136
136
May 27, 2011
05/11
by
Hollingsworth, Jeffery L.; Bridger, Alison F. C.; Haberle, Robert M
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This is a Final Report for a Joint Research Interchange (JRI) between NASA Ames Research Center and San Jose State University, Department of Meteorology. Using a global atmospheric circulation model for Mars, the focus of this JRI has been to provide support for the Mars Global Surveyor (MGS) spacecraft aerobraking activities and interpretation guidance of preliminary observations. The primary atmospheric model applied in this investigation has been a high-top version of the NASA Ames Mars...
Topics: IONOSPHERIC DISTURBANCES, ATMOSPHERIC SOUNDING, EARTH IONOSPHERE, MOSCOW, IONOSPHERIC STORMS
141
141
Jul 5, 2010
07/10
by
Gordeyeva, T. A.; Muller, M. P
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eye 141
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No Abstract Available
Topics: EARTH IONOSPHERE, SOLAR ECLIPSES, DIURNAL VARIATIONS, ELECTRON DENSITY (CONCENTRATION), U.S.S.R.
210
210
May 6, 2010
05/10
by
Quinn, T. P
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eye 210
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Recombination and transport in nighttime f layer of ionosphere
Topics: EARTH IONOSPHERE, F REGION, NIGHT, NIGHT SKY, F LAYER, NIGHT IONOSPHERE
The third Progress In Electromagnetics Research Symposium (PIERS) was held 12-16 Jul. 1993, at the Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California. More than 800 presentations were made, and those abstracts are included in this publication.
Topics: NASA Technical Reports Server (NTRS), ABSTRACTS, CONFERENCES, ELECTRICAL ENGINEERING,...
326
326
Jul 6, 2010
07/10
by
BECKER, W
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THE REDUCTION AND COMPILATION OF ALL BRIGHTNESS OBSERVATIONS FOR THE PLANETS SATURN AND URANUS KNOWN SINCE 1852 WERE ANALYZED. THE PHYSICAL LIGHT VARIATION FOR SATURN WAS NUMERICALLY ANALYZED AND THE RESULTS ARE PRESENTED. IN THE CASE OF URANUS THERE IS A SUPERPOSITION OF THE AMPLITUDE VARIATION OF A PERIOD OF 82 YEARS WITH A PHYSICAL LIGHT VARIATION WHICH FOLLOWS A SINUSOIDAL COURSE AND WHOSE PERIOD FLUCTUATES BETWEEN 5.5 AND 11.5 YEARS. ESPECIALLY LOW MINIMA COINCIDE IN THE CASES OF SATURN...
Topics: COSMOS SATELLITES, EARTH IONOSPHERE, INFRARED RADIATION, DISTRIBUTION (PROPERTY), THERMAL...
238
238
Jun 21, 2010
06/10
by
Cain, S. J.; Sugiura, M
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eye 238
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Provisional hourly values of equatorial Dst for 1968
Topics: CHARGE DISTRIBUTION, COSMIC RAYS, EARTH IONOSPHERE, HEAVY NUCLEI, NUCLEAR EMULSIONS, IONIZATION,...
439
439
Jun 21, 2010
06/10
by
NON
texts
eye 439
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System analysis of gelled space storable propellants
Topics: EARTH IONOSPHERE, SOLAR CORPUSCULAR RADIATION, ABSORPTION SPECTRA, CHARGED PARTICLES, CHEMICAL...
282
282
Sep 20, 2010
09/10
by
NON
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eye 282
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A device and method are provided which non-destructively detect crack length and crack geometry in thin metallic plates. A non-contacting vibration apparatus produces resonant vibrations without introducing extraneous noise. Resulting resonant vibration shifts in cracked plates are correlated to known crack length in plates with similar resonant vibration shifts. In addition, acoustic emissions of cracks at resonance frequencies are correlated to acoustic emissions from known crack geometries.
Topics: ATMOSPHERIC PHYSICS, PROJECT PLANNING, SOLAR PHYSICS, SUBDIVISIONS, EARTH IONOSPHERE, EARTH...
183
183
Jul 11, 2010
07/10
by
BARTH, A.; SCHULZ, H.; NEUBERT, K
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eye 183
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IN THE MICROSOMAL OF PIG KIDNEYS, ASIDE FROM PARTICLE-BOUND AMINOPEPTIDASE (EC 3.4.1.2), A DIPEPTIDYL AMINOPEPTIDASE IS OBSERVED WHICH, UPON SOLUBILIZATION, FRACTIONATED AMMONIUM SULFATE PRECIPITATION AND COLUMN CHROMATOGRAPHY, CAN BE SEPARATED FROM THE AMINOPEPTIDASE, AND ISOLATED PURELY BY DISC ELECTROPHORESIS. IT IS ASSUMED THAT DIPEPTIDYL AMINOPEPTIDASE IV POSSESSES TWO DIFFERENT SPECIFITIES FOR SUBSTRATES WITH THE SEQUENCE L-AS-L ALA-R, AND FOR SUBSTRATES WITH THE SEQUENCE L-AS-L-PRO-R....
Topics: EARTH IONOSPHERE, RADIO NAVIGATION, TIME LAG, TIME MEASUREMENT, ATS, ELECTRONS, FARADAY EFFECT,...
223
223
Jul 5, 2010
07/10
by
Riotte, A
texts
eye 223
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No Abstract Available
Topics: EARTH IONOSPHERE, ELECTROSTATIC CHARGE, FIELD STRENGTH, ROCKET FLIGHT, MAGNETIC MEASUREMENT,...
159
159
May 23, 2011
05/11
by
Mercer, C. R.; Rashidnia, N.; Creath, K
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A new optical instrument, the liquid crystal point diffraction interferometer (LCPDI), is used to measure the temperature distribution across a heated chamber filled with silicone oil. Data taken using the LCPDI are compared to equivalent measurements made with a traversing thermo-couple and the two data sets show excellent agreement. This instrument maintains the compact, robust design of Linniks point diffraction interferometer and adds to it phase stepping capability for quantitative...
Topics: EARTH IONOSPHERE, STATIC ELECTRICITY, LIGHTNING, ION CONCENTRATION, LIGHTNING SUPPRESSION,...
334
334
May 31, 2011
05/11
by
Abbaschian, Reza; deGroh, Henry C., III; Leonardi, E.; deVahlDavis, Graham; Coriell, Sam; Cambon, Gerar
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This reports on the MEPHISTO-4 experiment on the Space Shuttle Columbia, STS-87, November 19-December 5, 1997. Involved were NASA; the University of Florida at Gainesville; groups from France that developed and built the furnace; the National Institute of Standards and Technology; The University of New South Wales, Australia; and Purdue University. This was a solidification study in which three long rods of Bismuth- 1 at. Tin were directionally solidified. The goals were to solidify in an...
Topics: EARTH IONOSPHERE, IONOSPHERIC STORMS, THERMOSPHERE, IONOSPHERIC ELECTRON DENSITY, DENSITY...
426
426
Jul 23, 2010
07/10
by
Kudrazasher, L. I
texts
eye 426
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No Abstract Available
Topics: EARTH IONOSPHERE, SIGNAL REFLECTION, WAVE INTERACTION, WAVE PROPAGATION, ELECTROMAGNETIC FIELDS,...
428
428
May 30, 2010
05/10
by
Etcheto, J.; Sterne, J
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eye 428
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Diurnal variations of two orthogonal magnetic components of earth ionosphere cavity
Topics: CAVITIES, IONOSPHERE, What -- Earth, DIURNAL VARIATIONS, EARTH IONOSPHERE, GEOMAGNETISM, MAGNETIC...
The mid-latitude ionospheric and neutral atmospheric models are coupled with an advanced three dimensional ray tracing program to see what success would be obtained in predicting the wave propagation conditions and to study to what extent the use of theoretical ionospheric models is practical. The Penn State MK 1 ionospheric model, the Mitra-Rowe D region model, and the Groves' neutral atmospheric model are used throughout this work to represent the real electron densities and collision...
Topics: NASA Technical Reports Server (NTRS), ATMOSPHERIC MODELS, EARTH IONOSPHERE, D REGION, DOPPLER...
Studies have covered a wide range of problems in the space environment, such as the problems of the dynamical behavior of the thermosphere, hydromagnetic wave propagation in the ionosphere, and interplanetary space environment. The theories used to analyze these problems range from a continuum theory of magnetohydrodynamics to the kinetic theory of free molecular flow. This is because the problems encountered covered the entire range of the Knudsen number (i.e., the ratio of mean free path to...
Topics: NASA Technical Reports Server (NTRS), AEROSPACE ENVIRONMENTS, DYNAMIC CHARACTERISTICS, EARTH...
832
832
Jul 11, 2010
07/10
by
NON
texts
eye 832
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Various articles are presented on multiple scattering problems and radiative transfer in the atmosphere. Particle size distribution and molecular absorption are also discussed.
Topics: EARTH IONOSPHERE, RADIO WAVES, STRATOSPHERE, VERY LOW FREQUENCIES, WAVE PROPAGATION, DATA...
226
226
Jun 1, 2010
06/10
by
Antonova, L. A.; Ivanov-Kholodnyy, G. S
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Corpuscular hypothesis for ionization of night ionosphere - electron concentration in F layer
Topics: EARTH IONOSPHERE, NIGHT IONOSPHERE, ELECTRON DENSITY (CONCENTRATION), F REGION, HYPOTHESES,...
Unlike all man made detectors, which are only sensitive to relative narrow regions of the electromagnetic spectrum, the ionosphere is practically a perfect detector for high energy radiation because it absorbs all radiation from the far-ultraviolet to the higher energy gamma-rays. Therefore, it may be possible to employ the terrestrial atmosphere as a detector of high energy celestial photons. As early as the 1940's solar flares were detected by the disturbance they caused to the ionosphere....
Topics: NASA Technical Reports Server (NTRS), DETECTION, EARTH IONOSPHERE, EARTH-IONOSPHERE WAVEGUIDE,...
278
278
Jun 1, 2010
06/10
by
Pokhunkov, A. A
texts
eye 278
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Gravitational separation, composition, and structural parameters of night upper atmosphere
Topics: ATMOSPHERIC COMPOSITION, GRAVITY, NIGHT IONOSPHERE, EARTH IONOSPHERE, GRAVITATION, NIGHT, NIGHT...
The annual IRI Task Force Activity was held at the Abdus Salam International Center for Theoretical Physics in Trieste, Italy from July 10 to July 14. The participants included J. Adeniyi (University of Ilorin, Nigeria), D. Bilitza (NSSDC/RITSS, USA), D. Buresova (Institute of Atmospheric Physics, Czech Republic), B. Forte (ICTP, Italy), R. Leitinger (University of Graz, Austria), B. Nava (ICTP, Italy), M. Mosert (University National Tucuman, Argentina), S. Pulinets (IZMIRAN, Russia), S....
Topics: NASA Technical Reports Server (NTRS), ORGANIZATIONS, EARTH IONOSPHERE, VARIABILITY, ELECTRON...
During this current reporting period, the project has focused on completing Phase 1 of the field monitoring work and documenting research results. Highlights of these efforts include presentations of papers at the annual joint meeting of the American Physical Society/American Association of Physics Teachers, April 18-22, 1994, in Crystal City, Virginia, and at the International Space, Time, and Gravitation Conference and Etoiles de L'Ecole Polytechnique Symposium, May 23-28, 1994, in St....
Topics: NASA Technical Reports Server (NTRS), BACKGROUND RADIATION, EARTH IONOSPHERE, EXTREMELY LOW...
In June, 1989, the Space Science and Applications Advisory Committee (SSAAC) authorized its Space Physics Subcommittee (SPS) to prepare a plan specifying the future missions, launch sequence, and encompassing themes of the Space Physics Division. The plan, now complete, is the product of a year-long study comprising two week-long workshops - in January and June 1990 - assisted by pre-workshop, inter-workshop, and post-workshop preparation and assessment activities. The workshops engaged about...
Topics: NASA Technical Reports Server (NTRS), ATMOSPHERIC PHYSICS, PROJECT PLANNING, SOLAR PHYSICS,...
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234
Jun 21, 2010
06/10
by
NON
texts
eye 234
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Network allocation schedules and Mariner Mars 1971 mission support in Deep Space Network
Topics: ELECTROMAGNETIC NOISE, PROPAGATION VELOCITY, ELECTRON BEAMS, HYDRODYNAMICS, LIOUVILLE EQUATIONS,...
The Community College Division is pleased to report progress of NASA funded research at West Virginia State College. During this reporting period, the project research group has continued with activities to develop instrumentation capability designed to monitor resonant cavity frequencies in the atmospheric region between the Earth's surface and the ionosphere. In addition, the project's principal investigator, Dr. Craig Spaniol, and NASA technical officer, Dr. John Sutton, have written and...
Topics: NASA Technical Reports Server (NTRS), EARTH IONOSPHERE, EDUCATION, RESONANT FREQUENCIES, STUDENTS,...
The objectives are presented to compare and compute ionospheric quantities and airglow emission.
Topics: NASA Technical Reports Server (NTRS), AIRGLOW, CUSPS (LANDFORMS), EARTH IONOSPHERE, ELECTRON...
EXOS is the charged-particle spectrometer on EXOCUBE that will measure the H/He/O and H+ /He+ /0+ densities and temperatures in the exosphere. Its basic approach is based on WINCS; however, EXOS gave the impetus for improvements that led to the 2nd generation WINCS. Beginning with a brief description of the WINCS methodology for ionosphere-thermosphere measurements, lessons learned from the first generation WINCS are summarized as introduction to the design of EXOS. The EXOS design is then...
Topics: NASA Technical Reports Server (NTRS), CHARGED PARTICLES, ION DENSITY (CONCENTRATION),...
898
898
May 23, 2011
05/11
by
NON
texts
eye 898
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The purpose of this Historically Black Colleges and Universities (HBCUS) Research Conference was to provide an opportunity for principal investigators and their students to present research progress reports. The abstracts included in this report indicate the range and quality of research topics such as aeropropulsion, space propulsion, space power, fluid dynamics, designs, structures and materials being funded through grants from Lewis Research Center to HBCUS. The conference generated...
Topics: ATMOSPHERIC MODELS, EARTH IONOSPHERE, POSEIDON SATELLITE, GLOBAL POSITIONING SYSTEM, ALTIMETERS,...
The Geospace Electrodynamic Connections (GEC) mission is a multispacecraft Solar-Terrestrial Probe that has been specifically designed to advance the level of physical insight of our understanding of the coupling among the ionosphere, thermosphere, and magnetosphere. GEC is NASA's fifth Solar-Terrestrial Probe. Through multipoint measurements in the Earth's ionosphere-thermosphere (I-T) system, GEC will (i) discover the spatial and temporal scales on which magnetospheric energy input into the...
Topics: NASA Technical Reports Server (NTRS), EARTH IONOSPHERE, PLASMA INTERACTIONS, THERMOSPHERE, SPACE...
Research consisted of computations toward the solution of the problem of the current distribution on a cylindrical antenna in a magnetoplasma. The case of an antenna parallel to the applied magnetic field was investigated. A systematic method of asymptotic expansion was found which simplifies the solution in the general case by giving the field of a dipole even at relatively short range. Some useful properties of the dispersion surfaces in a lossy medium have also been found. A laboratory...
Topics: NASA Technical Reports Server (NTRS), ANTENNA RADIATION PATTERNS, PLASMAS (PHYSICS), WAVE...
A number of general studies that were proposed for the PPEPL-SHUTTLE program are considered in qualitative detail from both the theoretical and practical points of view. The selection of experimental programs was restricted to those which may be considered active as opposed to refinements of the passive observational programs done previously. It is concluded that, while these new studies were scientifically worthwhile and could be performed in principle, in most cases insufficient attention was...
Topics: NASA Technical Reports Server (NTRS), PLASMA PHYSICS, QUALITATIVE ANALYSIS, RESEARCH MANAGEMENT,...
At NASA, GPS is a vital resource for scientific research aimed at understanding and protecting Earth. The Agency employs the band of GPS satellites for such functions as mapping Earth s ionosphere and developing earthquake-prediction tools. Extending this worldly wisdom beyond Earth, NASA researchers are even discussing the possibility of developing global positioning satellites around Mars, in anticipation of future manned missions. Despite all of its terrestrial accomplishments, traditional...
Topics: NASA Technical Reports Server (NTRS), GLOBAL POSITIONING SYSTEM, NAVIGATION SATELLITES, EARTH...
Topics: NASA Technical Reports Server (NTRS), EARTH IONOSPHERE, ESA SATELLITES, ION DENSITY...
During geomagnetic storms, which are initiated by solar disturbances, two cells of circulatory motion are established in the polar ionosphere. The torques that contribute to either cell might be as great as 10 to the 24 power dyne cm, and may persist for times of the order 100,000 sec. The angular momentum contributed to a cell may be as great as 10 to the 29th power g sq cm/sec. Angular momentum is discussed.
Topics: NASA Technical Reports Server (NTRS), ATMOSPHERIC CIRCULATION, POLAR REGIONS, SOLAR ACTIVITY,...
There are significant fundamental problems for which aeronomy can provide solutions and a critical role in applied science and space weather that only aeronomy can address. Examples of unresolved problems include the interaction of neutral and charged, the role of mass and energy transfer across Earth's interface with space, and the predictability of ionospheric density and composition variability. These and other problems impact the productivity of space assets and thus have a tangible applied...
Topics: NASA Technical Reports Server (NTRS), AERONOMY, SPACE WEATHER, ATMOSPHERIC PHYSICS, UPPER...
This issue of Advances in Space Research presents a selection of papers that document the progress in developing and improving the International Reference Ionosphere (IRI), a widely used standard for the parameters that describe the Earths ionosphere. The core set of papers was presented during the 2010 General Assembly of the Committee on Space Research in Bremen, Germany in a session that focused on the representation of the auroral and polar ionosphere in the IRI model. In addition, papers...
Topics: NASA Technical Reports Server (NTRS), AURORAS, EARTH IONOSPHERE, POLAR REGIONS, AURORAL ZONES,...
Research in earth resources, meteorology, and interplanetary physics - symposium
Topics: NASA Technical Reports Server (NTRS), CONFERENCES, COSMIC DUST, EARTH RESOURCES, METEOROLOGY, EARTH...
The flow of weakly ionized plasmas that is similar to the flow that occurs over rocket-borne blunt probes as they pass through the lower ionosphere has been simulated in a scaled laboratory environment, and electron collection D region blunt probe theories have been evaluated.
Topics: NASA Technical Reports Server (NTRS), COMPUTERIZED SIMULATION, EARTH IONOSPHERE, PLASMAS (PHYSICS),...
Research in atmospheric physics leading to the identification of the metastable states of nitrogen is described. These forbidden nitrogen atomic molecular radiations were then identified in auroral spectra.
Topics: NASA Technical Reports Server (NTRS), ATMOSPHERIC PHYSICS, AURORAL SPECTROSCOPY, HISTORIES,...
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210
Jun 2, 2011
06/11
by
Oreopoulos, L.; Chou, M.-D.; Khairoutdinov, M.; Barker, H. W.; Cahalan, R. F
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eye 210
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We test the performance of the shortwave (SW) and longwave (LW) Column Radiation Models (CORAMs) of Chou and collaborators with heterogeneous cloud fields from a global single-day dataset produced by NCAR's Community Atmospheric Model with a 2-D CRM installed in each gridbox. The original SW version of the CORAM performs quite well compared to reference Independent Column Approximation (ICA) calculations for boundary fluxes, largely due to the success of a combined overlap and cloud scaling...
Topics: RADIO ALTIMETERS, EARTH IONOSPHERE, SPACECRAFT DESIGN, TEMPERATURE CONTROL, SPECIFICATIONS, TOPEX,...
Treated jointly, two recent results imply that the distribution of winds in the polar ionosphere should change as a function of the direction of the interplanetary magnetic field. (1) From the motions of chemically released ion and neutral clouds, it is apparent that neutral winds in the high latitude ionosphere are driven principally by ion drag forces. (2) OGO-6 electric field measurements have demonstrated that there are definite relationships between the time-latitude distribution of...
Topics: NASA Technical Reports Server (NTRS), EARTH IONOSPHERE, INTERPLANETARY MAGNETIC FIELDS, SOLAR WIND,...
Chemical processes in the thermosphere and ionosphere using AE data were studied. These data were analyzed and interpreted in such a way as to verify and correct laboratory measured rate coefficients, obtain values for rate coefficients not measured in the laboratory, and to reveal and correct inadequacies in existing models of thermospheric chemistry. This activity stimulated new work in the laboratory measurement of rate coefficients by revealing errors in existing measurements and by...
Topics: NASA Technical Reports Server (NTRS), AERONOMY, EARTH IONOSPHERE, THERMOSPHERE, CHEMICAL...
The development and use of sounding rockets is traced from the Wac Corporal through the present generation of rockets. The Goddard Space Flight Center Sounding Rocket Program is discussed, and the use of sounding rockets during the IGY and the 1960's is described. Advantages of sounding rockets are identified as their simplicity and payload simplicity, low costs, payload recoverability, geographic flexibility, and temporal flexibility. The disadvantages are restricted time of observation,...
Topics: NASA Technical Reports Server (NTRS), NASA PROGRAMS, SOUNDING ROCKETS, ATMOSPHERIC PHYSICS, EARTH...
This report provides progress to test the predictions of substorm models using ISTP observations. During the first year, two investigations were initiated in collaboration with a number of ISTP researchers. Both investigations use a combination of simultaneous measurements from high-, low-, and ground-altitude instruments to: (1) explore the role of MHD resonances in the onset and evolution of substorms, and (2) establish the timing of events in the magnetosphere and ionosphere during the...
Topics: NASA Technical Reports Server (NTRS), MAGNETOHYDRODYNAMICS, MAGNETIC STORMS, STORMS (METEOROLOGY),...
The reciprocity between high power satellite antennas and the surrounding plasma are examined. The relevant plasma states for antenna impedance calculations are presented and plasma models, and hydrodynamic and kinetic theory, are discussed. A theory from which a variation in antenna impedance with regard to the radiated power can be calculated for a frequency range well above the plasma resonance frequency is give. The theory can include photo and secondary emission effects in antenna...
Topics: NASA Technical Reports Server (NTRS), EARTH IONOSPHERE, IMPEDANCE, PLASMA SHEATHS, SATELLITE...
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196
May 21, 2011
05/11
by
Fuechsel, Charles F
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It is a great privilege for me to address my colleagues at SpaceOps 92. Today, I would like to share with you some current directions we are pursuing in NASA's Office of Space Communications (OSC). The space agencies of the world have produced some remarkable achievements in conducting our missions. It is also true that we consume significant resources in controlling and operating our spacecraft. In these challenging economic times, the degree to which our agencies can develop new missions will...
Topics: AURORAL ZONES, LANDAU DAMPING, OSCILLATIONS, EARTH IONOSPHERE, ELECTRIC FIELDS, ELECTRON...
We examined the various likely processes for creating the cavities and found that the mirror force acting on the transversely heated ions is the most likely mechanism. The pondermotive force causing the wave collapse was found to be a much weaker force than the mirror force on the transversely heated ions observed inside the cavities along with the lower hybrid waves. Using a hydrodynamic model for the polar wind we modeled the cavity formation and found that for the heating rate obtained from...
Topics: NASA Technical Reports Server (NTRS), EARTH IONOSPHERE, IONOSPHERIC HEATING, IONS, PLASMA HEATING,...
Two techniques, tracking the motions of Ba(+) clouds and measuring the differences in floating potential between symmetric double probes, were successful in: (1) demonstrating the basic convective nature of magnetospheric electric fields, (2) mapping global patterns of convection at upper ionosphere levels, and (3) revealing the physics of electric currents in the ionosphere and the importance of magnetosphere-ionosphere feedback in altering the imposed convection.
Topics: NASA Technical Reports Server (NTRS), BARIUM, EARTH MAGNETOSPHERE, ELECTRIC FIELDS, ELECTRIC...
Relatively little is known about the cavity between the Earth and the ionosphere, which opens opportunities for technological advances and unique ideas. One effective means to study this cavity is with extremely low frequency (ELF) antennas. Possible applications of these antennas are global weather prediction, earthquake prediction, planetary exploration, communication, wireless transmission of power, or even a free energy source. The superconducting quantum interference device SQUID) and the...
Topics: NASA Technical Reports Server (NTRS), EARTH IONOSPHERE, ANTENNAS, EXTREMELY LOW FREQUENCIES, SIGNAL...
Abstracts of publications in plasma physics are presented including theoretical and ionospheric research.
Topics: NASA Technical Reports Server (NTRS), ABSTRACTS, PLASMA PHYSICS, EARTH IONOSPHERE, RESEARCH AND...
