| A Synthetic Environment for Satellite Modeling and Satellite Orbital Motion |
DEC 92 |
54 pages |
| Authors:
David L. Pond; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING
|
 | Analysts tasked to study satellites moving in space must often rely on photographs to conduct their analysis. Often these photographs do not adequately represent how satellites move in space, their spatial relationships, or their interaction with other satellites. What analysts need is a three- dimensional synthetic environment that depicts satellites as they actually move and interact in space. This thesis addresses the early development of the Satellite Modeler (SM), a ... |
|
| High Resolution Measurements of Mixing and Reaction Processes in Turbulent Flows |
10 NOV 92 |
34 pages |
| Authors:
Werner J. Dahm; MICHIGAN UNIV ANN ARBOR GAS DYNAMICS LABS
|
| High resolution multi-dimensional imaging measurements were reported of the detailed structure of mixing and combustion processes in turbulent flows. These measurements are unique because they provide the first fully-resolved quantitative data on scalar dissipation rate field structure in turbulent reacting flows. These molecular mixing rate data were coupled with a two- parameter non-equilibrium reaction chemistry formulation to generate instantaneous maps of combustion species concentration and reaction rate fields in turbulent ... |
|
| Cooled Ion Frequency Standard (FY92) |
22 OCT 92 |
10 pages |
| Authors:
D. J. Wineland; NATIONAL INST OF STANDARDS AND TECHNOLOGY BOULDER CO TIME AND FREQUENCY DIV
|
| The purpose of this work is to develop techniques to overcome the fundamental limits of present frequency standards--the second order and residual first-order Doppler shifts. To this end we study suitable frequency reference transitions in ions which are stored on electromagnetic traps and cooled by radiation pressure to less than 1K.... Atomic spectroscopy, Doppler narrowing, Doppler shifts, Frequency standards, High resolution spectroscopy, Ion storage, Laser spectroscopy, Penning trap, Laser cooling. ... |
|
| Fast High-Resolution Techniques Applied to the Direction of Arrival (DOA) of Signals Problem |
SEP 92 |
112 pages |
| Authors:
Milton P. Ferreira; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Subspace decomposition methods are a very useful technique to extract the signal information via eigen-based estimators. Although those techniques are very accurate, they are usually expensive to update, becoming difficult to implement for real-time applications. The Rank-Revealing QR (RRQR) factorization introduced by Chan, offers an attractive alternative to perform the subspace selection. In this work, we use the RRQR algorithm applied to the Direction of Arrival (DOA) problem to track ... |
|
| High-Resolution Array with Prony, MUSIC, and ESPRIT Algorithms |
25 AUG 92 |
77 pages |
| Authors:
B. T. Root; NAVAL RESEARCH LAB WASHINGTON DC
|
| This report investigates the array high-resolution properties of three algorithms: the Prony algorithm the MUSIC algorithm, and the ESPRIT algorithm. MUSIC has been much studied due to its excellent high-resolution properties in all but the most correlated cases. A variation of it called spatially averaged MUSIC performs well even in the case of perfectly correlated signals. The Prony technique has been less studied in an array processing context, but is ... |
|
| Upper-Tropospheric Forcing of the Intensification Rates of Tropical Cyclones Flo and Ed Based on TCM-90 Observations |
JUN 92 |
202 pages |
| Authors:
Jeff H. Rucker; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| A case study of the upper-tropospheric forcing of the intensification rates of typhoons Flo and Ed has been accomplished. High-resolution, hand-drawn streamline analyses of the 150, 200, 250, and 300 mb winds from the final observational data set of the Tropical Cyclone Motion (TCM-90) field experiment were constructed for 00, 06, 12, and 18 UTC during the period 00 UTC 12 September through 00 UTC 19 September 1990. Three basic ... |
|
| High Resolution Spectroscopy of 1,2-Difluoroethane in a Molecular Beam: A Case Study of Vibrational Mode-Coupling |
29 MAY 92 |
49 pages |
| Authors:
Steven M. Mork; C. C. Miller; Laura A. Philips; CORNELL UNIV ITHACA NY DEPT OF CHEMISTRY
|
| The high resolution infrared spectrum of 1,2-difluoroethane (DFE) in a molecular beam has been obtained over the 2978-2996 cm-1 spectral region. This region corresponds to the symmetric combination of asymmetric C-H stretches in DFE. Observed rotational fine structure indicates that this C-H stretch is undergoing vibrational mode coupling to a single dark mode. The dark mode is split by approximately 19 cm-1 due to tunneling between the two identical gauche ... |
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| Imaging X-Ray Multilayer Structures with Cross-Sectional HREM, |
05 MAR 1992 |
|
| Authors:
Y. Cheng; M.B. Stearns; D.J. Smith; D.G. Stearns; ARIZONA STATE UNIV TEMPE DEPT OF PHYSICS
|
 | High-resolution electron microscopy (HREM), with a resolution below 2A, is the best tool for observing the actual detailed structure for ML. This gives direct atomic scale information about the film structure, including the bilayer thickness, the crystalline structure and the roughness of the individual layers and the interlayers. In order to maximize the contrast, the HREM images of multilayers are typically recorded with the objective lens close to the Scherzer ... |
|
| Investigation of High Definition Television for Application to Teleconferencing |
FEB 92 |
96 pages |
| Authors:
Gary Rekstad; Dennis Bodson; DELTA INFORMATION SYSTEMS INC HORSHAM PA
|
| In recent years, there has been considerable activity in the development of technology and standards related to High Definition Television (HDTV). According to Advanced Television Systems Committee (ASTC), 'the term HDTV refers to television systems with approximately twice the horizontal and vertical emitted resolution of standard NTSC. HDTV systems are wide aspect ratio systems and may include improvements from IDTV (Improved Definition Television) and EDTV (Extended Definition Television'. The purpose ... |
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| High Resolution Auroral Clutter Mapping Using the Verona Ava Linear Array Radar, |
FEB 1992 |
|
| Authors:
D. S. Choi; B. Weijers; R. J. Norris; N. B. Myers; ROME LAB HANSCOM AFB MA
|
| The Verona Ava Linear Array Radar (VALAR) is a high resolution experimental HF backscatter data acquisition system designed to investigate the characteristics of high latitude auroral clutter. The transmit system located in Ava, New York, is capable of providing RF signals in the 2-30 MHz band with up to 300 kW average power. The receive system at Verona, New York, consists of a 72 element linear antenna array (extending 700 ... |
|
| High Resolution Imaging Using Phase Retrieval. Volume 2 |
OCT 91 |
179 pages |
| Authors:
J. R. Fienup; J. D. Gorman; J. H. Seldin; J. N. Cederquist; ENVIRONMENTAL RESEARCH INST OF MICHIGAN ANN ARBOR ADVANCED CONCEPTS DIV
|
| This report describes a technique for obtaining fine-resolution images, suitable for SDI midcourse discrimination, using an inexpensive, lightweight telescope that would ordinarily yield a poor image. If, instead of collecting a blurred image with the telescope, one sends the light through an amplitude interferometer, then the modulus, but not the phase, of the Fourier transform of the object can be measured, despite the aberrations. We have developed and analyzed phase ... |
|
| Full Field Visualization of Surface and Bulk Acoustic Waves |
SEP 90 |
18 pages |
| Authors:
James W. Wagner; Robert E. Green Jr; JOHNS HOPKINS UNIV BALTIMORE MD DEPT OF MATERIALS SCIENCE AND ENGINEERING
|
| The objective of this research was to apply optical holographic techniques coupled with electronic signal and image processing to provide quantitative, full field measurements of acoustic wave disturbances. High speed pulsed holographic methods were developed to permit visualization of transient acoustic wave fields on the surfaces of solids and plates. In addition, it was possible to produce tomographic displays of acoustic energy flow in optically transparent fluids and solids. Special ... |
|
| Computer Model of a High-Resolution Imaging Sonar |
01 JUL 90 |
59 pages |
| Authors:
Rajendar Bahl; John Powers; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| A computer model of a high-resolution sector-scanning sonar used for imaging objects against the sea bottom is presented. The model accounts for the sonar parameters, bottom backscatter, reflections from the target's visible surface, and the target's acoustic shadow. A variety of imaging scenarios can be simulated including the type of target, the target's orientation relative to the sonar and the bottom, and the backscatter statistics. The acoustic images are presented ... |
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| The Application of HREELS to Model Catalysts: CO and C2H4 Adsorption on Pt/Al2O3 |
20 MAY 90 |
27 pages |
| Authors:
D. A. Hensley; L. L. Kesmodel; INDIANA UNIV AT BLOOMINGTON DEPT OF PHYSICS
|
| A model catalyst made by platinum vapor deposition onto a thin alumina film is investigated with Transmission Electron Microscopy and High Resolution Electron Energy Loss Spectroscopy. The preparation techniques are fully described, then the results of TEM analysis for platinum deposits from 0.3 monolayers to 1.7 monolayers are reported, for which clusters varying from 1.0 to 1.6 nanometers in diameter are observed. High Resolution Electron Energy Loss Spectroscopy spectra are ... |
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| Innovative Techniques for High-Resolution Imaging and Precision Tracking |
20 APR 90 |
102 pages |
| Authors:
J. Nowakowski; D. Gutkowicz-Krusin; G. Lind; RIVERSIDE RESEARCH INST NEW YORK
|
| Collection of quantitative data on signatures of space objects requires knowledge of atmospheric transmission at the geographical site of interest. A method for direct measurement utilizing a unique real-time multipath laser radar is described. Techniques are analytically evaluated for optical autodyne detection which offers the potential of improving the performance of passive and conventional active sensors in detection, recognition and tracking. Optical autodyne detection is a direct detection method for ... |
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| High Resolution Electron Energy Loss Spectroscopy Studies of Chemisorbed Species on Metal Surfaces |
31 MAR 90 |
14 pages |
| Authors:
J. L. Erskine; TEXAS UNIV AT AUSTIN DEPT OF PHYSICS
|
| The objective of this research program is to utilize high resolution electron energy loss spectroscopy and other spectroscopic tools to investigate chemical and physical properties of surfaces and of gas-surface interactions. Our experiments address issues pertaining to bond lengths and site symmetry of chemisorbed atoms and molecules at metal surfaces, binding energies and vibrational frequencies associated with the atomic and molecular bonds, and with the driving mechanisms responsible for structural ... |
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| High Range Resolution Radar Cross-Section Profiles: A Preliminary Analysis |
JAN 90 |
18 pages |
| Authors:
Stephen D. Elton; ELECTRONICS RESEARCH LAB ADELAIDE (AUSTRALIA)
|
| The following provides a brief and informal account of an analysis technique used by the Electronic Warfare Division (EWD) to produce high range resolution radar cross-section (RCS) profiles of maritime targets. We begin by giving a simple theoretical discussion of the basic principle behind the technique employed, and then move on to describe the computer program used to carry out the first stage of the RCS analysis and make comparison ... |
|
| High Resolution Acoustical Imaging |
MAY 89 |
260 pages |
| Authors:
Kent E. Eschenberg; PENNSYLVANIA STATE UNIV UNIVERSITY PARK APPLIED RESEARCH LAB
|
| Pressure waves, detected by an array of receivers, can be analyzed to determine the location of the acoustic source, or the location of objects which the waves encountered along their path. This thesis examines high resolution methods which use a linear array to locate stationary objects which have scattered the pressure waves. Several new methods are explored through simulations in air. A theoretical examination of all of the basic and ... |
|
| Magnetic Mapping of Current Distributions in Two-Dimensional Electronic Devices |
SEP 88 |
4 pages |
| Authors:
John P. Wikswo Jr; VANDERBILT UNIV NASHVILLE TN DEPT OF PHYSICS AND ASTRONOMY
|
| The 4-channel, high-resolution SQUID magnetometer system has been ordered. This system will have a spatial resolution of approximately 1 mm. The motors for the three-axis, non-magnetic positioning system have been obtained after lengthy discussions to eliminate magnetic components from their motors. Assemble of the equipment required for the prototype sub-millimeter SQUID system. The temperature controller for the existing Janis continuous flow cryostat, and a Cooke 3-inch vacuum system was obtained. ... |
|
| High Resolution Radar Imaging |
31 MAY 88 |
37 pages |
| Authors:
Donald L. Snyder; WASHINGTON UNIV ST LOUIS MO ELECTRONIC SYSTEMS AND SIGNALS RESEARCH LAB
|
| The goal of this project is to formulate and investigate new approaches for forming images of radar targets from spotlight-mode, delay- doppler measurements. These measurements could be acquired with a high- resolution radar-imaging system operating with an optical- or radio-frequency carrier. Two approaches are under study. The first is motivated by an image- reconstruction method used in radionuclide imaging called the confidence- weighted algorithm; here, we refer to this approach ... |
|
| Near Real-Time CSG (Constructive Solid Geometry) Rendering Using Tree Normalization and Geometric Pruning |
88 |
24 pages |
| Authors:
Jack Goldfeather; Steven Molnar; Greg Turk; Henry Fuchs; NORTH CAROLINA UNIV AT CHAPEL HILL DEPT OF COMPUTER SCIENCE
|
| Described is a set of algorithms for efficiently rendering a CSG- defined objective directly into a frame buffer without converting first to a boundary representation. The method requires only that the frame buffer contain sufficient memory to hold two color values, two z values, and three one-bit flags. The algorithm first converts the CSG tree to a normalized form that is analogous to the sum-of-products form for boolean switching functions. ... |
|
| High Resolution Process Timing User's Manual |
30 OCT 87 |
|
| Authors:
Allen D. Maloney; ILLINOIS UNIV AT URBANA CENTER FOR SUPERCOMPUTING RESEARCH AND DEVELOPMENT
|
| A high-resolution process timing facility, called HRTIME, has been implemented for the Cedar system. HRTIME is an extension of the Concentrix USER and SYSTEM process states with 10 usec accuracy. In addition, HRTIME provides individual processor timing measurements to give a detailed account of the time spent in various states of sequential and concurrent execution. The main purpose of this manual is to explain how to use the HRTIME facility. ... |
|
| Investigations of High Resolution Imaging through the Earth's Atmosphere Using Speckle Interferometry |
15 MAR 87 |
|
| Authors:
E. K. Hege; STEWARD OBSERVATORY TUCSON ARIZ
|
| Speckle Interferometry can now be used to produce images with spatial resolution of order 100x sharper than that normally permitted by the Earth's atmosphere. During this two year program of technique development we achieved high resolution imaging capability (wavelength dependent; 60 nrad at 410 nm) and approached that resolution in imaging a geosynchronous communications satellite utilizing the Multiple Mirror Telescope (MMT) and the Fienup method. We continued the pattern of ... |
|
| Holographic Optical Elements Formed in Light of Reduced Coherence |
21 FEB 87 |
|
| Authors:
E. Leith; MICHIGAN UNIV ANN ARBOR DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
|
| A new type of interferometer for producing fringes with spatially incoherent light was invented, which can be used for construction of HOEs. A method for forming HOEs of very high diffraction efficiency and low noise was developed. THe new superresolution discovery was explored, and significant experimental verification was carried out. A new method of image formation through inhomogeneities was discovered and experimetally verified. This method is based on the technique ... |
|
| High Resolution Prototype Real-Time Radiography System |
NOV 86 |
|
| Authors:
Raulf M. Polichar; SCIENCE APPLICATIONS INTERNATIONAL CORP SAN DIEGO CA
|
| This report covers the evaluation of a number of advanced X ray converter screens. It concentrates in particular on screen types that are compatible with direct fiber optic readout. The new converters included several types of scintillating fiber optic screens, intagliated phosphor screens and depositions of high efficiency screens directly on fiber optic couplers. The study covered the X ray potentials between 20 KV and 320 KV. The report also ... |
|
| High-Resolution Instrumentation Radar |
30 SEP 86 |
|
| Authors:
Robert B. Dybdal; Keith H. Hurlbut; Tsutomu T. Mori; AEROSPACE CORP EL SEGUNDO CA ELECTRONICS RESEARCH LAB
|
| The development of an instrumentation radar that uses a chirp waveform to achieve high range resolution is described. Such range resolution capability is required for two reasons: (1) to evaluate the response of targets to the operational waveforms used in high-performance radars; and (2) to obtain a means of separating the individual mechanisms that comprise the target scattering response to better understand the scattering process. This particular radar was efficiently ... |
|
| The Design of Radiographic Enhancement Systems |
SEP 86 |
|
| Authors:
Donald T. Hayford; BATTELLE COLUMBUS LABS OH
|
| Preliminary specifications and designs are given for two radiographic enhancement systems. The first system is a portable system designed to be carried with EOD teams to enhance the contrast of low density, low contrast radiographs made with existing EOD radiographic equipment. The second system contains both image enhancement and improved radiographic equipment and is designed to be carried aboard commercial or military aircraft in an airtransportable pod. Expected production costs ... |
|
| An Instrument for Advanced Material Microstructure Analysis |
JUN 1986 |
34 pages |
| Authors:
J. A. Smith; R. A. Hamstra; J. J. LePage; ADVANCED RESEARCH AND APPLICATIONS CORPSUNNYVALE CA
|
| Development and evaluation of a Scintillator Fiber-optic Reticon Detector array (SFRD) for application to a high-resolution computed tomography (CT) instrument, or Tomoscope, has been carried out. The objectives were to develop cryogenic cooling and electronic control and amplification to improve the detector noise performance and to evaluate the thermal, electronic and X-ray performance of the detector package. The thermoelectric cryostat was developed with a temperature floor of -70 C and ... |
|
| Optical Technique for the Measurement of High Temperature Material Erosion |
APR 86 |
|
| Authors:
K. D. Arunkumar; M. Azzazy; J. D. Trolinger; SPECTRON DEVELOPMENT LABS INC COSTA MESA CA
|
| A differential Michelson's interferometer capable of measuring path length variation of the order of 0.002 microns has been developed and tested. It has also been proven that this interferometer can be used to measure surface heights on diffuse objects. This ability of the interferometer will be used in profiling surfaces eroded electrically. To generate electrically eroded surfaces, a discharge chamber has been built and tested. Using copper electrodes, glow discharge ... |
|
| Generation of High Resolution Radar Range Profiles and Range Profile Auto-Correlation Functions Using Stepped-Frequency Pulse Train |
18 OCT 1984 |
|
| Authors:
Thomas H. Einstein; MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB
|
| This report describes some of the issues involved in using stepped- frequency radar pulse trains to obtain high resolution target range profiles. Radar returns from stepped-frequency pulse trains may be processed either coherently or noncoherently. Coherent processing consists of taking the Fourier transform of the N coherently-detected (complex) pulse returns from each range cell, where N is the number of pulses in the train. The output of the transform is ... |
|
| High Resolution Diffraction Grating. |
09 OCT 1984 |
|
| Authors:
L. Sica Jr; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| An optical prism, with an input surface, a reflecting surface and a base, and with a diffraction grating formed on the reflecting surface. The prism is designed so that if an input beam is incident normal to the input surface, then efficiency of the order diffracted in the direction opposite the input beam is greater than a predetermined value. If the prism is fabricated of a material with index of ... |
|
| High-Resolution Spectroscopy and Dynamics of Multiphoton Processes in Atoms and Molecules |
02 JUL 1984 |
|
| Authors:
P. M. Dehmer; J. L. Dehmer; ARGONNE NATIONAL LAB IL
|
| This report summarizes research on resonantly enhanced multiphoton absorption, dissociation, and ionization processes in atoms and molecules. Multiphoton processes are studied using from one to three independently tunable visible and/or UV laser beams in order to establish both the underlying physics and the high degree of selectivity of multiphoton processes. Measurements are made to probe both the formation of excited molecular states and the subsequent behavior of excited states either ... |
|
| High Resolution Acoustic Microstructural Characterization of Titanium with Interstitial Contamination, |
JUL 1984 |
|
| Authors:
A. M. Greenburg; D. E. Yuhas; M. G. Oracvecz; GENERAL DYNAMICS GROTON CT ELECTRIC BOAT DIV
|
| This investigation deals with observations relating to the acoustic characterization of the microstructure of titanium. The main idea is to relate weld integrity, or in this particular case, the level of interstitial gas contamination contained in titanium to variations in acoustic properties. The Scanning Laser Acoustic Microscope was used to obtain both images and quantitative attenuation and velocity data. Acoustic frequencies of 100 MHz and 30 MHz were used. Two ... |
|
| Colloquium on High Resolution Molecular Spectroscopy (8th), 19-23 September 1983 (Colloque sur la Spectroscopie Moleculaire a Haute Resolution (Huitieme), 19-23 Septembre 1983) |
23 SEP 1983 |
|
| Authors:
EUROPEAN OFFICE OF AEROSPACE RESEARCH AND DEVELOPMENT FPO NEW YORK 09510
|
|
| High-Resolution Spectroscopy and Dynamics of Multiphoton Processes in Atoms and Molecules |
15 JUN 1983 |
|
| Authors:
Patricia M. Dehmer; Joseph L. Dehmer; ARGONNE NATIONAL LAB IL
|
| This report summarizes research to establish the high-resolution spectroscopy and detailed mechanisms of sequences of resonant transitions induced in atoms and molecules by multicolor, multiphoton excitation. These processes are studied as a function of the independently tunable frequencies and polarization states of multiple dye laser beams in order to establish both the underlying physics and the high degree of selectivity of this advanced form of laser excitation. Detection methods include ... |
|
| Ground Truth Analysis Supporting the High Resolution Flyover |
MAR 1983 |
|
| Authors:
Daniel F. Lott; NAVAL COASTAL SYSTEMS CENTER PANAMA CITY FL
|
| Ground truth measurements were collected during high resolution flyover tests designed to maximize resolution of a multispectral scanner. Tests were conducted on 27 and 31 August and 1 September 1981 at sites providing different water mass types and bottom reflectances. Measurements of water level, wave heights, surface and water column temperatures, wind speed and direction, solar radiation, diffuse and beam attenuation coefficient, and secchi depth were obtained. The environmental conditions ... |
|
| New Principle of Array Processing in Underwater Passive Listening, |
1983 |
|
| Authors:
G. Bienvenu; THOMSON-CSF PARIS (FRANCE)
|
| One of the main function of an underwater passive listening system is the reckoning of the number of present sources as well as the characteristic parameters of everyone. To do so, the noises transmitted by the sources are used when recorded on the sensors of an array. The basic tool is the spatial processing. The traditional tool is the classical beamforming. Then, in view of improving the performance, one came ... |
|
| High Resolution Spectrum Analysis by Dominant Mode Enhancement, |
1983 |
|
| Authors:
N. L. Owsley; NAVAL UNDERWATER SYSTEMS CENTER NEW LONDON CT NEW LONDON LAB
|
| High-resolution, data adaptive spectrum analysis techniques can exploit prior knowledge of the signal dimensionality and noise coherence to obtain even higher resolution capabilities than previously envisioned. The classical minimum variance (maximum likelihood) and maximum entropy (ME) spectrum estimators form the basis for corresponding enhanced estimators which require only a prior knowledge of signal bandwidth to provide resolution which is limited only by observation time. The basic idea is to identify ... |
|
| Interaction of High Resolution Field Ion Probes with Materials |
12 NOV 1982 |
|
| Authors:
Benjamin M. Siegel; CORNELL UNIV ITHACA NY
|
| Ion beam lithography (IBL) can be expected to have significant advantages over electron beam lithography (EBL). The ions deposit much more energy per charged particle and thus resists are typically 50-100 times more sensitive to ions than to electrons. Also the range of the ions is well defined by their incident energy and there is no backscattering that causes the proximity effects which are a serious limitation in electron beam ... |
|
| A Prototype Tactile Sensor Array |
15 SEP 1982 |
|
| Authors:
James P. Christ; Arthur C. Sanderson; CARNEGIE-MELLON UNIV PITTSBURGH PA ROBOTICS INST
|
| Although there are many potential applications for a tactile sensor array, very few practical implementations of such a sensor have been demonstrated. A practical tactile array sensor needs to be very durable, have a high resolution, have a small physical size, be relatively insensitive to noise, and have a compliant surface. In addition there is both physical and electrical coupling between elements of the array which should be eliminated or ... |
|
| Saturation Splitting in the Spectrum of Resonant Degenerate Four-Wave Mixing |
12 JUL 1982 |
|
| Authors:
Govind P. Agrawal; A. Van Lergerghe; P. Aubourg; J. L. Boulnois; CITY COLL NEW YORK DEPT OF PHYSICS
|
|
| High Resolution Spectral Absorption in the Short Wavelength Wing of the 2.7-micrometer Water Band at 1,000K |
APR 1982 |
|
| Authors:
Lauren M. Peterson; SVERDRUP TECHNOLOGY INC ARNOLD AFS TN
|
| High-temperature water vapor absorption measurements taken by Environmental Research Institute of Michigan in 1978 have been reduced and compared with computer-generated spectra based upon the Air Force Geophysics Laboratory line tabulation. The latter tabulation failed to predict numerous spectral lines, or, in many cases, did not predict them accurately. Although the scope of this particular effort allowed only a brief analysis of a few lines in a selected spectral interval, ... |
|
| High-Resolution Spectroscopy and Dynamics of Multiphoton Processes in Atoms and Molecules |
17 FEB 1982 |
|
| Authors:
Patricia M. Dehmer; Joseph L. Dehmer; ARGONNE NATIONAL LAB IL
|
| This report summarizes research to establish the high-resolution spectroscopy and detailed mechanisms of sequences of resonant transitions induced in atoms and molecules by multicolor, multiphoton excitation. These processes are studied as a function of the independently tunable frequencies and polarization states of multiple dye laser beams in order to establish both the underlying physics and the high degree of selectivity of this advanced form of laser excitation. Detection methods include ... |
|
| High-Resolution Spectroscopy and Collision Studies of High-Lying Atomic States Using Four-Wave Mixing |
09 FEB 1982 |
|
| Authors:
D. G. Steel; J. F. Lam; R. A. McFarlane; HUGHES RESEARCH LABS MALIBU CA
|
|
| High-Resolution Extreme-Ultraviolet Spectroscopy of Potassium Using Anti-Stokes Radiation |
04 MAY 1981 |
|
| Authors:
Joshua E. Rothenberg; J. F. Young; S. E. Harris; STANFORD UNIV CA EDWARD L GINZTON LAB OF PHYSICS
|
|
| Angular Interferometry-Resolution Enhancement Using Half-Wave Plates |
FEB 1981 |
|
| Authors:
George B. Hept; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH
|
| Draper Laboratory is using an interferometer to monitor the rotation of an actively-controlled test platform to .01 arcsec. The resolution of the interferometer needed to be doubled in order to achieve this accuracy goal. The resolution of an interferometer can be doubled by sending the beam back to its target a second time. A method for doing this, analogous to the quarter-wave plate/plane-mirror doubling scheme commonly used in linear interferometry, ... |
|
| Seventh Colloquium on High Resolution Molecular Spectroscopy 14 to 18 September 1981 (Septieme Colloque sur la Spectroscopie Moleculaire a Haute Resolution 14 a 18 Septembre 1981) |
1981 |
|
| Authors:
Ian M. Mills; Gilbert Amat; READING UNIV (ENGLAND) DEPT OF CHEMISTRY
|
| This conference addressed many aspects of high resolution molecular spectroscopy. Measurement techniques for remotely identifying trace gases in the atmosphere were discussed. Instrumentation for highly accurate and precise measurement of molecular emissions were described. The objective of the colloquium was to bring together molecular spectroscopists working in different regions of the electromagnetic spectrum from the ultraviolet to radio frequencies. These scientists shared a common interest in high resolution gas phase ... |
|
| The High Resolution Imaging Atom-Probe with Application to Nickel Platings. |
17 DEC 1980 |
|
| Authors:
Michael Martinka; PENNSYLVANIA STATE UNIV UNIVERSITY PARK APPLIED RESEARCH LAB
|
| This work concerns the development of a high resolution imaging atom-probe time-of-flight mass spectrometer, its performance, and its application to electro- and electroless nickel, nickel-phosphorus platings, and to hydrogen adsorbed on rhodium. An imaging atom-probe displays the distribution over a sample's surface of a constituent mass species selected from the sample's time-of-flight spectra. Imaging of the sample surface is at atomic resolution by field-ion, desorption, and gated desorption microscopy. The ... |
|
| High Resolution Vacuum Ultraviolet Spectroscopy of Small Molecules. |
30 SEP 1980 |
|
| Authors:
W. H. Parkinson; D. E. Freeman; K. Yoshino; HARVARD COLL OBSERVATORY CAMBRIDGE MASS
|
| A 6.65 metre vacuum spectrograph operated at a wavelength resolution of 0.0006 nm has been used to study the spectroscopy of rare gas molecules relevant to the development of intense vacuum ultraviolet radiation sources and lasers, and photoabsorption and predissociation processes in molecular nitrogen, which in the 80-100 nm region are important sources of upper atmospheric atomic nitrogen. Absorption spectra of XeHe, XeNe, XeAr, XeKr, KrHe, KrNe, and KrAr have ... |
|
| Hydration of Tricalcium Silicate - A Study by High Resolution Scanning Electron Microscopy, |
1980 |
|
| Authors:
D. Menetrier; I. Jawed; J. Skalny; MARTIN MARIETTA LABS BALTIMORE MD
|
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Reports by Keyword(s)
*HIGH RESOLUTION
