| GigE Advanced Imaging Sensor |
23-Nov-2009 |
9 pages |
| Authors:
Lon van Sunshine; Peter Ham; BAE SYSTEMS NASHUA NH
|
 | An advanced sensor was developed and tested under this effort. This sensor uses an EMCCD with an active focal plane of 658 by 496 pixels, in conjunction with a controllable iris and wide field of view lens to provide situation awareness over full daylight to extreme dark conditions. The interface to the sensor is over GigE, allowing high data rate signal transmission. Intensive mechanical design was applied to advance the ... |
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| A New Spectro-Polarimeter for Solar Prominence and Filament Magnetic Field Measurements |
Nov-2009 |
11 pages |
| Authors:
David F Elmore; Roberto Casini; Greg L Card; Marc Davis; Alice Lecinski; Ron Lull; Peter G Nelson; Steven Tomczyk; NATIONAL CENTER FOR ATMOSPHERIC RESEARCH BOULDER CO
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| We are constructing a spectro-polarimeter using the 4 0-cm coronagraph at the Evans Solar Facility of the National Solar Observatory in Sunspot, NM for the purpose of measuring the vector magnetic filed in prominences and filaments. The Prominence Magnetometer (ProMag) is comprised of a polarization modulation package and a spectrograph. The modulation optics are located at the prime focus of the coronagraph along with calibration optics and a beamsplitter that ... |
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| 3D Modeling of Iran and Surrounding Areas from Simultaneous Inversion of Multiple Geophysical Datasets |
30-Sep-2009 |
10 pages |
| Authors:
Charles J Ammon; Monica Maceira; PENNSYLVANIA STATE UNIV UNIVERSITY PARK
|
| The objective of this work is to help improve seismic monitoring technology through the development and application of advanced multivariate inversion techniques to generate realistic, comprehensive, and high-resolution 3D models of the seismic structure of the crust and upper mantle that satisfy independent geophysical datasets. Our focus is on the region surrounding Iran from the east coast of the Mediterranean in the west, to Pakistan in the east, an area ... |
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| Electromagnetic Environmental Effects System Testing |
02-Sep-2009 |
179 pages |
| Authors:
ARMY WHITE SANDS TEST CENTER WHITE SANDS MISSILE RANGE NEW MEXICO SURVIVABILITY VULNERABILITY AND ASSESSMENT DIRECTORATE (SVAD)
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| This Test Operational Procedure (TOP) provides the Electromagnetic Environmental Effects (E3) interface requirements and verification criteria for airborne, sea, space, and ground systems, including associated ordnance, as stated in military standard (MIL-STD)-464A Electromagnetic Environmental Effects Requirement for Systems, as well as ADS-37A-PRF Aeronautical Design Standard for the Electromagnetic Environmental Effects (E3) Performance and Verification Requirements. |
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| Low-Latitude Western North Atlantic Climate Variability During the Past Millennium: Insights from Proxies and Models |
Sep-2009 |
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| Authors:
Casey P Saenger; WOODS HOLE OCEANOGRAPHIC INSTITUTION MA
|
 | Estimates of natural climate variability during the past millennium provide a frame of reference in which to assess the significance of recent changes. This thesis investigates new methods of reconstructing low-latitude sea surface temperature (SST) and hydrography, and combines these methods with traditional techniques to improve the present understanding of western North Atlantic climate variability. A new strontium/calcium (Sr/Ca) - SST calibration is derived for Atlantic Montastrea corals. This calibration ... |
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| Assessment of a Bayesian Model and Test Validation Method |
11-Aug-2009 |
17 pages |
| Authors:
Greg Hulbert; Panos Papalambros; Yogita Pai; Michael Kokkolaras; Michael K Pozolo; Yan Fu; Ren-Jye Yang; Saeed Barbat; ARMY RESEARCH DEVELOPMENT AND ENGINEERING COMMAND WARREN MI
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| Bayesian framework promising for validation: incorporates statistics of field data, incorporates statistics of M&S, and enables systematic evaluation of data variability. Systematic method for accepting and comparing M&S. Further refinement needed for calibration and sensitivity. Further research required for accreditations use. |
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| Aluminum Alloy 7068 Mechanical Characterization |
Aug-2009 |
18 pages |
| Authors:
Michael Minnicino; David Gray; Paul Moy; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE
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| A relatively new alloy of aluminum is being marketed as ordnance aluminum by its developer, Kasier Aluminum (Foothill Ranch, CA), owing its history to the development of ordnance applications. The aluminum alloy designation, 7068, is the strongest aluminum commercially produced. This alloy is aluminum zinc, with an advertised minimum yield strength of 99 ksi. This report characterizes extruded 7068 aluminum in terms of its elastic properties and mechanical strength, in ... |
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| Data Assembly and Processing for Operational Oceanography: 10 Years of Achievements |
20-Jul-2009 |
27 pages |
| Authors:
Le; N Hoepffner; F Bonjean; D Griffin; G Jacobs; H Roquet; C Donlon; D Roemmich; A Bentamy; S Pouliquen; S Guinehut; G Larnicol; P Y Traon; L A Breivick; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
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| Data assembly and processing centers are essential elements of the operational oceanography infrastructure. They provide data and products needed by modeling and data assimilation systems; they also provide products directly useable for applications. The paper will discuss the role and functions of the data centers for operational oceanography and describe some of the main data assembly centers developed during GODAE: Argo and Coriolis data centers for in-situ data, SSALTO/DUACS and ... |
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| Calibration of an Orthogonal Cluster of Magnetic Sensors |
Jul-2009 |
34 pages |
| Authors:
Andrew A Thompson; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE
|
| This report interprets least-squares estimation as a magnetic sensor calibration procedure. The procedure demonstrated can be applied to any inner product type of sensor element to calibrate a single sensor or multisensor unit. The accuracy of the estimates can be quantified. In addition to scale factor and bias, the within-unit alignment and the alignment to a given coordinate system can be estimated. |
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| Simulation of Ballistic Impact of a Tungsten Carbide Sphere on a Confined Silicon Carbide Target |
Jun-2009 |
16 pages |
| Authors:
C G Fountzoulas; B A Cheeseman; J C LaSalvia; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE
|
| The present investigation is a continuation of our previous study on the ability of the phenomenological Johnson-Holmquist model to predict the observed damage induced by spheres of tungsten carbide (WC) striking confined cylinders of silicon carbide (SiC) at velocities between 63 m/s to 500 m/s. In this study, the WC was modeled using the Johnson-Cook plasticity model along with a principal stress failure criterion calibrated with recently available experimental data. ... |
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| A Gimbaled Platform for Micro Aerial Vehicle Autopilot Simulation and Calibration |
Mar-2009 |
24 pages |
| Authors:
Justin L Shumaker; Kamal S Ali; Lamarious Carter; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD VEHICLE TECHNOLOGY DIRECTORATE
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| This report describes a 3-degrees-of-freedom gimbaled platform designed to be used as a hardware in the loop simulator. This platform is designed to aid in the calibration and synchronization of micro aerial vehicles' autopilot components. This platform can also be used as a simulator allowing the autopilot to fly a computer model of the airframe. This allows for the quick and efficient verification of autopilot behavior with different airframes under ... |
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| Hyperspectral Imaging of a Turbine Engine Exhaust Plume to Determine Radiance, Temperature, and Concentration Spatial Distributions |
Mar-2009 |
155 pages |
| Authors:
Spencer J Bowen; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
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| The usefulness of imaging Fourier transform spectroscopy (IFTS) when looking at a rapidly varying turbine engine exhaust scene was explored by characterizing the scene change artifacts (SCAs) present in the plume and the effect they have on the calibrated spectra using the Telops, Inc.-manufactured Field-portable Imaging Radiometric Spectrometer Technology, Midwave Extended (FIRST-MWE). It was determined that IFTS technology can be applied to the problem of a rapidly varying turbine engine ... |
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| A Comparative Study of the Bidirectional Reflectance Distribution Function of Several Surfaces as a Mid-wave Infrared Diffuse Reflectance Standard |
Mar-2009 |
198 pages |
| Authors:
Bradley Balling; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
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| The Bi-Directional Reflectance Distribution Function (BRDF) has a well defined diffuse measurement standard in the ultraviolet, visible, and near infrared (NIR), Spectralon(trade name). It is predictable, stable, repeatable, and has low surface variation because it is a bulk scatterer. In the mid-wave IR (MWIR) and long-wave IR (LWIR), there is not such a well-defined standard. There are well-defined directional hemispherical reflectance (DHR) standards, but the process of integrating BRDF measurements ... |
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| Suite of Standards for Electromagnetic Material Characterization Using Mode Matching Theory |
Mar-2009 |
114 pages |
| Authors:
Brian Witthoeft; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
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| The objective of this research is to determine if an acceptable standard can be developed to access the accuracy and precision of measurements taken using waveguide systems. Tiny changes in material fabrication, processing, and environment can cause problems with accuracy and precision in measurement. There is a great deal of research on uncertainty analysis in the literature. A large portion of the effort will be to determine the levels of ... |
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| Dislocation Dynamic Modeling in High Temperature Single Crystal Viscoplasticity (Preprint) |
Mar-2009 |
5 pages |
| Authors:
Brice N Cassenti; Alexander Staroselsky; PRATT AND WHITNEY EAST HARTFORD CT
|
| We have developed a crystallographic-based viscoplastic model for nonisothermal high temperature deformation and coupled it with damage kinetics. Several damage mechanisms, namely the multiplication of mobile dislocations, void growth and including scale effects, caused by dislocation extrusions/intrusions, have been considered. We applied two body interaction concepts from chemical kinetics to include in our constitutive relations the generation and interaction of pinned and mobile dislocations. The relative importance of each of ... |
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| Magnetic Field Probes for use in Radio Frequency Plasma (Preprint) |
24-Feb-2009 |
15 pages |
| Authors:
William Lewis; Michael P Reilly; George H Miley; ILLINOIS UNIV AT URBANA-CHAMAPAIGN
|
| An impedance analyzer has been used in the characterization of a magnetic induction probe (B-dot probe) for use in plasma. The role of the impedance analyzer was to determine the frequency response of a B-dot probe up to 100 MHz. The probe was specifically designed to take measurements in RF plasma driven at 13.56 MHz. Probe sensitivity and calibration are considered based on the impedance values obtained when a B-dot ... |
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| Crosstalk: The Journal of Defense Software Engineering. Volume 22, Number 2, February 2009 |
Feb-2009 |
33 pages |
| Authors:
Kasey Thompson; Kristin Baldwin; Joan Johnson; Karl Rogers; Joel Jarzombeck; Brent Baxter; Drew Brown; Chelene Fortier-Lozancich; Nicole Kentta; SOFTWARE TECHNOLOGY SUPPORT CENTER HILL AFB UT
|
| Service-oriental architecture (SOA) builds on computer engineering approaches of the past to offer an architectural approach for enterprise systems, oriented around offering services on a network of consumers. For federal senior leadership teams, it offers a path forward, allowing for incremental and focused improvement of their IT support systems. With thoughtful engineering and an enterprise point of view, SOA offers positive benefits such as language neutral integration, component reuse, organizational ... |
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| Rapid Fuel Quality Surveillance Through Chemometric Modeling of Near-Infrared Spectra |
Jan-2009 |
|
| Authors:
Mark H Hammond; Jeffrey A Cramer; Robert E Morris; Kevin J Johnson; Braden C Giordano; Kirsten E Kramer; Susan L Rose-Pehrsson; NAVAL RESEARCH LAB WASHINGTON DC CHEMISTRY DIV
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| The use of liquid fuels necessitates methods to assess the quality and suitability of these fuels for their intended use. Traditionally, this is performed through a series of chemical and physical tests. However, in some operational situations, streamlined methods to reliably evaluate fuel quality would offer distinct advantages. The Naval Research Laboratory has been engaged in a research program to explore and develop rapid automated fuel quality surveillance technologies. Chemometric ... |
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| A Note on NCOM Temperature Forecast Error Calibration Using the Ensemble Transform |
Jan-2009 |
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| Authors:
Gregg Jacobs; Clark Rowley; Emanuel Coelho; Richard Allard; Germana Peggion; Elaina Rodriguez; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
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| During the MREA07 trial, off the NW coast of Italy in the late spring and summer of 2007, Navy Coastal Ocean Modeling (NCOM) multiple nests free-run ensembles were made available in real-time for the LASIE07 and BP07 events and a fairly complete set of observations were collected inside the inner nests domains. This note addresses the problem of predicting NCOM local unbiased 0-24 h forecast errors by perturbing a limited ... |
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| Testing and Evaluation of a Pen Input Device Using an Inertial/Magnetic Sensor Module |
Dec-2008 |
81 pages |
| Authors:
Leonidas Drakopoulos; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| In this thesis, the feasibility of developing a pen input device using an inertial/magnetic sensor module is investigated. The emphasis is on testing and evaluation of algorithms for computing handwriting trajectories based on accelerometer measurement data. This research starts by placing the inertial/magnetic sensor in a 2-D plane and writing alphanumeric characters. Before continuing to evaluate the 3-D writing, a calibration algorithm is implemented for computing the length between the ... |
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| Expanding Coherent Array Processing to Larger Apertures Using Empirical Matched Field Processing |
30-Sep-2008 |
8 pages |
| Authors:
Frode Ringdal; Tormod Kvaerna; David B Harris; Steven J Gibbons; NORWEGIAN SEISMIC ARRAY (NORSAR) KJELLER
|
| The objectives of this project are: (1) To investigate the limits of empirical matched field processing and other coherent array detection and parameter estimation methods as receiver aperture size increases from a few kilometers to many hundreds of kilometers. (2) To investigate techniques for extending the geographical source-region footprint over which empirical matched field processing and other coherent calibrated methods apply. Under a previous contract, we demonstrated the ability of ... |
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| Finite-Frequency Seismic Tomography of Body Waves and Surface Waves from Ambient Seismic Noise: Crustal and Mantle Structure Beneath Eastern Eurasia |
30-Sep-2008 |
11 pages |
| Authors:
Wei Zhang; Xiaoping Yang; Yong Ren; Ting Yang; Yang Shen; SCIENCE APPLICATIONS INTERNATIONAL CORP SAN DIEGO CA
|
| To improve seismic calibration for nuclear explosion monitoring, we use 3D sensitivity kernels of finite-frequency body and surface waves to develop models of the crustal and mantle structures beneath eastern Eurasia. We have collected and processed available broadband data from both permanent stations and temporary networks in eastern Eurasia. We obtained a regional P-wave velocity model for the mantle structures down to 1,500 km beneath the eastern Eurasia. We also ... |
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| Seismic Source Scaling and Discrimination in Diverse Tectonic Environments |
30-Sep-2008 |
11 pages |
| Authors:
Katherine Murphy; Rachel E Abercrombie; Kevin Mayeda; William R Walter; Gisela M Viegas; BOSTON UNIV MA
|
| The objectives of this study are to improve low-magnitude (concentrating on M2.5-5) regional seismic discrimination by performing a thorough investigation of earthquake source scaling using diverse, high-quality datasets from varied tectonic regions. Local-to-regional high-frequency discrimination requires an estimate of how earthquakes scale with size. Walter and Taylor (2002) developed the Magnitude and Distance Amplitude Corrections (MDAC) method to empirically account for these effects through regional calibration. The accuracy of these ... |
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| Calibrated Mid-wave Infrared (IR) (MidIR) and Long-wave IR (LWIR) Stokes and Degree-of-Liner Polarization (DOLP) |
01-Sep-2008 |
30 pages |
| Authors:
Melvin Felton; Kristan P Gurton; ARMY RESEARCH LAB ADELPHI MD COMPUTATIONAL AND INFORMATION SCIENCES DIRECTORATE
|
| We present radiometric and polarimetric calibrated imagery recorded in both the mid-wave infrared (IR) (MidIR) and long-wave IR (LWIR) as a function of diurnal variation over several multiday periods. We compare differences in polarimetric and conventional thermal imagery for both IR atmospheric transmission windows, i.e., the 3-5 mu and 8-12 mu regions. Meteorological parameters measured during the study include temperature, relative humidity, wind speed/direction, precipitation, and ambient atmospheric IR loading. ... |
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| Design and Implementation of an Active Calibration System for Weather Radars |
01-Sep-2008 |
177 pages |
| Authors:
Jason M Phillips; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Pulsed weather radars can be used to depict meteorological conditions such as rainfall rate and wind velocity. These quantities are calculated from measurements of reflectivity, mean radial velocity and velocity spread using echo signal samples from weather targets. These radar measurements derive from modified radio frequency (RF) echo signal parameters, including amplitude, frequency and phase, returned to the radar from the weather target. RF scattering and propagation effects modily echo ... |
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| Imaging With Magnification Test Procedure |
01-Sep-2008 |
18 pages |
| Authors:
Michael J Ferry; Shensky; William III; Andrew G Mott; ARMY RESEARCH LAB ADELPHI MD SENSORS AND ELECTRON DEVICES DIRECTORATE
|
| Although modern cameras have advanced to the point where pixel size approaches 4 microns, we have yet to achieve the submicron size necessary to accurately resolve focused laser beams. Present methods such as pinhole scans and knife edge scans assume spatial wave forms to fit the transmission, and those assumptions may be erroneous. This technical note details a method of imaging with calibrated magnification and commercial laser beam profiling software ... |
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| Field Programmable Gate Array-Based Attitude Stabilization |
01-Jul-2008 |
16 pages |
| Authors:
Michael J Uijt de Stepaniak; Maarten Van Haag; Frank Graas; OHIO UNIV ATHENS AVIONICS ENGINEERING CENTER
|
| A system for determining vehicle attitude using a field programmable gate array (FPGA) and low cost gyroscopes is presented. The method is intended to support the stabilization of a short duration, unmanned aerial vehicle. Using a microelectronmechanical system (MEMS) inertial sensor for the calibration and serial interface, the algorithm sidesteps concerns related to electronmagnetic interference and the impact of embedded, proprietary filters. An Allan variance analysis is used to characterize ... |
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| Evaluation of Residual Stress Relaxation in Surface-Treated Engine Alloys |
Jun-2008 |
24 pages |
| Authors:
Peter B Nagy; CINCINNATI UNIV OH DEPT OF AEROSPACE ENGINEERING AND APPLIED MECHANICS
|
| Recent research results indicate that eddy current conductivity measurements can be exploited for nondestructive evaluation of subsurface residual stresses in surface-treated nickel-base superalloy components. According to this approach, first the depth-dependent electric conductivity profile is calculated from the measured frequency-dependent apparent eddy current conductivity spectrum. Then, the residual stress depth profile is calculated from the conductivity profile based on the piezoresistivity coefficient of the material, which is determine separately from ... |
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| Analog Fiber Optic Link with DC-100 MHz Bandwidth |
30 MAY 2008 |
20 pages |
| Authors:
C. A. Sullivan; P. G. Girardi; Dieter R. Lohrmann; NAVAL RESEARCH LAB WASHINGTON DC SURFACE ELECTRONIC WARFARE SYSTEMS BRANCH
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| An analog fiber optic link covering the frequency range from DC to 100 MHz was designed, constructed, and tested, in order to connect a 10 kA pulse current probe to oscilloscopes for oscillographing laser filament induced arc currents. |
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| Test Operations Procedure (TOP) 7-3-057 Pitot-Static System Calibrations |
10 APR 2008 |
35 pages |
| Authors:
ARMY AVIATION TECHNICAL TEST CENTER FORT RUCKER AL
|
| This Test Operations Procedure (TOP) describes the test requirements, objectives, responsibilities, and techniques/methodologies required to perform pitot-static system calibrations. This TOP is used for rotary-wing and fixed-wing aircraft. The TOP will facilitate test planning, execution, and data collection using two techniques (trailing device and pace) and the equipment required to complete pitot-static system calibrations. Variations in platform requirements are discussed within this TOP. These guidelines, along with platform specific capabilities ... |
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| The Sixth Data Release of the Sloan Digital Sky Survey |
APR 2008 |
18 pages |
| Authors:
Jennifer K. Adelman-McCarthy; Marcel A. Agueros; Sahar S. Allam; Carlos A. Prieto; Kurt S. Anderson; Scott F. Anderson; James Annis; Neta A. Bahcall; C. A. Bailer-Jones; Ivan K. Baldry; FERMI NATIONAL ACCELERATOR LAB BATAVIA IL
|
| This paper describes the Sixth Data Release of the Sloan Digital Sky Survey. With this data release, the imaging of the northern Galactic cap is now complete. The survey contains images and parameters of roughly 287 million objects over 9583 deg2, including scans over a large range of Galactic latitudes and longitudes. The survey also includes 1.27 million spectra of stars, galaxies, quasars, and blank sky (for sky subtraction) selected ... |
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| Demonstration of GSSHA Hydrology at Goodwin Creek Experimental Watershed |
01-Mar-2008 |
10 pages |
| Authors:
Charles W Downer; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS
|
| The purpose of this System-Wide Water Resources (SWWRP) technical note is to describe the application of the Gridded Surface Subsurface Hydrologic Analysis (GSSHA) model at the Goodwin Creek Experimental Watershed (GCEW). The purpose of applying the model at this site was to confirm that the hydrologic portions of the code were working properly and were able to achieve accurate results. Application of GSSHA at this site also allows the current ... |
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| Constitutive Models for Nonlinear Finite Element Analysis of Masonry Prisms and Infill Walls |
Mar-2008 |
71 pages |
| Authors:
Ghassan L Al-Chaar; Armin Mehrabi; ENGINEER RESEARCH AND DEVELOPMENT CENTER CHAMPAIGN IL CONSTRUCTION ENGINEERING RESEARCH LAB
|
| After much previous research, many controversial issues related to well developed design recommendations and well accepted analytical procedures for infilled frames are still unresolved. The main difficulty in evaluating the performance of bearing and shear wall structures is determining the type of interaction between the infill and the frame, which has a major impact on the structural behavior and load-resisting mechanism. A simplified model that captures the characteristics of infill ... |
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| Error Analysis in the Joint Event Location/Seismic Calibration Inverse Problem |
15 FEB 2008 |
38 pages |
| Authors:
William L. Rodi; MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF EARTH ATMOSPHERIC AND PLANETARY SCIENCES
|
| The goal of this project was to develop new mathematical and computational techniques for quantifying the errors in seismic event locations, focusing on the effects of errors in travel-time predictions from a velocity model. Our approach associates these model errors with the uncertainty in path travel-time corrections inferred from a calibration analysis. The main accomplishment of the project was a general formulation of location uncertainty in terms of the joint ... |
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| Mechanical and Physical Properties of ASTM C33 Sand |
FEB 2008 |
39 pages |
| Authors:
Ernest S. Berney IV; Donald M. Smith; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS GEOTECHNICAL AND STRUCTURES LAB
|
| Determining the state of the ground is critical for Objective Force operations. Currently, no methods exist to remotely, and accurately, measure the near-surface soil properties (strength, density, compressibility, and texture) needed to define ground state. Analysis of low-velocity impact probe deceleration, obtained during penetration, is the most practical method to remotely determine ground state. Development of the physics describing the behavior of the impact requires in-depth knowledge of the physical ... |
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| Gas Chromatographic-Mass Spectrometric Analysis of Sulfur Mustard-Plasma Protein Adducts: Validation and Use in a Rat Inhalation Model |
Jan-2008 |
8 pages |
| Authors:
Benedict R Capacio; J R Smith; Richard J Lawrence; Brian L Boyd; Alicia M Witriol; Michele L Conti; Jennifer L Collins; Alfred M Sciuto; ARMY MEDICAL RESEARCH INST OF CHEMICAL DEFENSE ABERDEEN PROVING GROUND MD
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| Sulfur mustard (HD) is an alkylating agent that reacts rapidly with macromolecular targets resulting in the formation of stable adducts providing depots for markers of exposure. The purpose of this study was to validate an analytical procedure for detection of HD-plasma protein adducts and to establish the utility of the method in an HD rat inhalation study. Calibration curves were prepared in human and rat plasma at six levels of ... |
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| High Speed Imaging Chopper Polarimetry |
Jan-2008 |
38 pages |
| Authors:
Roy M Matchko; Grant R Gerhart; BATTELLE SCIENTIFIC SERVICES PROGRAM PAYSON AZ
|
| The Stokes method provides a seminal method for the determination of a state of polarization of a beam of light using measurable quantities. This paper presents a methodology for the rapid acquisition of the four Stokes parameters. We have been able to acquire images at the rate of 500 images per second using a high speed video camera. Using the high speed video camera, an optical chopper, a computer system ... |
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| Behavioral Responses of Odontocetes to Playback of Anthropogenic and Natural Sounds |
Jan-2008 |
|
| Authors:
Peter L Tyack; WOODS HOLE OCEANOGRAPHIC INSTITUTION MA
|
| The long-term goal of this research project is to safely study responses of beaked whales to naval sounds in order to understand the causal chain of events leading from sound exposure to risks of stranding and to measure the exposure required to elicit responses that are safe but indicate potential for risk. The project is designed to provide critical information required to develop measures to protect beaked and other whales ... |
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| Wavefront Control for Space Telescope Applications Using Adaptive Optics |
01 DEC 2007 |
109 pages |
| Authors:
Matthew R. Allen; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Future long dwell high resolution imagery satellites and space telescopes will require very large flexible primary mirrors. These large mirrors face many challenges including optical surface imperfections, structural vibrations, and jitter. A flexible mirror can overcome some of these challenges by applying adaptive optics techniques to correct mirror deformations and aberrations to produce image quality data. This paper examines and develops control techniques to control a deformable mirror subjected to ... |
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| Back Up Velocity Estimate Following Air Data System Failure (Project Have Vest) |
01 DEC 2007 |
59 pages |
| Authors:
Scott McLaren; Sreeram Jayashankar; William Rothermel; Corey Beaverson; Donny Powers; AIR FORCE TEST PILOT SCHOOL EDWARDS AFB CA
|
| This report presents the results of Project Have VEST, a limited evaluation of a back up velocity estimate following air data system failure. This test program demonstrated the potential of the VEST algorithm to provide an airspeed estimate using aircraft last known state and flight control computer accelerations and rates. The USAF Test Pilot School (TPS), Class 07A, conducted six flight tests totaling 11.3 hours at Edwards AFB, California, from ... |
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| Mission Support for the Communication/Navigation Outage Forecast System (C/NOFS) Satellite |
21-Nov-2007 |
23 pages |
| Authors:
David L Hysell; CORNELL UNIV ITHACA NY DEPT OF EARTH AND ATMOSPHERIC SCIENCES
|
| Cornell University supported the Air Force Research Laboratory C/NOFS mission through a combination of experiment development, data acquisition and processing, simulation, and modeling of ionospheric processes pertinent to forecasting so-called equatorial spread F phenomena. A new radar mode capable of providing simultaneous plasma density and drift measurements in the equatorial ionosphere has been developed and implemented at the Jicamarca Radio Observatory. The new mode will be crucial for C/NOFS calibration/validation ... |
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| Test Operations Procedure (TOP) 5-2-521 Pyrotechnic Shock Test Procedures |
20 NOV 2007 |
33 pages |
| Authors:
ARMY WHITE SANDS TEST CENTER WHITE SANDS MISSILE RANGE NEW MEXICO SURVIVABILITY VULNERABILITY AND ASSESSMENT DIRECTORATE (SVAD)
|
| This TOP provides guidance for the laboratory simulation of pyrotechnic shock tests via resonant fixtures. The pyrotechnic event is characterized by short transient excitations (less than 4 msec) of high amplitude (3000 g's) and high frequencies (10 kHz). The transients are typically induced by the activation of missile ordnance components such as explosive bolts, cable cutters, pyrovalves, flexible linear shape charges, and primer cords. This document describes instrumentation, test fixture ... |
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| Evaluation of Carrier-Phase GNSS Timing Receivers for UTC/TAI Applications |
01-Nov-2007 |
9 pages |
| Authors:
Blair Fonville; Edward Powers; Anton Kropp; Francine Vannicola; NAVAL OBSERVATORY WASHINGTON DC
|
| USNO evaluated several carrier-phase GNSS timing receivers to determine their suitability to support UTC/TAI applications. These receivers were subjected to thermal testing, power cycle retrace testing, and long-term stability evaluation. The goal is to identify candidate replacement receivers for the USNO to be used for UTC/TAI applications, including the common-view technique for both GPS and GLONASS monitoring. Test results are reported in this paper. |
|
| Long-Baseline Comparisons of the Brazilian National Time Scale to UTC (NIST) Using Near Real-Time and Postprocessed Solutions |
01-Nov-2007 |
13 pages |
| Authors:
Michael A Lombardi; Victor S Zhang; Carvalho; Ricardo J de; NATIONAL INST OF STANDARDS AND TECHNOLOGY BOULDER CO TIME AND FREQUENCY DIV
|
| We present the results of C/A code common-view Global Positioning System (GPS) comparisons between the UTC (NIST) time scale, located at the National Institute of Standards and Technology (NIST) in Boulder, Colorado, and the Brazilian national time scale, UTC(ONRJ), located at the National Observatory (ONRJ) in Rio de Janeiro, Brazil. The two time scales are separated by a long baseline of approximately 8600 km. The comparisons were made with measurement ... |
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| Combination of GPS PPP and Two-Way Time Transfer for TAI Computation |
01-Nov-2007 |
9 pages |
| Authors:
Z Jiang; G Petit; BUREAU INTERNATIONAL DES POIDS ET MESURES SEVRES (FRANCE)
|
| To follow the CCTF 2006 recommendation of using high-precision GPS carrier-phase data (CP) for TAI generation, BIPM computes monthly the GPS PPP (Precise Point Positioning) time links and publishes the result on the TAI ftp site. The GPS PPP is a combined solution of the codes and CP information. The latter assigns the high precision to the PPP result. It is shown that the PPP links have a better time ... |
|
| About Compass Time and Its Coordination with Other GNSSs |
01-Nov-2007 |
7 pages |
| Authors:
Xiaohui Li; Shaowu Dong; Haitao Wu; CHINESE ACADEMY OF SCIENCES SHAANXI (CHINA) NATIONAL TIME SERVICE CENTER
|
| Compass is the global satellite navigation system of China, which is in the process of construction. The first test satellite was lunched on 17 April 2007. As timekeeping infrastructure is the most important part for a GNSS system, the traceability of Compass system time (named BDT) and its coordination with other GNSSs are discussed, as is the possible link from Compass time to national standard time. The National Time Service ... |
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| Interhourly Variability Index of Geomagnetic Activity and Its Use in Deriving the Long-Term Variation of Solar Wind Speed |
31 OCT 2007 |
33 pages |
| Authors:
Leif Svalgaard; Edward W. Cliver; AIR FORCE RESEARCH LAB HANSCOM AFB MA
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| [1] We describe the detailed derivation of the interhourly variability (IHV) index of geomagnetic activity. The IHV index for a given geomagnetic element is mechanically derived from hourly values or means as the sum of the unsigned differences between adjacent hours over a 7-hour interval centered on local midnight The index is derived separately for stations in both hemispheres within six longitude sectors spanning the Earth using only local night ... |
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| Standardized UXO Technology Demonstration Site Blind Grid Scoring Record #833 |
OCT 2007 |
44 pages |
| Authors:
Rick Fling; Christina McClung; William Burch; Patrick McDonnell; ARMY DEVELOPMENT TEST COMMAND ABERDEEN PROVING GROUND MD
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| This Scoring Record documents the efforts of NAEVA Geophysics, Inc., to detect and discriminate inert unexploded ordnance (UXO) utilizing the APG Standardized UXO Technology Demonstration Site Blind Grid. This Scoring Record was coordinated by Dennis Teefy and the Standardized UXO Technology Demonstration Site Scoring Committee. Organizations on the committee include the U.S. Army Corps of Engineers, the Environmental Security Technology Certification Program, the Strategic Environmental Research and Development Program, the ... |
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| Multi-Camera, High-Speed Imaging System for Kinematics Data Collection |
21 SEP 2007 |
14 pages |
| Authors:
Jason Geder; William C. Sandberg; Ravi Ramamurti; NAVAL RESEARCH LAB WASHINGTON DC
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| A two-camera system was devised and created to determine the kinematics of flapping fin and flapping wing vehicles. Each camera is set up to capture triggered, high-speed (up to 10,000 frames per second) images of the appendage in a test environment. Using direct linear transforms, each camera is calibrated to convert image coordinates to an alternate coordinate system. Points of interest on the appendage are selected from each camera image ... |
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| Predictive Model Assessment for Count Data |
05 SEP 2007 |
20 pages |
| Authors:
Claudia Czado; Tilmann Gneiting; Leonhard Held; WASHINGTON UNIV SEATTLE DEPT OF STATISTICS
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| We discuss tools for the evaluation of probabilistic forecasts and the critique of statistical models for ordered discrete data. Our proposals include a non-randomized version of the probability integral transform, marginal calibration diagrams and proper scoring rules, such as the predictive deviance. In case studies, we critique count regression models for patent data, and assess the predictive performance of Bayesian age-period-cohort models for larynx cancer counts in Germany. Key words: ... |
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