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163
Jul 6, 2010
07/10
by
MISHUSTIN, Y. N
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A CRITICAL REVIEW IS PRESENTED OF WORKS PUBLISHED BY THE M. I. VOLSKIY LABORATORY AND BY OTHERS ON THE ASSIMILATION OF NITROGEN BY THE HIGHER ORGANISMS OF MAN, ANIMALS, AND PLANTS. M. I. VOLSKIY TRIES TO PROVE THAT ALL ORGANISMS FIX MOLECULAR NITROGEN, REGARDLESS OF SYMBIOSIS WITH MICROORGANISMS. CRITICAL ANALYSIS REVEALS, HOWEVER, THAT SUCH STATEMENT IS UNFOUNDED. VOLSKIY'S EXPERIMENTS WERE NOT REPRODUCIBLE. M. I. VOLSKIY DOES NOT USE THE LITERATURE OBJECTIVELY AND IGNORES MATERIALS THAT ARE...
Topics: COMMUNICATION, IONOSPHERIC DISTURBANCES, GROUND STATIONS, IONOSPHERIC PROPAGATION
157
157
Jun 17, 2010
06/10
by
Carbenay, F
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Relationship between type IV chromospheric emissions and sudden ionospheric disturbances
Topics: AIRGLOW, CHROMOSPHERE, IONOSPHERIC DISTURBANCES, PERTURBATION, SUDDEN IONOSPHERIC DISTURBANCES,...
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162
Jul 5, 2010
07/10
by
Severnyy, A. B
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eye 162
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No Abstract Available
Topics: F REGION, GEOMAGNETISM, SPORADIC E LAYER, IONOSPHERIC DISTURBANCES
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
The SCINDA (AFRL's Scintillation Network Decision Aid) station at Calcutta (22.58 deg N, 88.38 deg E geographic; magnetic dip: 32 deg N) is situated in the geophysically sensitive Indian longitude sector virtually underneath the northern crest of the Equatorial Ionization Anomaly (EIA). The nearest SCINDA station on the west is located at Rajkot (22.50 deg N 70.78 deg E geographic) and on the east at Manila (14.58 deg N 121 deg E geographic). The station at Calcutta thereby forms an important...
Topics: DTIC Archive, CALCUTTA UNIV (INDIA), *IONOSPHERIC DISTURBANCES, INDIA, RECEIVERS, SCINTILLATION
171
171
Jul 5, 2010
07/10
by
Bitoun, J.; Lebeau, A
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eye 171
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No Abstract Available
Topics: IONOSPHERIC DISTURBANCES, LONG WAVE RADIATION, NIGHT SKY, CHROMOSPHERE, SOLAR FLARES
Developed novel multi-nesting, time splitting and implicit relaxation techniques for coupled three-dimensional mesoscale/microscale ionospheric dynamics; resolved secondary Rayleigh-Taylor instabilities and characterized turbulent dynamics of plasma bubbles/ionospheric layers. Created methods based on Lagrangian coherent structures delineating formation of scintillation producing irregularities, discovered fine scale irregularity patterns/plasma pancakes in ionospheric flows; described...
Topics: DTIC Archive, ARIZONA STATE UNIV TEMPE, *IONOSPHERIC DISTURBANCES, IONOSPHERIC MODELS
Analysis of GPS phase fluctuations in conjunction with regional total electron content (TEC) maps, insitu measurements of sub-auroral polarization streams (SAPS) and auroral convection from several DMSP spacecraft and dynasonde measurements at the Bear Lake Observatory obtained during the intense magnetic storm of November 8, 2004, have indicated the tremendous impact of large ionospheric velocities on GPS-based navigation systems within the mid-latitude region in the North American sector. The...
Topics: DTIC Archive, BOSTON UNIV MA CENTER FOR SPACE PHYSICS, *IONOSPHERIC DISTURBANCES
Various observational tools are available for the study of F-layer irregularities in the equatorial region. These include optical observations of the depletion of electron density (groundbased and spacebased), GPS phase fluctuations, DMSP and ROCSAT in situ observations of ion density depletions, radar observations of coherent backscatter from equatorial irregularities, and ionospheric soundings. Each makes contributions to observational studies and each has its limitations. Our long term goal,...
Topics: DTIC Archive, BOSTON UNIV MA CENTER FOR SPACE PHYSICS, *IONOSPHERIC DISTURBANCES
354
354
Jul 11, 2010
07/10
by
NON
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This compilation covers NASA and AEC developed techniques covering bonding, brazing, and joining methods and technology.
Topics: ASTROPHYSICS, MATERIALS SCIENCE, RESEARCH FACILITIES, CLOUD PHYSICS, COSMIC RAYS, IONOSPHERIC...
We have two long-term goals. The first goal is to understand the electrical properties of the upper atmosphere and space environment to better assist designers and users of space systems and technology. The second goal is to educate the next generation of leaders in space science and engineering.
Topics: DTIC Archive, CORNELL UNIV ITHACA NY SCHOOL OF ELECTRICAL AND COMPUTER ENGINEERING, *IONOSPHERIC...
Studies using all-sky imagers have revealed the presence of various ionospheric irregularities in the night-time mid-latitude F-region. The most prevalent and well known of these are the Medium Scale Traveling Ionospheric Disturbances (MSTIDs) that usually occur when the geomagnetic activity is low, and mid-latitude spread-F plumes that are often observed when the geomagnetic activity is high. The inverse and direct relations between geomagnetic activity (particularly Kp) and the occurrence...
Topics: NASA Technical Reports Server (NTRS), DEPLETION, F REGION, GEOMAGNETISM, SPREAD F, TEMPERATE...
259
259
Jun 21, 2010
06/10
by
Holman, E. V
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eye 259
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Design, development, and characteristics of latching mechanism for operation in limited access areas
Topics: GRAVITATIONAL WAVES, IONOSPHERIC PROPAGATION, SUDDEN IONOSPHERIC DISTURBANCES, F REGION, SPORADIC E...
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242
May 30, 2010
05/10
by
Swenson, G. W., Jr.; Yeh, K. C
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eye 242
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F region irregularities studied by scintillation of signals from satellites
Topics: F REGION, IONOSPHERIC DISTURBANCES, IRREGULARITIES, SATELLITE TRANSMISSION, SCINTILLATION, F LAYER,...
This work addresses some of the key topics of space physics research recommended in the National Research Council 2003 report A Decadal Research Strategy in Solar and Space Physics , namely, the thunderstorm-driven electrodynamic coupling between the troposphere, mesosphere, lower ionosphere, and magnetosphere. Lightning-induced electron precipitation encompasses all of these regions, from atmospheric and mesospheric electrodynamics, to radiation belt scattering, to precipitation and...
Topics: DTIC Archive, STANFORD UNIV CA STAR LAB, *IONOSPHERIC DISTURBANCES, LIGHTNING, OPTICAL PROPERTIES,...
291
291
Jul 11, 2010
07/10
by
VINNIKOV, Y. A
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eye 291
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PREVIOUS WORK CONDUCTED ON THE EVOLUTION OF THE MECHANISM OF GRAVITY RECEPTION IN INVERTEBRATES AND VERTEBRATES. THE STRUCTURE OF THIS MECHANISM IN VARIOUS ORGANISMS FROM PROTOZOA TO MOLLUSKS AND CRABS IS DESCRIBED BY MEANS OF NUMEROUS ELECTRON MICROSCOPIC PHOTOGRAPHS. ACCORDING TO THE ANALYSIS, THIS STRUCTURE WAS RETAINED IN THE VERTEBRATES, AND DEVELOPED APPARENTLY IN DIRECT RELATION TO THE COMPLEXITY OF THEIR MUSCULAR STRUCTURE AND INTERRELATION WITH THE EARTH'S GRAVITY. THE EFFECTS OF...
Topics: IONOSPHERIC DISTURBANCES, PLASMA-ELECTROMAGNETIC INTERACTION, RADIO AURORAS, ATMOSPHERIC MODELS,...
426
426
May 23, 2011
05/11
by
Donlon, Crai
texts
eye 426
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Quantitative predictions of spatial and temporal changes the global climate rely heavily on the use of computer models. Unfortunately, such models cannot provide the basis for climate prediction because key physical processes are inadequately treated. Consequently, fine tuning procedures are often used to optimize the fit between model output and observational data and the validation of climate models using observations is essential if model based predictions of climate change are to be treated...
Topics: PLANETARY IONOSPHERES, PLANETARY ATMOSPHERES, PLANETARY ATMOSPHERES, DATA COMPRESSION, MARS PROBES,...
Collective plasma phenomena induced in the ionospheric F-region by intense high-frequency radiation are examined on several time and length scales. The short wavelength, high-frequency turbulence associated with the observed high-frequency enhanced electron density fluctuations at the electron plasma frequency is shown to result from parametric excitation of plasma and acoustic waves by the high-frequency radiation. The wave kinetic equation describing the non-linear evaluation of the...
Topics: DTIC Archive, Perkins, Francis W, PRINCETON UNIV NJ, *IONOSPHERIC DISTURBANCES, IONOSPHERIC...
Reprint: Storm Time Electric Field Penetration Observed at Mid-Latitude.
Topics: DTIC Archive, Yeh, H -C, HAYSTACK OBSERVATORY WESTFORD MA, *MAGNETOSPHERE, *CONVECTION, IONOSPHERIC...
This report covers 1960-63 results on oblique incidence, satellite scintillation, D region scatter, shape of irregularities in D + E regions, flutter fading, and direct back-scatter from the F region.
Topics: DTIC Archive, Clemesha, B R, GHANA UNIV LEGON, *IONOSPHERIC DISTURBANCES, ELECTROMAGNETIC WAVE...
Contents include the following: Introduction. Programmatic aspects of RHA. RHA componens: requirements and specifications; mission radiation environment; and parts selection and radiation tolerance. Analysis at the function/subsystem/system level: TID/DD; SEE. Conclusion.
Topics: NASA Technical Reports Server (NTRS), RADIATION TOLERANCE, HARDNESS, ASSURANCE, AEROSPACE SYSTEMS,...
During the period of low solar activity at sunrise the effect of sporadic high frequency near Earth space radio emission was experimentally discovered at middle latitudes. The possible mechanism of its origin is discussed.
Topics: NASA Technical Reports Server (NTRS), CHROMOSPHERE, IONOSPHERIC DISTURBANCES, RADIO EMISSION, RADIO...
Reprint: Electrical Potential Patterns Deduced for the SUNDIAL period of 23-26 September 1986.
Topics: DTIC Archive, Emery, B A, SRI INTERNATIONAL MENLO PARK CA, *IONOSPHERIC DISTURBANCES, *POTENTIAL...
DESCRIPTORS: (*Economics, *Supplies, Distribution, *Mathematical analysis.)As a part of their extensive contractual effort in the area of economic inventory policies (EIP), Harbridge House of Boston, Massachusetts, studied inventory policies at the national or wholesale level. It was found that though the determination of operating levels is adequate, their approach to the determination of safety levels has several flaws making their recommended determination of safety levels inadequate....
Topics: DTIC Archive, RYBNER, JORGEN, TECHNICAL UNIV OF DENMARK COPENHAGEN, *IONOSPHERIC DISTURBANCES,...
Topics: DTIC Archive, DEPARTMENT OF COMMERCE WASHINGTON DC, *FORECASTING, *IONOSPHERIC PROPAGATION, LONG...
The memorandum investigates the steady-state perturbations of the ion and electron densities caused by a large-radius conducting disk moving through the ionosphere at a speed intermediate to the ion and electron thermal speeds. An approximation to the electron density in the region close behind the body is found by solving Poisson's equation, neglecting the ion density. For larger distances behind the body where the ion and electron densities are almost equal, an expression for the Fourier...
Topics: DTIC Archive, RAND CORP SANTA MONICA CA, *IONOSPHERE, *WAKE, ELECTRON DENSITY, IONOSPHERIC...
167
167
May 23, 2011
05/11
by
Goldmeer, Jeffrey S.; Yang, Chin-Tien; Urban, David L.; Tien, James S
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eye 167
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The combustion and extinction behavior of a solid polymethyl methacrylate (PMMA) cylinder in a low speed flow are examined both theoretically and experimentally.
Topics: PLANETARY SURFACES, SCALING LAWS, TRAVELING IONOSPHERIC DISTURBANCES, CRATERS, IMPACT ACCELERATION,...
Topics: DTIC Archive, ISTITUTO NAZIONALE DI GEOFISICA ROME (ITALY), *IONOSONDES, ITALY, ELECTROMAGNETIC...
Sporadic radio emission of near Earth space at the frequency of 38 MHz is shown to appear in the event of a rapid development of instabilities in the ionospheric plasma. The instabilities are generated due to primary ionospheric disturbances occurring under the influence of solar chromospheric flares.
Topics: NASA Technical Reports Server (NTRS), CHROMOSPHERE, IONOSPHERIC DISTURBANCES, IONOSPHERIC NOISE,...
The importance of ionospheric irregularities in the overall concept of dynamic ionospheric physics modeling is emphasized. In particular, ionospheric irregularities produce scintillation which cause communication and radar system degradation. The determination, classification and nonlinear development of such instabilities, in terms of theoretical and numerical studies, is of fundamental importance. This report gives an overview of ionospheric irregularities and specific results in two areas:...
Topics: DTIC Archive, Ossakow, S. L., NAVAL RESEARCH LAB WASHINGTON DC, *IONOSPHERIC DISTURBANCES, CLOUDS,...
LONG-TERM GOALS: Understanding physical processes that leads to plasma structuring in the equatorial, mid and high-latitude ionosphere. Identifying the effects of such variability, generally known as ionospheric space weather, on the operation of various communication, navigation and surveillance systems. OBJECTIVES: Establish major drivers that lead to structured ionospheric plasma in equatorial, mid and high-latitude regions. Investigate cascading of plasma structuring from large ( hundreds...
Topics: DTIC Archive, BOSTON UNIV MA CENTER FOR SPACE PHYSICS, *IONOSPHERE, *PLASMAS(PHYSICS), IONOSPHERIC...
Topics: DTIC Archive, WRIGHT, R W, AIR FORCE CAMBRIDGE RESEARCH LABS HANSCOM AFB MA, *IONOSPHERIC...
205
205
Jun 27, 2010
06/10
by
Stocky, J. F
texts
eye 205
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Mariner Mars 1971 orbiter propulsion subsystem for trajectory corrections, Mars orbit insertion, and orbit trim maneuvers
Topics: DIURNAL VARIATIONS, IONOSPHERIC DISTURBANCES, IONOSPHERIC ELECTRON DENSITY, IONOSPHERIC F-SCATTER...
199
199
Jul 11, 2010
07/10
by
ZASLAVSKAYA, N. I.; KVASHA, L. G
texts
eye 199
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SILICATES AND CHROMITE IN THE RELATIVELY RARE MULTI-MINERAL INCLUSIONS OF THE SIKHOTE-ALIN OCTAHEDRITE ARE STUDIED. UNDER X-RAY DIFFRACTION ANALYSIS, SEPARATE SILICATE GRAINS FROM THE THREE INCLUSIONS FOUND WERE SHOWN TO BE MOSTLY PYROXENE AS WELL AS OLIVINE. TABLES ARE INCLUDED GIVING X-RAY DIFFRACTION DATA (POWDER PATTERNS) FOR THE SILICATES AND CHROMITE OF THE INCLUSIONS.
Topics: MAGNETOSPHERIC INSTABILITY, MORTALITY, SOLAR ACTIVITY EFFECTS, STATISTICAL CORRELATION, GEOMAGNETIC...
Ionospheric scintillation analyses have been conducted on several fronts, and are discussed here in the light of: (1) recent observations, current theories, and coordinated studies of equatorial scintillations; (2) morphology and analytical formulas at high latitudes; (3) measurements associated with ionospheric heating. F-region irregularities are viewed from the concepts of localized origin of patches, in-situ spectral measurements, and coexistence of km- and m-scale irregularities. The...
Topics: DTIC Archive, EMMANUEL COLL BOSTON MASS PHYSICS RESEARCH DIV, EQUATORIAL REGIONS, ELECTRON DENSITY,...
Research during the period since 5/1/96 has focused on time frequency reconstruction and time varying imaging. The core of the space frequency algorithm, developed in year one, has been further refined. This algorithm has been tested on more robust sets of images and cases with simulated measurement noise. The results have been extremely positive. Future work will focus on making this core algorithm into a complete CIT algorithm. The other area of research has been in the development of the...
Topics: DTIC Archive, Na, Helen, IOWA UNIV IOWA CITY, *IONOSPHERIC DISTURBANCES, ALGORITHMS, SIMULATION,...
A study of the F-layer of the ionosphere made with an HF backscatter radar using a narrow-beam antenna has revealed a large number of irregularities in the size range from 50 to 500 km in north-south extent. It was possible to divide these irregularities into 5 types which were named spot, line, split, step, and range variable. On the basis of 60 one-hour records, the probability of the occurrence of each type was estimated (spot: 60%; split: 90%; others: less than 20% of the time). North-south...
Topics: DTIC Archive, STANFORD UNIV CA STANFORD ELECTRONICS LABS, *IONOSPHERE, *IONOSPHERIC DISTURBANCES,...
Reprint: Average Height-Integrated Joule Heating Rates and Magnetic Deflection Vectors Due to Field-Aligned Currents during Sunspot Minimum.
Topics: DTIC Archive, Rich, F J, PHILLIPS LAB HANSCOM AFB MA, *ENERGY TRANSFER, *SOLAR ACTIVITY,...
Exact solutions for the reflection and transmission coefficients are obtained for two general electron density distributions: kinked-trapezoid and exponential-homogeneous-exponential. Normal incidence into a stratified plasma slab is assumed so that the electromagnetic waves are propagating parallel to the free electron density gradients. A constant magnetic field is applied in the propagation direction. The solutions derived on this basis are used to evaluate the effect of the more realistic...
Topics: DTIC Archive, Gold, Richard R, AEROSPACE CORP EL SEGUNDO CA, *ELECTROMAGNETIC WAVE REFLECTIONS,...
184
184
Jul 11, 2010
07/10
by
BEREGOVOY, G. T.; KRYLOVA, N. V.; SOLOVYEVA, I. B.; SHIBANOV, G. P
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A THEORETICAL APPROACH TO THE EVALUATION OF A COSMONAUT'S PSYCHOLOGICAL RESERVES AND PSYCHOPHYSIOLOGICAL FUNCTIONING IN THE SPACE MAN-MACHINE SYSTEM IS OUTLINED. DUE TO THE GREATER INDEPENDENCE OF THE MAN-MACHINE SYSTEM IN SPACE, THE COSMONAUT MUST BE CAPABLE OF PERFORMING AS AN OBSERVER, OPERATOR, REPAIRMAN AND AS A WORKING RESERVE ON THE SPACECRAFT. THE IDEAL FUNCTION OF THE COSMONAUT IN THE LATTER THREE ROLES IS DESCRIBED IN TERMS OF FOUR BASIC STEPS USED IN HUMAN FACTORS ENGINEERING:...
Topics: RADIO SIGNALS, SOLAR FLARES, SUDDEN IONOSPHERIC DISTURBANCES, VERY LOW FREQUENCIES, OMEGA...
165
165
Jun 18, 2010
06/10
by
Vinogradov, Yu. I.; Yeryushev, N. N
texts
eye 165
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Correlation between X-ray emission of flares originating behind solar disk and occurrence of sudden ionospheric disturbances
Topics: EMISSION, X-RAY, OCCURRENCES, SOLAR FLARES, SUDDEN IONOSPHERIC DISTURBANCES, SUN, X RAYS, EMISSION,...
Recently interest has grown in the study of dayside magnetic impulse events observed at high latitude ground stations. These signals may be signatures of dayside magnetopause processes in the ionosphere. Successful identification of the ground signature of any process means that its contribution to the magnetospheric environment can be monitored with ground stations. Recent work has focused on signals that are expected to accompany mesoscale field-aligned currents moving through the ionosphere....
Topics: DTIC Archive, Krajnak, Michael D, CALIFORNIA UNIV LOS ANGELES, *MAGNETOSPHERE, *IONOSPHERIC...
Hydromagnetic waves associated with Pc 1 geomagnetic micropulsations travelling the ionosphere should produce small ionospheric electrondensity fluctuations. A search was made for such fluctuations using a ground-based HF sounding technique, but none were detected. This result is discussed in terms of the maximum fluctuation amplitude expected and the limitations on experimental sensitivity.
Topics: DTIC Archive, Dingle, Bruce, STANFORD UNIV CA STANFORD ELECTRONICS LABS, *IONOSPHERIC DISTURBANCES,...
The Northern Hemisphere 700 mb contour heights from 20 N to 70 N for the period 1947-1970 are studied in conjunction with 272 key days, where the daily increase of the Ci index equals or exceeds 1.0. The superposed epoch method is applied from 33 days before to 66 days after the key day for a variety of zonal and meridional indices. It is shown that the 700 mb height difference between 20 N and 55 N increases significantly in winter 4 days following geomagnetic disturbance (in summer a less...
Topics: NASA Technical Reports Server (NTRS), GEOMAGNETISM, IONOSPHERIC DISTURBANCES, ATMOSPHERIC...
Topics: DTIC Archive, FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH, *IONOSPHERIC DISTURBANCES, WEATHER...
We present an analytical expression for the growth rate of the E X B instability in the long wavelength limit, i.e., k sub y L sub n always less than 1, where k sub y is the wavenumber and L sub n is the scale length of the density gradient. Specifically, we obtain results for the case of a single discontinuity in plasma density. (Author)
Topics: DTIC Archive, Huba,J D, NAVAL RESEARCH LAB WASHINGTON DC, *IONOSPHERIC DISTURBANCES, STABILITY, F...
Electron parallel dynamics and Coulomb collisions are included in the analysis of the transverse Kelvin-Helmholtz instability. The electrons are treated kinetically while the ions are treated in the fluid limit. It is shown that, in the collisionless case, for an in homogeneous velocity profile v(x)=v sub tanh (x/L the kelvin-Helmholtz instability is stable for k sub z/k sub y v sub 0)/(L omega sub lh)) k u L(1-k y sq rt in the limit w-ky v sub 0 k sube x V sube e. Here V sub o is the flow...
Topics: DTIC Archive, Satyanarayana,P, SCIENCE APPLICATIONS INTERNATIONAL CORP MCLEAN VA, *IONOSPHERIC...
Topics: DTIC Archive, Makhlouf, U, AIR FORCE SYSTEMS COMMAND HANSCOM AFB MA GEOPHYSICS LAB, *AIR FLOW,...
Build a compatible set of models which 1) calculate the spectrum of atmospheric GWs excited by a tsunami (using ocean model data as input), 2) propagate these GWs into the thermosphere, and 3) reconstruct the GW field in the thermosphere (e.g., neutral wind, density and temperature perturbations caused by the GWs) as a function of space and time at the altitudes z=200-300 km. These perturbations will then be given to Dr. Makela to calculate the 630 nm airglow and ionospheric response to these...
Topics: DTIC Archive, NORTHWEST RESEARCH ASSOCIATES INC BELLEVUE WA, *GRAVITY WAVES, *IONOSPHERIC...
Coordinated measurements of equatorial spread-F conducted during July 1979 at the Kwajalein Atoll have yielded the first definitive space and time coincident radar and rocket observations of small scale irregularities and large scale plasma depletions. The results have shown that: (a) Within a large-scale topside F-layer depletion radar backscatter energy is at a level much lower than that observed on the depletion's topside. The same is true of 'in situ' irregularity observations, and (b) Ion...
Topics: DTIC Archive, Szuszczewicz,E P, NAVAL RESEARCH LAB WASHINGTON DC, *F REGION, *IONOSPHERIC...
