer are used to measure the Na/Ne abundance ratio, i.e. the ratio of an element...
Topics: DTIC Archive, NAVAL RESEARCH LAB WASHINGTON DC, *X RAYS, *GAMMA RAYS, SOLAR CORONA, IONIZATION,...
477
477
Jun 27, 2010
06/10
by
Thomas, J. M
texts
eye 477
favorite 0
comment 0
Statistical analysis of Saturn 5 test data for determination of safety factor requirements of untested structures
Topics: FREQUENCY MEASUREMENT, SOLAR CORONA, SOLAR RADAR ECHOES, TURBULENCE, SOLAR ACTIVITY, SOLAR SPECTRA,...
The sequence of condensation of minerals from a cooling gas of solar composition has been calculated from thermodynamic data over the pressure range 0.001-0.00001 atm, assuming that complete chemical equilibrium is maintained. The results suggest that the Ca-Al-rich inclusions Allende and other carbonaceous chondrites are aggregates of the highest temperature condensates. Complete condensation of these elements is followed, 100 deg later, by the onset of the crystallization of nickel-iron,...
Topics: NASA Technical Reports Server (NTRS), CHEMICAL FRACTIONATION, PHASE TRANSFORMATIONS, SOLAR CORONA,...
This report covers technical progress during the fourth quarter of the second year of NASA Sun-Earth Connections Theory Program (SECTP) contract 'The Structure and Dynamics of the Solar Corona and Inner Heliosphere,' NAS5-99188, between NASA and Science Applications International Corporation, and covers the period May 16,2001 to August 15, 2001. Under this contract SAIC and the University of California, Irvine (UCI) have conducted research into theoretical modeling of active regions, the solar...
Topics: NASA Technical Reports Server (NTRS), HELIOSPHERE, MAGNETOHYDRODYNAMICS, SOLAR PHYSICS, SOLAR...
This massive reference work (hereafter EAA) summarizes a great deal of what we knew in the astronomical sciences at the most recent Millennium. An associated website may keep much of it up-to-date for years to come. The contents are extensive indeed: the index alone consists of 76 pages, each with three columns of fine-type listings, and there are 'nearly 700 main articles'. The main articles are what make EAA worthwhile. They are generally by experts, who took much care in their preparation....
Topics: NASA Technical Reports Server (NTRS), ASTRONOMY, ASTROPHYSICS, SOLAR PHYSICS, DOCUMENTS, SOLAR...
The effects of the reduction in the thermal conductivity due to heavy ions on electron temperatures in the solar corona and solar wind are examined. Large enhancements of heavy ions in the corona appear to be necessary to give appreciable changes in the thermal gradient of the electrons.
Topics: NASA Technical Reports Server (NTRS), ELECTRON ENERGY, HEAVY IONS, SOLAR WIND, SOLAR CORONA,...
This report covers technical progress during the first year of the NASA Space Physics Theory contract between NASA and Science Applications International Corporation. Under this contract SAIC, the University of California, Irvine (UCI), and the Jet Propulsion Laboratory (JPL), have conducted research into theoretical modeling of active regions, the solar corona, and the inner heliosphere, using the MHD model. During the period covered by this report we have published 26 articles in the...
Topics: NASA Technical Reports Server (NTRS), ATMOSPHERIC PHYSICS, SOLAR CORONA, MATHEMATICAL MODELS,...
The transition from a supersonic to a subsonic corona was investigated by increasing the density N sub O at the base of the corona while keeping the temperature T sub O constant. For the initial values of N sub O and T sub O, the solution of the inviscid solar wind equations is of the Parker type. As N sub O is increased, Parker type supersonic solutions cease to exist. No subsonic solutions exist.
Topics: NASA Technical Reports Server (NTRS), ELECTRON DENSITY (CONCENTRATION), SOLAR WIND, SOLAR CORONA,...
A central goal of solar and space physics is to understand the influence of the sun and its activity on the heliosphere, particularly the space environment near the Earth. A quantitative description of the ambient solar corona and solar wind is key to understanding this influence. This report describes important features of CORHEL (for CORona-Heliosphere), a suite of models and tools for modeling the solar corona and inner heliosphere. Support from this project has facilitated further...
Topics: DTIC Archive, SCIENCE APPLICATIONS INTERNATIONAL CORP SAN DIEGO CA, *SPACE ENVIRONMENTS,...
An approximate analytic theory of acoustic shock propagation in nonuniform media is used to determine the motion of a flare-generated shock wave in the corona. The shock is followed from the time it strikes the chromosphere-corona transition region (density interface) out to 5 solar radii under the assumption that the corona in this region is approximately in hydrostatic equilibrium. The strength of the shock incident on the transition region from below determines the ejection velocity of...
Topics: NASA Technical Reports Server (NTRS), SHOCK WAVES, SOLAR CORONA, WAVE PROPAGATION, ACOUSTIC...
The Large Angle Spectrometric Coronagraph (LASCO) on board SOHO provided unprecedented views of the solar corona since January 1996. This instrument contains three individual coronagraphs C1, C2, and C3, described in detail in Brueckner et al (1995). The C1 coronagraph acquires high resolution images (11" and higher) of the lower corona from 1.1 R to 3.0 R, thereby providing a close link to the disk observations of other instruments in the SOHO complement. The C2 and C3 images have lower...
Topics: DTIC Archive, Karovska, Margarita, HARVARD-SMITHSONIAN CENTER FOR ASTROPHYSICS CAMBRIDGE MA, *SOLAR...
326
326
May 24, 2011
05/11
by
NON
texts
eye 326
favorite 0
comment 0
A laser-directed ranging system has utility for use in various fields, such as telerobotics applications and other applications involving physically handicapped individuals. The ranging system includes a single video camera and a directional light source such as a laser mounted on a camera platform, and a remotely positioned operator. In one embodiment, the position of the camera platform is controlled by three servo motors to orient the roll axis, pitch axis and yaw axis of the video cameras,...
Topics: ASTRONOMICAL MODELS, LYMAN ALPHA RADIATION, PHOTOCHEMICAL REACTIONS, SOLAR CORONA, SOLAR SYSTEM,...
Under this contract SAIC, the University of California, Irvine (UCI), and the Jet Propulsion Laboratory (JPL), have conducted research into theoretical modeling of active regions, the solar corona, and the inner heliosphere, using the MHD model. During the period covered by this report we have published 17 articles in the scientific literature. These publications are listed in Section 4 of this report. In the Appendix we have attached reprints of selected articles.
Topics: NASA Technical Reports Server (NTRS), MATHEMATICAL MODELS, SOLAR CORONA, MAGNETOHYDRODYNAMICS, JET...
233
233
Sep 20, 2010
09/10
by
Homaifar, Abdollah; Mccormick, E
texts
eye 233
favorite 0
comment 0
This paper examines the applicability of genetic algorithms (GA) in the complete design of fuzzy logic controllers. While GA has been used before in the development of rule sets or high performance membership functions, the interdependence between these two components dictates that they should be designed together simultaneously. GA is fully capable of creating complete fuzzy controllers given the equations of motion of the system, eliminating the need for human input in the design loop. We...
Topics: FORCE-FREE MAGNETIC FIELDS, MATHEMATICAL MODELS, SOLAR CORONA, SOLAR MAGNETIC FIELD, BOUNDARY...
The objective of this research is to develop a new photospheric driver to assimilate radial magnetic maps into magneto-frictional (MF) simulations of the Suns coronal magnetic field. Together with the Air Force Data Assimilative Photospheric Flux Transport (ADAPT) Model to assess how the MF model can improve background solar wind forecasts and whether flux ropes in the model can constrain magnetic topology or interplanetary magnetic fields. In the second year of the project improved filtering...
Topics: DTIC Archive, Yeates,Anthony, University of Durham Durham United Kingdom, magnetic fields, solar...
217
217
Jun 12, 2011
06/11
by
Nuth, J. A.; Brearley, A. J.; Scott, E. R. D
texts
eye 217
favorite 0
comment 0
Comets, fine-grained matrices of chondrites, and chondritic interplanetary dust particles (IDPs) are each composed of both crystalline and amorphous silicates. The primitive solar nebula, in which comets and asteroids accreted, was formed from the collapsed core of a Giant Molecular Cloud, that, in turn, condensed from materials present in the interstellar medium (ISM). Despite observations that reveal the presence of crystalline magnesium silicate minerals in the shells of very high...
Topics: NONLINEARITY, WAVE REFLECTION, SOLAR CORONA, SOLAR WIND, TURBULENCE, WENTZEL-KRAMER-BRILLOUIN...
The existence of 'holes' in the corona is reported characterized by abnormally low densities and temperatures. It was found that such coronal holes appear to be the source of high-velocity, enhanced-density streams in the solar wind as observed at the earth's orbit. It was further noted that coronal holes appear to be associated with regions of diverging magnetic fields in the corona. Models were developed to accomplish the objective for the principal energy flows in the transition region and...
Topics: NASA Technical Reports Server (NTRS), SOLAR ACTIVITY, SOLAR ATMOSPHERE, MAGNETIC FIELDS, SOLAR...
