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66
Nov 25, 2009
11/09
by
NASA/Goddard Space Flight Center Conceptual Images Lab
movies
eye 66
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Animation of an active region on far side rotating to near side, where a coronal mass ejection occurs. Note: Sunspots are associated with active regions which can launch coronal mass ejections. Animator: Walt Feimer (HTSI).
Topic: Coronal Mass Ejection
Source: http://svs.gsfc.nasa.gov/goto?10073
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367
Nov 18, 2009
11/09
by
NASA/Goddard Space Flight Center Conceptual Image Lab
movies
eye 367
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This sequence of images is from a computer animation illustrating an artist's concept of Coronal Mass Ejection (CME) cannibalism. Coronal Mass Ejections (CMEs) are clouds of electrified, magnetic gas weighing billions of tons ejected from the Sun and hurled into space with speeds ranging from 12 to 1,250 miles per second (about 20 to 2,000 kilometers per second). The first CME blasts from the right side of the sun (bright, white area), and as it expands into space, it becomes fainter. A second...
Topics: Coronal Mass Ejection, HDTV, What -- Sun, What -- Earth
Source: http://svs.gsfc.nasa.gov/goto?10070
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120
Nov 25, 2009
11/09
by
NASA/Goddard Space Flight Center
movies
eye 120
favorite 0
comment 0
In the weeks surrounding Halloween in 2003, the sun unleashed a series of spooky storms towards the Earth, storms that ignited lots of ghostly looking auroras, but that also wreaked havoc with power grids, satellites and other electrical equipment. On the fifth anniversary of these unprecedented storms, NASA takes a look back at the Sun during these haunting days. Note: From October 25, 2003, to November 7, 2003, the sun sent a series of solar storms that lit up the sky with ghoulish auroras....
Topics: Coronal Mass Ejection, HDTV, What -- Sun, What -- Earth
Source: http://svs.gsfc.nasa.gov/goto?10338
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79
Nov 18, 2009
11/09
by
NASA/Goddard Space Flight Center Conceptual Image Lab
movies
eye 79
favorite 1
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Animator: Walt Feimer (HTSI). Scientist: Therese Kucera (NASA/GSFC).
Topics: Coronal Mass Ejection, Space science, Sun, What -- Sun
Source: http://svs.gsfc.nasa.gov/goto?10066
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60
Oct 29, 2009
10/09
by
NASA/Goddard Space Flight Center Scientific Visualization Studio
movies
eye 60
favorite 0
comment 0
Using differences in polarization of light directly from the Sun vs. scattered from the CME electrons, it is possible to derive a distance of matter along the line-of-sight. This version is an early release of animation ID
Topics: CME, Coronal Mass Ejection, Space science, Sun, What -- Sun
Source: http://svs.gsfc.nasa.gov/goto?2950
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115
Nov 18, 2009
11/09
by
NASA/Goddard Space Flight Center Conceptual Image Lab
movies
eye 115
favorite 3
comment 0
Coronal mass ejections (CME) can propagate from the Sun to the boundary with interstellar space. Animator: Walt Feimer (HTSI).
Topics: Coronal Mass Ejection, HDTV, Heliosphere, Space science, Sun, What -- Sun
Source: http://svs.gsfc.nasa.gov/goto?10037
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55
Oct 29, 2009
10/09
by
NASA/Goddard Space Flight Center Scientific Visualization Studio
movies
eye 55
favorite 0
comment 0
Using differences in polarization of light directly from the Sun vs. scattered from the CME electrons, it is possible to derive a distance of matter along the line-of-sight. This version is an enhanced version of animation ID
Topics: CME, Coronal Mass Ejection, HDTV, Space science, Sun, What -- Sun
Source: http://svs.gsfc.nasa.gov/goto?2958
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262
Jun 2, 2011
06/11
by
Loh, Ching Y
texts
eye 262
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Over the last five years, the Aircraft Icing Project of the NASA Aviation Safety Program has developed a number of in-flight icing education and training aids to support increased awareness for pilots of the hazards associated with atmospheric icing conditions. Through the development of this work, a number of new instructional design approaches and media delivery methods have been introduced to enhance the learning experience, expand user interactivity and participation, and, hopefully,...
Topics: CORONAL MASS EJECTION, SOLAR WIND, DATA PROCESSING, FITTING, NUMERICAL ANALYSIS, EVOLUTION...
620
620
Nov 18, 2009
11/09
by
NASA/Goddard Space Flight Center Conceptual Image Lab
movies
eye 620
favorite 5
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This computer animation illustrates the Earth's space storm shield in action. The solar wind, a thin, high-velocity electrified gas, or plasma, blows constantly from the Sun at an average speed of 250 miles per second (400 kilometers/sec). It is represented as a stream of yellow particles flowing from the Sun. The solar wind impacts the Earth's magnetic field, represented by the blue lines. As the solar wind flows past the Earth's magnetic field, it generates enormous electric currents that...
Topics: Coronal Mass Ejection, Magnetic Fields, Magnetosphere, What -- Sun, What -- Earth, What -- Polar
Source: http://svs.gsfc.nasa.gov/goto?10076
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670
Mar 4, 2009
03/09
by
NASA LaRC Office of Education
movies
eye 670
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comment 0
Eighth segment of NASA Sci Files The Case of the Technical Knockout explaining the different type of solar flares and how solar activity affects the Earth.
Topics: NASA SciFiles, atmosphere, flares, coronal mass ejection, The Case of the Technical Knockout
Source: http://nasa.ibiblio.org/details.php?videoid=6523&start=0&subject=Technology
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228
Nov 18, 2009
11/09
by
NASA/Goddard Space Flight Center Conceptual Image Lab
movies
eye 228
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A coronal mass ejection (CME) passes the Voyager spacecraft far beyond Pluto. Note: The CME hits the Voyager spacecraft. Animator: Walt Feimer (HTSI).
Topics: Coronal Mass Ejection, HDTV, Space science, Sun, What -- Voyager, What -- Pluto, What -- Sun
Source: http://svs.gsfc.nasa.gov/goto?10044
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191
Nov 18, 2009
11/09
by
NASA/Goddard Space Flight Center Conceptual Image Lab
movies
eye 191
favorite 3
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This is a closer view of Comet Encke's collision with a Coronal Mass Ejection (CME) as seen by the STEREO satellite on April 20, 2007. The collision is notable because it completely removed Encke's tail. The blue color here is a gradient added to help make the comet and CME more visible. Note: Closeup of Comet Encke Animator: Walt Feimer (HTSI). Scientist: Angelos Vourlidas (NRL). Platforms/Sensors/Data Sets: STEREO.
Topics: Comet, Coronal Mass Ejection, Sun, Solar System, Comet Encke, What -- STEREO, What -- Sun
Source: http://svs.gsfc.nasa.gov/goto?10176
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214
Jun 3, 2011
06/11
by
Nallasamy, M.; Hixon, R.; Sawyer, S
texts
eye 214
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This paper examines mode generation and propagation characteristics of a 2-D cascade due to incident vortical disturbances using a time domain approach. Full nonlinear Euler equations are solved employing high order accurate spatial differencing and time marching techniques. The solutions show the generation and propagation of mode orders that are expected from theory. Single frequency excitations show linear response over a wide range of amplitudes. The response for multi-frequency excitations...
Topics: HEAVY ELEMENTS, ABUNDANCE, SOLAR ACTIVITY, ENERGETIC PARTICLES, IRON, OXYGEN, SHOCK WAVES, CORONAL...
The Whole Heliospheric Interval (WHI) period of 20 March - 16 April had a "quiet side" of the Sun, and an "active side," with three ARs. At least two of the ARs produced CMEs, but there were several events that may have been "confined eruptions" from these regions too. Examining the magnetic environment of the erupting regions gives insight into the onset and dynamics of the eruptions. Several of the CMEs can be traced back to likely disk sources, but several...
Topics: NASA Technical Reports Server (NTRS), HELIOSPHERE, LOWER ATMOSPHERE, CORONAL MASS EJECTION, SUN,...
134
134
Jun 1, 2011
06/11
by
Chou, Shu-Hsien; Chou, Ming-Dah; Chan, Pui-King; Lin, Po-Hsiung; Wang, Kung-Hw
texts
eye 134
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Seasonal and interannual variations of the net surface heating F(sub NET) and sea surface temperature tendency (T(sub s)/dt) in the tropical eastern Indian and western Pacific Oceans are studied. The surface heat fluxes are derived from the Special Sensor Microwave/Imager and Japanese Geostationary Meteorological Satellite radiance measurements for the period October 1997-September 2000. It is found that the magnitude of solar heating is lager than that of evaporative cooling, but the spatial...
Topics: SOLAR FLARES, CORONAL MASS EJECTION, PARTICLE ENERGY, SOLAR CORPUSCULAR RADIATION, SOLAR STORMS,...
217
217
Jun 13, 2011
06/11
by
Thronesbery, Carroll; Malin, Jane T.; Jenks, Kenneth; Overland, David; Oliver, Patrick; Zhang, Jiajie; Gong, Yang; Zhang, Ta
texts
eye 217
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Concepts and prototypes1,2 are discussed for a data-based console logger (D-Logger) to meet new challenges for coordination among flight controllers arising from new exploration mission concepts. The challenges include communication delays, increased crew autonomy, multiple concurrent missions, reduced-size flight support teams that include multidisciplinary flight controllers during quiescent periods, and migrating some flight support activities to flight controller offices. A spiral...
Topics: STELLAR MASS, CORONAL MASS EJECTION, AFTERGLOWS, GAMMA RAY BURSTS, LIGHT EMISSION, POSITION...
306
306
Jun 13, 2011
06/11
by
Prasad, Narasimha S.; Singh, Upendra N.; Hovis, Floy
texts
eye 306
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In this paper, recent progress made in the design and development of an all-solid-state, single longitudinal mode, conductively cooled Nd:YAG laser operating at 1064 nm wavelength for UV lidar for ozone sensing applications is presented. Currently, this pump laser provides an output pulse energy of greater than 1.1 J/pulse at 50 Hz PRF and a pulsewidth of 22 ns. The spatial profile of the output beam is a rectangular super Gaussian. Electrical-to-optical system efficiency of greater than 7% and...
Topics: GEOMAGNETISM, SUNSPOT CYCLE, SOLAR ACTIVITY, CORONAL MASS EJECTION, SOLAR FLARES, SOLAR WIND, HIGH...
1,156
1.2K
May 28, 2011
05/11
by
Platt, R
texts
eye 1,156
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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,...
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200
May 31, 2011
05/11
by
Niiler, Pearn P.; Letelier, Ricardo; Moisan, John R
texts
eye 200
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In the first part of the project, we investigated the local response of the coastal ocean ecosystems (changes in chlorophyll, concentration and chlorophyll, fluorescence quantum yield) to physical forcing by developing and deploying Autonomous Drifting Ocean Stations (ADOS) within several mesoscale features along the U.S. west coast. Also, we compared the temporal and spatial variability registered by sensors mounted in the drifters to that registered by the sensors mounted in the satellites in...
Topics: HELIOSPHERE, MAGNETIC FIELD CONFIGURATIONS, ULYSSES MISSION, CURRENT SHEETS, MAGNETIC CLOUDS, SOLAR...
127
127
Nov 25, 2009
11/09
by
NASA/Goddard Space Flight Center
movies
eye 127
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Note: NASA's THEMIS mission has overturned a longstanding belief about the interaction between solar particles and Earth's protective magnetic field. This new discovery could help scientists predict when the solar storms that can disrupt power grids, satellites and even GPS signals, could be especially severe.For more information: www.nasa.gov/themisFor complete transcript, click
Topics: Coronal Mass Ejection, HDTV, Magnetic Fields, Magnetosphere, Sun, THEMIS, What -- THEMIS, What --...
Source: http://svs.gsfc.nasa.gov/goto?10356
In this paper, I present an overview of the solar and interplanetary characteristics of the events selected to be analyzed during the workshop. The events were selected based on the following criteria: 1. The events must be well observed in the interplanetary medium as shock-driving interplanetary coronal mass ejections (ICMEs), 2. The ICMEs should have corresponding CMEs near the Sun, observed in white-light coronal images, and 3. The heliographic coordinates of the solar sources must be...
Topics: NASA Technical Reports Server (NTRS), CORONAL MASS EJECTION, CORONAS, INTERPLANETARY MEDIUM,...
398
398
Nov 18, 2009
11/09
by
NASA/Goddard Space Flight Center Conceptual Image Lab
movies
eye 398
favorite 2
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A burst of fast material from the Sun generates magnetic reconnection events in the Earth's magnetic field. This eventually sends high-speed electrons and protons into the Earth's upper atmosphere to form aurora. Note: View the impact of a coronal mass ejection against the Earth's magnetic field. Animator: Walt Feimer (HTSI). Platforms/Sensors/Data Sets: 3D Unstructured-mesh Magnetosphere Simulation.
Topics: Aurora, Coronal Mass Ejection, Electron, Geomagnetic Field, Magnetic Fields, Magnetosphere, Space...
Source: http://svs.gsfc.nasa.gov/goto?10059
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163
Jun 2, 2011
06/11
by
Gupta, Mohan; Douglass, Anne; Kawa, S. Randy; Pawson, Steve
texts
eye 163
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We have investigated the importance of intercontinental transport using source-receptor relationship. A global radon-like and seven regional tracers were used in three-dimensional model simulations to quantify their contributions to column burdens and vertical profiles at world-wide receptors. Sensitivity of these contributions to meteorological input was examined using different years of meteorology in two atmospheric simulations. Results show that Asian emission influences tracer...
Topics: CORONAL MASS EJECTION, GALACTIC COSMIC RAYS, SOLAR ACTIVITY EFFECTS, SOLAR WIND, SOLAR CYCLES,...
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139
Jun 11, 2011
06/11
by
Huang, Frank T.; Mayr, Hans G.; Reber, Carl A
texts
eye 139
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Based on an empirical analysis of measurements with the High Resolution Doppler Imager (HRDI) on the UARS spacecraft in the upper mesosphere (95 km), persistent and regular intra-seasonal oscillations (ISO) with periods of about 2 to 4 months have recently been reported in the zonal-mean meridional winds. Similar oscillations have also been discussed independently in a modeling study, and they were attributed to wave-mean-flow interactions. The observed and modeled meridional wind ISOs were...
Topics: SOLAR CYCLES, SOLAR CORPUSCULAR RADIATION, ENERGETIC PARTICLES, PERIODIC VARIATIONS, CORONAL MASS...
211
211
Oct 29, 2009
10/09
by
NASA/Goddard Space Flight Center Scientific Visualization Studio
movies
eye 211
favorite 2
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Spacecraft (green trajectory) on their way from the Earth (blue orbit) to Mars (red orbit) risk being hit by energetic events from the Sun, such as X-rays, energetic protons (blue streaks), and material from Coronal Mass Ejections (CMEs) (red blobs). The spiral lines from the Sun represent the magnetic field lines 'frozen' into the solar wind. Note: Movie of spacecraft on an Earth-to-Mars trajectory. Animator: Tom Bridgman (GST), Greg Shirah (NASA/GSFC). Scientist: Dan Spicer (NASA/GSFC).
Topics: Coronal Mass Ejection, Earth, HDTV, Mars, Space science, Sun, X-ray, What -- Earth, What -- Mars,...
Source: http://svs.gsfc.nasa.gov/goto?2924
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380
May 31, 2011
05/11
by
Feinberg, Arthur; Tauss, Jame
texts
eye 380
favorite 0
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Weather is a contributing factor in approximately 25-30 percent of general aviation accidents. The lack of timely, accurate and usable weather information to the general aviation pilot in the cockpit to enhance pilot situational awareness and improve pilot judgment remains a major impediment to improving aviation safety. NASA Glenn Research Center commissioned this 120 day weather datalink market survey to assess the technologies, infrastructure, products, and services of commercial avionics...
Topics: GEOMAGNETISM, SOLAR ACTIVITY EFFECTS, SOLAR CYCLES, SOLAR WIND, INTERPLANETARY MAGNETIC FIELDS,...
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388
May 31, 2011
05/11
by
Ahn, C.; Ziemke, J. R.; Chandra, S.; Bhartia, P. K
texts
eye 388
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A recently developed technique called cloud slicing used for deriving upper tropospheric ozone from the Nimbus 7 Total Ozone Mapping Spectrometer (TOMS) instrument combined together with temperature-humidity and infrared radiometer (THIR) is no longer applicable to the Earth Probe TOMS (EPTOMS) because EPTOMS does not have an instrument to measure cloud top temperatures. For continuing monitoring of tropospheric ozone between 200-500hPa and testing the feasibility of this technique across...
Topics: CORONAL MASS EJECTION, INTERPLANETARY MEDIUM, SOLAR WIND, SOLAR PROMINENCES, PERIODIC VARIATIONS,...
220
220
May 6, 2010
05/10
by
Mittlefehldt, David W.; Yingst, R. A; Gellert, R.; Herkenhoff, K. E.; Clark, B. C.; Cohen, B. A.; Fleischer, I.; Jolliff, B. L.; Klingelhoefer, G.; Ming, D. W.
texts
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While rolling over the Meridiani Planum sedimentary terrane, the rover Opportunity has occasionally discovered large, 10 cm erratics. Most of these have proven to be meteorites [1], but one - Bounce Rock - is a martian basaltic rock similar in composition to the meteorite EETA79001 lithology B [2]. Presently, Opportunity is intensively investigating an --30 cm tall rock named Marquette Island that may be a distinct type of martian mafic lithology. We report the results of its continuing...
Topics: CORONAL MASS EJECTION, MAGNETIC FIELD RECONNECTION, MAGNETIC FIELDS, SOLAR X-RAYS, CORONAL HOLES,...
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237
May 29, 2011
05/11
by
Baker, Charles; Butler, Dan; Ku, Jentung; Kaya, Tarik; Nikitkin, Michae
texts
eye 237
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This paper presents viewgraphs on Thermal Vacuum Tests of the GLAS (Geoscience Laser Altimeter System) Propylene Loop Heat Pipe Development Model. The topics include: 1) Flight LHP System (Laser); 2) Test Design and Objectives; 3) DM (Development Model) LHP (Loop Heat Pipe) Test Design; 4) Starter Heater and Coupling Blocks; 5) CC Control Heaters and PRT; 6) Heater Plates (Shown in Reflux Mode); 7) Startup Tests; 8) CC Control Heater Power Tests for CC Temperature Control; and 9) Control...
Topics: EXTREME ULTRAVIOLET RADIATION, SHOCK WAVES, TYPE 2 BURSTS, SOLAR FLARES, CORONAL MASS EJECTION,...
398
398
Nov 18, 2009
11/09
by
NASA/Goddard Space Flight Center Conceptual Image Lab
movies
eye 398
favorite 1
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Note: A coronal mass ejection erupts from the Sun and propagates out through the Solar System. Along the way it is detected by the spacecraft at Jupiter and Saturn. Eventually it is detected by the two Voyager spacecraft beyond the orbit of Pluto. Animator: Walt Feimer (HTSI).
Topics: Coronal Mass Ejection, Jupiter, Solar Flare, Space science, Sun, What -- Sun, What -- Jupiter, What...
Source: http://svs.gsfc.nasa.gov/goto?10045
This report summarizes the technical progress made during the first six months of the second year of the NASA Living with a Star program contract Understanding the global structure and evolution of coronal mass ejections in the solar wind, between NASA and Science Applications International Corporation, and covers the period November 18, 2003 - May 17,2004. Under this contract SAIC has conducted numerical and data analysis related to fundamental issues concerning the origin, intrinsic...
Topics: NASA Technical Reports Server (NTRS), CORONAL MASS EJECTION, SOLAR WIND, DATA PROCESSING, FITTING,...
The Large-Angle and Spectrometric Coronagraph (LASCO) on board SOHO observed a fast halo coronal mass ejection on 2011 February 15. The STEREO spacecraft were in quadrature with SOHO (STEREO-A ahead of Earth by 87 degrees and STEREO-B 94 degrees behind Earth), enabling CME measurement using the three spacecraft. The sky-plane speed measured by SOHO/LASCO is closely related to the expansion speed of the CME, while the radial speed was measured by STEREO-A and STEREO-B. In addition, STEREO-A and...
Topics: NASA Technical Reports Server (NTRS), CORONAL MASS EJECTION, SOHO MISSION, STEREO (OBSERVATORY),...
This investigation is concerned with the large-scale evolution and topology of coronal mass ejections (CMEs) in the solar wind. During the course of this three-year investigation, we have undertaken a number of studies that are discussed in more detail in this report. For example, we conducted an analysis of all CMEs observed by the Ulysses spacecraft during its in-ecliptic phase between 1 and 5 AU. In addition to studying the properties of the ejecta, we also analyzed the shocks that could be...
Topics: NASA Technical Reports Server (NTRS), CORONAL MASS EJECTION, SOLAR WIND, TOPOLOGY, EVOLUTION...
Coronal mass ejections (CMEs) are the most energetic phenomenon in the heliosphere. During solar eruptions, the released energy flows out from the Sun in the form of magnetized plasma and electromagnetic radiation. The electromagnetic radiation suddenly increases the ionization content of the ionosphere, thus impacting communication and navigation systems. The plasma clouds can drive shocks that accelerate charged particles to very high energies in the interplanetary space, which pose radiation...
Topics: NASA Technical Reports Server (NTRS), CORONAL MASS EJECTION, HELIOSPHERE, INTERPLANETARY MEDIUM,...
No abstract available
Topics: NASA Technical Reports Server (NTRS), SOLAR FLARES, CORONAL MASS EJECTION, HELIOSPHERE, MAGNETIC...
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170
May 31, 2011
05/11
by
Nordeen, M. L.; Doelling, D. R.; Khaiyer, M. M.; Rapp, A. D.; Minnis, P.; Nguyen, L
texts
eye 170
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Satellite monitoring is used to supplement the paucity of surface data in the Tropical Western Pacific (TWP). By using satellite data, cloud properties and top-of-atmosphere broadband radiative fluxes can be derived and used for a variety of applications. In turn, these products may be used to develop a climatological base for the TWP. The focus of this study is to produce satellite-derived cloud properties over the TWP.
Topics: SOLAR CORONA, CORONAL MASS EJECTION, MAGNETOHYDRODYNAMICS, COMPUTERIZED SIMULATION, THREE...
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207
Jun 2, 2011
06/11
by
Cone, Clarence D., Jr
texts
eye 207
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The induced drag polar is developed for wt-ngs capable of attaining extremely high loadings while possessing an elliptical distribution of circulation. This development is accomplished through a theoretical investigation of the vortex-wake deformation process and the deduction of the airfoil forces from the impulse and kinetic energy contents of the ultimate wake form. The investigation shows that the induced velocities of the wake limit the maximum lift coefficient to a value of 1.94 times the...
Topics: MAGNETOHYDRODYNAMICS, SOLAR ACTIVITY, SOLAR CORONA, SOLAR MAGNETIC FIELD, MAGNETIC FIELD...
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404
May 23, 2011
05/11
by
Bahcall, John; Fisher, Karl; Miralda-Escude, Jordi; Strauss, Michael; Weinberg, Davi
texts
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This grant supported research by the investigators through summer salary support for Strauss and Weinberg, support for graduate students at Princeton University and Ohio State University, and travel, visitor, and publication support for the investigators. The grant originally had a duration of 1 year, and it was extended (without additional funding) for an additional year. The impact of the grant was considerable given its relatively modest duration and funding level, in part because it...
Topics: CURRENT DENSITY, DYNAMIC RESPONSE, POLARITY, CORONAS, MAGNETIC FIELD CONFIGURATIONS, MAGNETIC...
No abstract available
Topics: NASA Technical Reports Server (NTRS), SPACE WEATHER, SOLAR FLARES, ECONOMICS, SECURITY, WEATHER...
Wave transients at EUV wavelengths and type II radio bursts are good indicators of shock formation in the solar corona. We use recent EUV wave observations from SDO and combine them with metric type II radio data to estimate the height in the corona where the shocks form. We compare the results with those obtained from other methods. We also estimate the shock formation heights independently using white-light observations of coronal mass ejections that ultimately drive the shocks.
Topics: NASA Technical Reports Server (NTRS), EXTREME ULTRAVIOLET RADIATION, RADIO BURSTS, RADIO...
In this paper, I summarize some of the results obtained during previous CDAW on the events selected for analysis. The events were selected based on the following criteria: 1. The events must be well observed in the interplanetary medium as shock-driving interplanetary coronal mass ejections (ICMEs), 2. The ICMEs should have corresponding CMEs near the Sun, observed in white-light coronal images, and 3. The heliographic coordinates of the solar sources must be within 15 degrees from the Sun...
Topics: NASA Technical Reports Server (NTRS), CORONAL MASS EJECTION, INTERPLANETARY MEDIUM, MAGNETIC...
We investigate the use of multiple simultaneous solar wind plasma compositional anomalies, relative to the composition of the ambient solar wind, for identifying interplanetary coronal mass ejection (ICME) plasma. We first summarize the characteristics of several solar wind plasma composition signatures (O(+7)/O(+6), Mg/O, Ne/O, Fe charge states, He/p) observed by the ACE and WIND spacecraft within the ICMEs during 1996 - 2002 identsed by Cane and Richardson. We then develop a set of simple...
Topics: NASA Technical Reports Server (NTRS), CORONAL MASS EJECTION, SOLAR WIND, PLASMA COMPOSITION,...
A solar eruption that produces a coronal mass ejection (CME) together with a flare is driven by the eruption of a closed-loop magnetic arcade that has a sheared-field core. Before eruption, the sheared core envelops a polarity inversion line along which cool filament material may reside. The sheared-core arcade erupts when there is a breakdown in the balance between the confining downward-directed magnetic tension of the overall arcade field and the upward-directed force of the pent-up magnetic...
Topics: NASA Technical Reports Server (NTRS), CORONAL MASS EJECTION, MAGNETIC FIELDS, INVERSIONS, PRESSURE...
In this final technical report on research funded by a NASA grant, a project overview is given by way of summaries on nine published papers. Research has included: 1) Using suprathermal electron data to study heliospheric magnetic structures; 2) Analysis of magnetic clouds, coronal mass ejections (CME), and the heliospheric current sheet (HCS); 3) Analysis of the corotating interaction region (CIR) which develop from interactions between solar wind streams of different velocities; 4) Use of...
Topics: NASA Technical Reports Server (NTRS), HELIOSPHERE, MAGNETIC FIELD CONFIGURATIONS, ULYSSES MISSION,...
227
227
May 31, 2011
05/11
by
Zwally, H. J.; Beckley, M. A.; Brenner, A. C.; Giovinetto, M. B
texts
eye 227
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Slant range analysis of radar altimeter data from the Seasat, Geosat, ERS-1 and ERS-2 databases are used to determine barrier location at particular times, and estimate barrier motion (km/yr) for major Antarctic ice shelves. The barrier locations, which are the seaward edges or fronts of floating ice shelves, advance with time as the ice flows from the grounded ice sheets and retreat whenever icebergs calve from the fronts. The analysis covers various multiyear intervals from 1978 to 1998,...
Topics: FREE ENERGY, TIME DEPENDENCE, MAGNETIC FLUX, SOLAR ATMOSPHERE, SOLAR CORONA, SUN, SOLAR MAGNETIC...
This investigation is concerned with the large-scale evolution and topology of coronal mass ejections (CMEs) in the solar wind. During this reporting period we have focused on several aspects of CME properties, their identification and their evolution in the solar wind. The work included both analysis of Ulysses and ACE observations as well as fluid and magnetohydrodynamic simulations. In addition, we analyzed a series of "density holes" observed in the solar wind, that bear many...
Topics: NASA Technical Reports Server (NTRS), STELLAR EVOLUTION, TOPOLOGY, CORONAL MASS EJECTION, SOLAR...
In this paper, for a CME of the particular variety recently identified by Bemporad et al (2005), we present new evidence that strengthens the conclusion of Bemporad et al that for these CMEs the pre-eruption magnetic field that explodes to drive the CME is laterally far offset from the radial path of the full-blown CME in the outer corona. In CMEs of the particular variety of those found by Bemporad et al, the flare-site field that explodes is much more compact than the flare-site fields that...
Topics: NASA Technical Reports Server (NTRS), CORONAS, MAGNETIC FIELDS, FLARES, SOLAR FLARES, CORONAL MASS...
Coronal mass ejections (CMEs) corotating interaction regions (CIRs) are two large-scale structures that originate from the Sun and affect the heliosphere in general and Earth in particular. While CIRs are generally detected by in-situ plasma signatures, CMEs are remote-sensed when they are still close to the Sun. The current understanding of CMEs primarily come from the SOHO and STEREO missions. In spite of the enormous progress made, there are some serious deficiencies in these missions. For...
Topics: NASA Technical Reports Server (NTRS), SOLAR CYCLES, SOLAR OBSERVATORIES, SPACE MISSIONS, PAYLOADS,...
It is difficult to measure the true speed of Earth-directed CMEs from a coronagraph along the Sun-Earth line because of the occulting disk. However, the expansion speed (the speed with which the CME appears to spread in the sky plane) can be measured by such coronagraph. In order to convert the expansion speed to radial speed (which is important for space weather applications) one can use empirical relationship between the two that assumes an average width for all CMEs. If we have the width...
Topics: NASA Technical Reports Server (NTRS), CORONAL MASS EJECTION, STEREO (OBSERVATORY), CORONAGRAPHS,...
This lecture introduces the topic of Coronal mass ejections (CMEs) and solar flares, collectively known as solar eruptions. During solar eruptions, the released energy flows out from the Sun in the form of magnetized plasma and electromagnetic radiation. The electromagnetic radiation suddenly increases the ionization content of the ionosphere, thus impacting communication and navigation systems. Flares can be eruptive or confined. Eruptive flares accompany CMEs, while confined flares hav~ only...
Topics: NASA Technical Reports Server (NTRS), CORONAL MASS EJECTION, ELECTROMAGNETIC RADIATION, MAGNETIC...
