Biodiversity Heritage Library

481
481

Aug 17, 2010
08/10

by
Long, Charles E; Coastal Engineering Research Center (U.S.); United States. Army. Corps of Engineers; U.S. Army Engineer Waterways Experiment Station

texts

######
eye 481

######
favorite 0

######
comment 0

"July 1991."

Topics: Ocean waves, Rayleigh waves

16 pages : 28 cm

Topics: Rayleigh waves, Atmospheric waves

19 pages : 28 cm

Topics: Seismometry, Seismometry, Rayleigh waves

14 pages : 28 cm

Topics: Rayleigh waves, Earthquakes, Russia (Federation) -- Kamchatka Peninsula

10 pages : 28 cm

Topics: Surface waves (Oceanography) -- Measurement, Rayleigh waves

This thesis describes the beach field-testing of a 2-degree-of-freedom (2-DOF) transverse line Rayleigh wave source for use in a seismo-acoustic SONAR for buried mine detection. The source is composed of six identical modules, each composed of two radial and two vertical inertial mass shakers, all mounted to a common base plate. The vertical and horizontal excitation of each module is independent. Electrically, the six modules are organized into three independent sets of two. The length of the...

Topics: Rayleigh waves, Sonar, Land mines, Seismic waves, Physics

This paper deals with the propagation of Rayleigh waves in a homogeneous, prestressed elastic layer of finite thickness over a homogeneous, prestressed elastic half‐space. The dispersion equation has been derived for a layer over a half‐ space, when both media are considered as prestressed and the effect of initial stress shown in earlier investigators, is in general not applicable to the case of prestressed media, as well as the problem of Rayleigh waves has been...

Topics: Rayleigh Waves, Prestressed Media, Orthotropic Media, Anisotropic Media

Free Electron Lasers are the focus of a recently announce Innovative Navy Prototype to develop a directed energy weapon system for the self-defense of ships. Operating in a shipboard environment poses several challenges that must be overcome. Short Rayleigh length systems offer solutions to some of these problems. Simulations were performed to examine the benefit of short Rayleigh length designs in the face of electron beam misalignment. Additionally, simulations were performed to explore the...

Topics: Free electron lasers, Directed-energy weapons, Military art and science, Technological innovations,...

We have examined the feasibility of using short-period, fundamental-mode surface waves (Rg) to estimate the yields and depths of burial (DOB) of small chemical explosions recorded at local distances. Rg and other surface wave arrivals were recorded from the HUMBLE REDWOOD I and II (HR I and II) experiments. The experiments were conducted in and above the dry alluvium of Kirtland AFB, NM near the eastern margin of the Albuquerque Basin, and were recorded by extensive local seismic and acoustic...

Topics: DTIC Archive, WESTON GEOPHYSICAL CORP LEXINGTON MA, *RAYLEIGH WAVES, *SEISMIC VELOCITY, AMPLITUDE,...

256
256

Jun 9, 2011
06/11

by
Nguyen, Truong X.; Dudley, Kenneth L.; Scearce, Stephen A.; Ely, Jay J.; Richardson, Robert E.; Hatfield, Michael O

texts

######
eye 256

######
favorite 0

######
comment 0

An investigation was performed to study the potential for radio frequency (RF) power radiated from Portable Electronic Devices (PEDs) to create an arcing/sparking event within the fuel tank of a large transport aircraft. This paper describes the experimental methods used for measuring RF coupling to the fuel tank and Fuel Quantity Indication System (FQIS) wiring from PED sources located in the passenger cabin. To allow comparison of voltage/current data obtained in a laboratory chamber FQIS...

Topics: MATHEMATICAL MODELS, THREE DIMENSIONAL MODELS, ACOUSTIC EMISSION, WAVE PROPAGATION, FRACTURES...

The final report describes the development, construction, operation, data collection and data processing associated with the strain/inertial seismograph at Queen Creek, Arizona (QC-AZ), from 1 July 1968 to 1 June 1972. Strain seismographs were matched in sensitivity, amplitude, and phase to long- period (LP) inertial seismographs at 100K magnifications. Strain sensitivities of 2.5 x 10 to the minus 13th power at 30 sec were achieved. Operating magnifications were limited by ambient unrest of...

Topics: DTIC Archive, Fix, James E, TELEDYNE GEOTECH GARLAND TX, *DATA PROCESSING, *SEISMOLOGICAL STATIONS,...

A generalized Reciprocity Principle for Acoustics is obtained. By specialization, various principles which appear in the literature are obtained...Rayleigh, Mass conservation equation, Green's theorem

Topics: DTIC Archive, Case, K, MITRE CORP MCLEAN VA JASON PROGRAM OFFICE, *ACOUSTICS, MASS, CONSERVATION,...

The correct identification and association of Rayleigh waves is vital within the context of the CTBT because of the use of the body-wave to surface wave magnitude ratio m(b):M(s) as a discrimination method. Rayleigh waves can be identified by their dispersion characteristics (the variation in group speed with frequency) and their elliptical polarization in the plane of propagation. Classically, Rayleigh waves are associated with a seismic disturbance by calculating the angle from which the wave...

Topics: DTIC Archive, MINISTRY OF DEFENCE READING (UNITED KINGDOM), *IDENTIFICATION, *RAYLEIGH WAVES,...

We perform ambient noise tomography of China using the data from the China National Seismic Network and surrounding global and PASSCAL stations. The results so far are summarized below. (1) Dispersion measurements and tomography. For most of the station pairs, we retrieve good Rayleigh waveforms from ambient noise correlations using 18-months of continuous data at all distance ranges across the entire region (over 5000 km) and for periods from 70 s down to about 8 s. We obtain Rayleigh wave...

Topics: DTIC Archive, ILLINOIS UNIV AT URBANA-CHAMAPAIGN, *DISPERSING, *AMBIENT NOISE, *TOMOGRAPHY,...

Using spatial coherency estimates of Rayleigh and Love waves recorded at ALPA, LASA and NORSAR, it is demonstrated that for a particular frequency the wave propagation cannot be described by a unique wavevector. Instead, the propagation is better described by a distribution in the wavenumber domain or, in physical terms, a distribution in azimuth and phase velocity. In general the coherency in the mean direction of propagation, which is a function of the velocity distribution, stays high...

Topics: DTIC Archive, Mack, H, TELEDYNE GEOTECH ALEXANDRIA VA, *UNDERGROUND EXPLOSIONS, DETECTION, NUCLEAR...

An analysis of microseism ground motion at Palisades and Weston is made on the basis of both statistical and individual wave studies. Data from three-component seismographs are utilized for the study of six mioroseism storms. The results of both methods of ground motion analysis show that the microseisms studied for Palisades and Weston are either pure Rayleigh waves or combinations of Rayleigh waves approaching from different directions. The study also tends to support earlier findings that a...

Topics: DTIC Archive, Blaik, Maurice, Donn, William L., LAMONT GEOLOGICAL OBSERVATORY PALISADESNY,...

Vertically polarized shear wave velocity (VSV), determined primarily from fundamental mode Rayleigh waves, and the difference between the velocity of horizontally polarized shear waves (VSH) and VSV, therefore a measure of anisotropy, are shown.

Topics: NASA Technical Reports Server (NTRS), SURFACE WAVES, TOMOGRAPHY, ANISOTROPY, RAYLEIGH WAVES, SH...

Surface wave magnitude [M(sub s)] estimation for small events recorded at near-regional distances will often require a magnitude scale designed for Rayleigh waves with periods between 5 and 25 seconds. We have completed several studies aimed at examining the usefulness of existing and new formulas at estimating surface wave magnitudes at periods not restricted to approximately 20 seconds. In Chapter 1, we show that 7-second surface waves can be used to estimate magnitudes for Nevada Test Site...

Topics: DTIC Archive, Bonner, Jessie L, WESTON GEOPHYSICAL LEXINGTON MA, *SEISMIC DISCRIMINATION,...

A summary report listing tasks performed and complete reference listing of all publications originating from Contract during reporting period. The main emphasis was placed on reflection and transmission of a bounded ultrasonic beam since it had been found that plane wave theory (as almost always used in the past) does not explain the existence of nonspecular ultrasonic reflection from interfaces, where 'nonspecular reflection' refers to beam displacements, beam split-up, intensity distribution...

Topics: DTIC Archive, Mayer,Walter G, GEORGETOWN UNIV WASHINGTON DC DEPT OF PHYSICS, *Ultrasonics,...

We will describe the major accomplishments in each of the following research efforts: (A) 3D magnetospheric modeling, (B) Tearing instability in an anisotropic neutral sheet, (C) Auroral plasma transport, (D) Magnetic shear effects on the current driven ion cyclotron instability, (E) Instability mechanisms causing high latitude ionospheric irregularities, (F) Auroral instability studies, (G) Nonlinear saturation of low hybrid drift instability and anomalous plasma transport, (H) Laser/HANE...

Topics: DTIC Archive, Hyman,E, SCIENCE APPLICATIONS INC MCLEAN VA, *ATMOSPHERIC DISTURBANCES, *ATMOSPHERIC...

Normal mode theory, extended to the slightly laterally heterogeneous Earth by the first-order Born approximation, is applied to the waveform inversion of mantle Love waves (200-500 sec) for the Earth's lateral heterogeneity at l=2 and a spherically symmetric anelasticity (Q sub mu) structure. The data are from the Global Digital Seismograph Network (GDSN). The l=2 pattern is very similar to the results of other studies that used either different methods, such as phase velocity measurements and...

Topics: NASA Technical Reports Server (NTRS), BORN APPROXIMATION, EARTH MANTLE, LOVE WAVES, WAVEFORMS,...

Analytic and simulation results are presented which describe the statistics of the duration and separation of scintillation which results when radio frequency signals propagate through randomly ionized media. This work is applicable to the problems of satellite communication and space based radar observation through disturbed ionospheric channels that result from high altitude chemical release or nuclear detonation. In these environments, a radio frequency signal that traverses the disturbed...

Topics: DTIC Archive, Dana, Roger A., MISSION RESEARCH CORP SANTA BARBARA CA, *SATELLITE COMMUNICATIONS,...

A radar architecture that requires a single analog-to-digital converter and no active phase shifters was developed that can electronically search a three-dimensional (3-D) volume and provide range resolution and angular resolution proportional to the Rayleigh criterion for a given bandwidth and aperture size. The architecture is based on a frequency scanning antenna feed with delay lines whose lengths are randomly selected in combination with digital signal processing algorithms. I investigated...

Topics: DTIC Archive, ARMY RESEARCH LAB ADELPHI MD SENSORS AND ELECTRON DEVICES DIRECTORATE, *RADAR...

An analysis was made of seismological data from an underground nuclear explosion as a continuing study to provide information to aid in distinguishing between earthquakes and explosions. A table of travel-times and amplitudes of P, Pg, Lg, and surface waves is included along with other unidentified phases.

Topics: DTIC Archive, Moore, E W, TELEDYNE INDUSTRIES INC ALEXANDRIA VA EARTH SCIENCES DIV, *UNDERGROUND...

This thesis presents an OPNET model and simulation of a single cell wireless communications system within a proposed expeditionary warfare communications network. The focus of this thesis is to model and implement data and voice traffic generation, slofted ALOHA medium access control protocol, and direct sequence spread spectrum code division multiple access (CDMA) mechanisms in OPNET. The RF channel is modeled as both a Rayleigh fading channel and a non-fading noise limited channel. Simulation...

Topics: DTIC Archive, Standfield, Roger D., NAVAL POSTGRADUATE SCHOOL MONTEREY CA, *COMMUNICATIONS...

Comparison of the characteristic dispersion curves of Rayleigh waves from earthquakes occurring in five sections of the Mid-Atlantic Ridge, whose travel paths to Weston include basin and basin plus ridge paths, is made with a theoretical curve taken from Dorman's Cue 8099 and Dorman and Oliver's Case 8341 to determine the effect of the Ridge on the dispersion of Rayleigh waves. Small increments of variations between the averaged dispersion curves traversing only basin paths and those traversing...

Topics: DTIC Archive, Ossing, Henry A, AIR FORCE CAMBRIDGE RESEARCH LABS HANSCOM AFB MA, *SEISMIC WAVES,...

The report presents results from an evaluation of the discrimination capability of the Norwegian Short and Long Period Array (NORSAR) for Eurasian events. The following types of discriminants have been analyzed and their performance has been compared: Rayleigh wave energy versus (m sub b)((M sub s)- (m sub b), AR/(m sub b)); Love wave energy versus (m sub b)((M sub s)-(m sub b), AL/(m sub b)); short period P-wave complexity versus (m sub b) (three discriminants); and short period P-wave...

Topics: DTIC Archive, Ringdal, Frode, TEXAS INSTRUMENTS INC DALLAS EQUIPMENT GROUP, *SEISMIC ARRAYS,...

Published results of work that dealt with various effects of surface roughness on the physical properties of solids are discussed. (Author)

Topics: DTIC Archive, Maradudin,A A, CALIFORNIA UNIV IRVINE, *Surface roughness, *Surface properties,...

Research was conducted in the following areas of interest: (1) A paper entitled 'Intra-Plate Seismicity, Reactivation of Pre-Existing Zones of Weakness, Alkaline Magnetism, and Other Tectonism Post-Dating Continental Fragmentation'; In one portion of the paper the tectonics of the French test site in Algeria are investigated. The study shows that the test site is not in the middle of a shield area. Other authors have shown that tectonic setting is significant in estimating yield from seismic...

Topics: DTIC Archive, Murphy,A J, LAMONT-DOHERTY GEOLOGICAL OBSERVATORY PALISADES NY, *Tectonics, *Seismic...

Amplitudes of Rayleigh waves generated by some southern Nevada nuclear explosions and cavity collapses were analyzed. The Rayleigh amplitude radiation patterns for all the explosions and collapses investigated were found to be similar within the expected variation of 30% due to calibration and measurement errors. The primary factor affecting the Rayleigh amplitude radiation patterns of the explosions was found to be the effect of the earth structure along the travel paths from source to...

Topics: DTIC Archive, Masse, Robert P, TELEDYNE GEOTECH ALEXANDRIA VA SEISMIC DATA LAB, *NUCLEAR...

Tilt steps similar to strain steps have been observed for earthquakes with magnitudes ranging from 2 to 8 and distances ranging anywhere from 10 km to 12,600 kilometers. Tilt-step propagation velocities from the hypocenter to the station have been observed from 1.2 to 3.8 km/sec, and those corresponding to the arrival time of teleseismic S waves. Tilt directions, amplitudes and velocities observed at several stations simultaneously for the same earthquake are internally consistent and are...

Topics: DTIC Archive, Berg, Eduard, ALASKA UNIV FAIRBANKS GEOPHYSICAL INST, *ALASKA, *EARTHQUAKES,...

The authors investigate the application of two numerical methods (finite element and finite difference approximations) toward the ultimate solution of problems involving the propagation of Rayleigh waves generated by an explosion in the atmosphere over an island atoll. Because of mathematical difficulties in these methods, useful calculations of Rayleigh wave spectra at teleseismic distances were not obtained. It appears that the physical constraints of the atoll structure, e.g., abrupt changes...

Topics: DTIC Archive, McCowan, D W, TELEDYNE GEOTECH ALEXANDRIA VA ALEXANDRIA LABS, *NUCLEAR EXPLOSIONS,...

Long period Rayleigh wave and Love wave dispersion data, particularly for oceanic areas, were not simultaneously satisfied by an isotropic structure. Available phase and group velocity data are inverted by a procedure which includes the effects of transverse anisotropy, an elastic dispersion, sphericity, and gravity. The resulting models, for the average Earth, average ocean and oceanic regions divided according to the age of the ocean floor, are quite different from previous results which...

Topics: NASA Technical Reports Server (NTRS), GROUP VELOCITY, LITHOSPHERE, LOVE WAVES, OCEANS, RAYLEIGH...

The goal of this project is to reduce the magnitude threshold for which surface waves can be identified and measured reliably, and to improve the accuracy of surface wave measurement, using phase-matched filtering and global regionalized earth and dispersion models. Significant products and results of this work include: 1) assembly of a data set of dispersion measurements of over one million data points; 2) tomographic inversion of this data set for global earth and dispersion models; 3)...

Topics: DTIC Archive, Stevens, Jeffry L, SCIENCE APPLICATIONS INTERNATIONAL CORPSAN DIEGO CA, *SURFACE...

;Contents: Opeing presentation ARPA symposium on seismic discrimination; Theoretical M(s)-m(b) relation for small magnitudes; Earthquakes and explosion magnitudes: the effect of lateral variation of seismic attenuation; Analysis of long period noise at LASA; Long-period earth noise and the detection of and discrimination between earthquakes and underground explosions, etc.

Topics: DTIC Archive, ADVANCED RESEARCH PROJECTS AGENCY ARLINGTON VA, *SEISMOLOGY, *UNDERGROUND EXPLOSIONS,...

We report on progress toward an attenuation model for short-period (10-20 s) Rayleigh waves in Central Asia and surrounding regions. This model will be defined by maps of attenuation across the region of study in the specified period band. The model is designed to calibrate the regional surface-wave magnitude scale and to extend the teleseismic 'surface-wave magnitude-body-wave magnitude' (Ms-mb) discriminant to regional distances (Marshall and Basham, 1971; Bonner et al., 2006; Russell, 2006)....

Topics: DTIC Archive, COLORADO UNIV AT BOULDER, *RAYLEIGH WAVES, SYMPOSIA, SURFACE WAVES, REGIONS,...

Previous semi-annual technical reports under this contract have dealt with the generation of acoustic-gravity waves and Rayleigh waves by explosive sources. Section II of this final report is a review and evaluation of source and linear propagation theory of acoustic-gravity waves. The discussion is limited to the literature involving acoustic-gravity waves which travel in the lower atmosphere and to solutions not involving finite difference and finite element techniques. In Section III, the...

Topics: DTIC Archive, Harkrider, David G, CALIFORNIA INST OF TECH PASADENA SEISMOLOGICAL LAB, *AIRBURST,...

Broadband data (.02 to 20 Hz) from the University of California Lawrence Livermore Laboratory four-station seismic array, deployed at close range (less than 500 km) azimuthally about Nevada Test Site (NTS), allow investigation of the body wave-surface wave discriminant between explosion and earthquakes for small events confined to NTS, extending previous results to magnitudes around 3.5. It is found that natural earthquakes, explosion collapses, and explosion aftershocks all are distinct from...

Topics: DTIC Archive, Peppin, William A, CALIFORNIA UNIV BERKELEY DEPT OF GEOLOGY AND GEOPHYSICS,...

Seismological research at the Lamont-Doherty Geological Observatory is summarized for the period 1 August 1969 to 1 July 1970. During this period extensive analysis was done on the excitation of long-period (15-70 second) Rayleigh and Love waves by earthquakes, underground explosions and presumed explosions.

Topics: DTIC Archive, Kelleher, John A, LAMONT-DOHERTY GEOLOGICAL OBSERVATORY PALISADES NY, *SEISMOLOGICAL...

In order to exploit the information on surface wave propagation that is stored in large seismic event datasets, Sandia and Lawrence Livermore National Laboratories have developed a MatSeis interface for performing phase-matched filtering of Rayleigh wave arrivals. MatSeis is a MATLAB-based seismic processing toolkit which provides graphical tools for analyzing seismic data from a network of stations. Tools are available for spectral and polarization measurements, as well as beam forming and f-k...

Topics: DTIC Archive, LAWRENCE LIVERMORE NATIONAL LAB CA, *SURFACE WAVES, COMPUTERIZED SIMULATION,...

A surface vibratory investigation was conducted at two proposed damsites (Dutch Gulch and Tehama) in connection with the Cottonwood Creek Project near Redding, California. From this investigation, Rayleigh-wave (R-wave) velocities (analogous to shear-wave velocities) were determined for the materials at the sites to a depth of approximately 50 ft. Results of the investigation conducted at the Dutch Gulch site indicated that R-wave velocities generally fell within an 850- to 1000-fps range and...

Topics: DTIC Archive, Curro,Joseph R , Jr, ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS...

Examples of both narrow and broad region dispersion analysis for long-period surface waves are presented. Narrow region dispersion analysis of Kuriles/Kamchatka earthquake signals recorded at Guam, by means of moving-window maximum entropy spectral analysis, indicates strong multipathing in the 3.0 to 4.5 km/sec group velocity range, causing poor polarization filter performance. In contrast, between 2.0 and 3.0 km/sec the signals are well defined, resulting in a good polarization filter...

Topics: DTIC Archive, Unger, Rudolf, TEXAS INSTRUMENTS INC DALLAS EQUIPMENT GROUP, *SEISMIC WAVES,...

A mathematical description of coupled. surface-wave propagation in elastic waveguides whose properties change slowly in the lateral or transverse directions has been constructed. This construction includes curved waveguides (shells) whose radius of curvature is large with respect to thickness. The work was undertaken to explore a nondestructive way to interrogate an inaccessible side of a structure by launching a surface wave on the other accessible side. For flat waveguides (plates) whose...

Topics: DTIC Archive, Harris, John G, ILLINOIS UNIV AT URBANA DEPT OF THEORETICAL AND APPLIED MECHANICS,...

Three-dimensional wave propagation in an elastic half-space is considered. The half-space is traction free on half its boundary, while the remaining part of the boundary is free of shear traction and is constrained against normal displacement by a smooth, rigid barrier. A time-harmonic surface wave, traveling on the traction free part of the surface, is obliquely incident on the edge of the barrier. The amplitude and the phase of the resulting reflected surface wave are determined by means of...

Topics: DTIC Archive, Freund, L B, BROWN UNIV PROVIDENCE RI DIV OF ENGINEERING, *MECHANICAL WAVES,...

A Green's function method is used to find the low temperature change in the specific heat due to a (110) surface on a simple cubic monatomic lattice. Two separate first neighbor force constant models are used for the CALCULATION: the first assumes that the atomic motion normal to the surface is uncoupled from motion parallel to the surface; the second is the familiar two force constant model popularized by Montroll and Potts. Both models are anisotropic in the surface and neither satisfies the...

Topics: DTIC Archive, Cunningham, Stephen L, CALIFORNIA UNIV IRVINE DEPT OF PHYSICS, *CRYSTAL LATTICES,...

This paper describes an experiment to demonstrate for the first time, laser wakefield acceleration (LWFA), driven by 1O.6-micrometer light from a CO2 laser. This experiment is also noteworthy because it will operate in a pseudoresonant LWFA regime in which the laser-pulse-length is too long for resonant LWFA, but too short for self-modulated LWFA. Nonetheless, high acceleration gradients are still possible. This experiment builds upon an earlier experiment called staged electron laser...

Topics: DTIC Archive, NAVAL RESEARCH LAB WASHINGTON DC, *CARBON DIOXIDE LASERS, LASER APPLICATIONS, RAMAN...

The report calls for detailed analyses of the correlation between infrasonic microbarometric phenomena and signals observed on long period seismographs. Specifically, these studies include acoustic wave generation (a) in the vicinity of the earthquake epicenter (b) in the vicinity of the seismic and acoustic receivers and (c) due to coupling between Rayleigh waves and acoustic waves. The contract also provides for the study of the source and propagation characteristics of infrasonic phenomena...

Topics: DTIC Archive, Pomeroy, Paul W, MICHIGAN UNIV ANN ARBOR, *MICROBAROMETRIC WAVES, *SEISMIC WAVES,...

The research accomplishments during the past reporting period are given in a series of abstracts included in the report Particular emphasis has been placed on the development of source theory and its incorporation into the calculation of synthetic seismograms in the frequency domain. These techniques were used in the first half of the reporting period to determine theoretical M(S) distance corrections; the effect of tectonic regions on the body wave spectra of explosions, and in the evaluation...

Topics: DTIC Archive, Anderson, Don L, CALIFORNIA INST OF TECH PASADENA SEISMOLOGICAL LAB, *SEISMOLOGY,...

Spectral analyses of P and P coda on teleseismic recordings of nuclear explosions at Yucca Flats and Pahute Mesa regions of the Nevada Test Site (NTS) seem to provide explosion source medium information. The spectral ratio P/P-coda on short-period vertical component records at NORSAR shows positive correlation with explosion medium velocity. It seems that the initial P from generally shallower explosions within a low velocity medium experiences significantly lower scattering Q (and perhaps also...

Topics: DTIC Archive, Gupta,I N, TELEDYNE GEOTECH ALEXANDRIA VA ALEXANDRIA LABS, *NUCLEAR EXPLOSIONS,...

The accurate estimation of yields from small chemical and nuclear explosions represents a difficult and continuing problem for the Nuclear Explosion Monitoring (NEM) community. P-wave spectra, Pn amplitudes, Lg amplitudes, intermediate-period surface wave amplitudes, or coda techniques are some of the methods that have been proposed for estimating the yields of small explosions recorded at regional distances. However, the uncertainty on seismic yield estimates can be large, and reducing the...

Topics: DTIC Archive, Bonner,Jessie L, WESTON GEOPHYSICAL CORP LEXINGTON MA LEXINGTON United States,...