[Military man looking out the helicopter window]

[Military man looking out the helicopter window]

Date: 19uu
Creator: Clark, Joe & Clark, Joseph Wade Junebug
Description: Photograph of an unidentified man looking out the window of a helicopter. The man is wearing a pilot's helmet and there is a dual propeller, Chinook, helicopter in the air outside of the window.
Contributing Partner: UNT Libraries Special Collections
VH-71/VXX Presidential Helicopter Program: Background and Issues for Congress

VH-71/VXX Presidential Helicopter Program: Background and Issues for Congress

Date: December 22, 2009
Creator: Gertler, Jeremiah J.
Description: This report discusses the VH-71 program, which is intended to provide 23 new presidential helicopters to replace the current fleet of 19 aging presidential helicopters.
Contributing Partner: UNT Libraries Government Documents Department
VH-71 Presidential Helicopter Program: Background and Issues for Congress

VH-71 Presidential Helicopter Program: Background and Issues for Congress

Date: July 13, 2009
Creator: O'Rourke, Ronald
Description: This report discusses the VH-71 program, which is intended to provide 23 new presidential helicopters to replace the current fleet of 19 aging presidential helicopters.
Contributing Partner: UNT Libraries Government Documents Department
V-22 Osprey Tilt-Rotor Aircraft: Background and Issues for Congress

V-22 Osprey Tilt-Rotor Aircraft: Background and Issues for Congress

Date: March 10, 2011
Creator: Gertler, Jeremiah
Description: This report discusses background information on the V-22 Osprey Tilt-Rotor Aircraft, as well as procurement issues for FY2012 and related oversight issues for Congress.
Contributing Partner: UNT Libraries Government Documents Department
VH-71 Presidential Helicopter Program: Background and Issues for Congress

VH-71 Presidential Helicopter Program: Background and Issues for Congress

Date: June 9, 2009
Creator: Gertler, Jeremiah J.
Description: This report discusses the VH-71 program, which is intended to provide 23 new presidential helicopters to replace the current fleet of 19 aging presidential helicopters.
Contributing Partner: UNT Libraries Government Documents Department
An aerial radiological survey of Project Gasbuggy and surrounding area, Rio Arriba County, New Mexico. Date of survey: October 27, 1994

An aerial radiological survey of Project Gasbuggy and surrounding area, Rio Arriba County, New Mexico. Date of survey: October 27, 1994

Date: August 1, 1995
Creator: unknown
Description: An aerial radiological survey was conducted over the Project Gasbuggy site, 55 miles (89 kilometers) east of Farmington, New Mexico, on October 27, 1994. Parallel lines were flown at intervals of 300 feet (91 meters) over a 16-square-mile (41-square-kilometer) area at a 150-foot (46-meter) altitude centered on the Gasbuggy site. The gamma energy spectra obtained were reduced to an exposure rate contour map overlaid on a high altitude aerial photograph of the area. The terrestrial exposure rate varied from 14 to 20 {micro}R/h at 1 meter above ground level. No anomalous or man-made isotopes were found.
Contributing Partner: UNT Libraries Government Documents Department
VH-71 Presidential Helicopter Program

VH-71 Presidential Helicopter Program

Date: March 5, 2009
Creator: Bolkcom, Christopher
Description: This report discusses VH-71 presidential helicopter, which has experienced noteworthy cost increases and schedule delays, which have generated controversy and scrutiny. The VH-71 is intended to replace the President's current operational fleet of helicopters, consisting of 11 VH-3D Sea Kings and 8 VH-60N Night Hawks.
Contributing Partner: UNT Libraries Government Documents Department
Geophex airborne unmanned survey system

Geophex airborne unmanned survey system

Date: March 1, 1995
Creator: Won, I.J. & Taylor, D.W.A.
Description: The purpose of this effort is to design, construct, and evaluate a portable, remotely-piloted, airborne, geophysical survey system. This nonintrusive system will provide {open_quotes}stand-off{close_quotes} capability to conduct surveys and detect buried objects, structures, and conditions of interest at hazardous locations. This system permits two operators to rapidly conduct geophysical characterization of hazardous environmental sites. During a survey, the operators remain remote from, but within visual distance, of, the site. The sensor system never contacts the Earth, but can be positioned near the ground so that weak anomalies can be detected.
Contributing Partner: UNT Libraries Government Documents Department
Geophex Airborne Unmanned Survey System

Geophex Airborne Unmanned Survey System

Date: December 31, 1995
Creator: Won, I.L. & Keiswetter, D.
Description: Ground-based surveys place personnel at risk due to the proximity of buried unexploded ordnance (UXO) items or by exposure to radioactive materials and hazardous chemicals. The purpose of this effort is to design, construct, and evaluate a portable, remotely-piloted, airborne, geophysical survey system. This non-intrusive system will provide stand-off capability to conduct surveys and detect buried objects, structures, and conditions of interest at hazardous locations. During a survey, the operators remain remote from, but within visual distance of, the site. The sensor system never contacts the Earth, but can be positioned near the ground so that weak geophysical anomalies can be detected. The Geophex Airborne Unmanned Survey System (GAUSS) is designed to detect and locate small-scale anomalies at hazardous sites using magnetic and electromagnetic survey techniques. The system consists of a remotely-piloted, radio-controlled, model helicopter (RCH) with flight computer, light-weight geophysical sensors, an electronic positioning system, a data telemetry system, and a computer base-station. The report describes GAUSS and its test results.
Contributing Partner: UNT Libraries Government Documents Department
Geophex Airborne Unmanned Survey System (GAUSS). Topical report, October 1993--March 1995

Geophex Airborne Unmanned Survey System (GAUSS). Topical report, October 1993--March 1995

Date: March 1, 1995
Creator: unknown
Description: The objectives of the project are to construct a geophysical sensor system based on a remotely operated model helicopter (ROH) and to evaluate the efficacy of the system for characterization of hazardous environmental sites. Geophex Airborne Unmanned Survey System (GAUSS) is a geophysical survey system that uses a ROH as the survey vehicle. We have selected the ROH because of its advantages over fixed wing and ground based vehicles. Lower air speed and superior maneuverability of the ROH make it better suited for geophysical surveys than a fixed wing model aircraft. The ROH can fly close to the ground, allowing detection of weak or subtle anomalies. Unlike ground based vehicles, the ROH can traverse difficult terrain while providing a stable sensor platform. ROH does not touch the ground during the course of a survey and is capable of functioning over water and surf zones. The ROH has been successfully used in the motion picture industry and by geology companies for payload bearing applications. The only constraint to use of the airborne system is that the ROH must remain visible to the pilot. Obstructed areas within a site can be characterized by relocating the base station to alternate positions. GAUSS consists ...
Contributing Partner: UNT Libraries Government Documents Department
EM experiments for computational model validation for AH-1S Cobra Helicopter

EM experiments for computational model validation for AH-1S Cobra Helicopter

Date: April 6, 1997
Creator: Nelson, S.D.
Description: The effort described here describes a set of outdoor experiments performed on the AH-1S Cobra helicopter in order to validate and compare to the computational electromagnetic models of the bulk structure of the airframe in the frequency bands up to 4 GHz. Also included in this were coupling measurements to wires and cables inside of the airframe and various cavity to HPM pulse in this frequency range as part of other activities. Additionally, the low power modeling compression will be completed in this time frame.
Contributing Partner: UNT Libraries Government Documents Department
Modeling of Air Attenuation Effects on Gamma Detection at Altitude

Modeling of Air Attenuation Effects on Gamma Detection at Altitude

Date: October 1, 2002
Creator: Detwiler, R. S.
Description: This paper focuses on modeling the detection capabilities of NaI sensor systems at high altitudes for ground sources. The modeling was done with the Monte Carlo N-Transport (MCNP) code developed at Los Alamos National Laboratory. The specific systems modeled were the fixed wing and helicopter aircraft sensor systems, assets of the U. S. Department of Energy's National Nuclear Security Administration Nevada Operations Office (NNSA/NV) Aerial Measuring System (AMS). In previous (2001) modeling, Sodium Iodine (NaI) detector responses were simulated for both point and distributed surface sources as a function of gamma energy and altitude. For point sources, photo-peak efficiencies were calculated for a zero radial distance and an offset equal to the altitude. For distributed sources approximating an infinite plane, gross count efficiencies were calculated and normalized to a uniform surface deposition of 1 {micro}Ci/m{sup 2}. To validate the calculations, benchmark measurements were made for simple source-detector configurations. The 2002 continuation of the modeling presented here includes checking models against available data, and modifications to allow more effective and accurate directional biasing of ground point and distributed sources. Fixed-wing data results will be shown for two point sources as a function of altitude.
Contributing Partner: UNT Libraries Government Documents Department
Geometric Correction System Capabilities, Processing, and Application

Geometric Correction System Capabilities, Processing, and Application

Date: June 30, 1999
Creator: Brewster, S. B.
Description: The U.S. Department of Energy's Remote Sensing Laboratory developed the geometric correction system (GCS) as a state-of-the-art solution for removing distortions from multispectral line scanner data caused by aircraft motion. The system operates on Daedalus AADS-1268 scanner data acquired from fixed-wing and helicopter platforms. The aircraft attitude, altitude, acceleration, and location are recorded and applied to the data, thereby determining the location of the earth with respect to a given datum and projection. The GCS has yielded a positional accuracy of 0.5 meters when used with a 1-meter digital elevation model. Data at this level of accuracy are invaluable in making precise areal estimates and as input into a geographic information system. The combination of high-spatial resolution and accurate geo-rectification makes the GCS a unique tool in identifying and locating environmental conditions, finding targets of interest, and detecting changes as they occur over time.
Contributing Partner: UNT Libraries Government Documents Department
Helicopter Crash Frequency

Helicopter Crash Frequency

Date: March 1990
Creator: Brandyberry, M. D.
Description: The risk from helicopter crashes into K-Reactor structures and systems is found to be a negligible contributor to risk.
Contributing Partner: UNT Libraries Government Documents Department
Demonstration of the Military Ecological Risk Assessment Framework (MERAF): Apache Longbow - Hell Missile Test at Yuma Proving Ground

Demonstration of the Military Ecological Risk Assessment Framework (MERAF): Apache Longbow - Hell Missile Test at Yuma Proving Ground

Date: May 9, 2002
Creator: Efroymson, R.A.
Description: This ecological risk assessment for a testing program at Yuma Proving Ground, Arizona, is a demonstration of the Military Ecological Risk Assessment Framework (MERAF; Suter et al. 2001). The demonstration is intended to illustrate how risk assessment guidance concerning-generic military training and testing activities and guidance concerning a specific type of activity (e.g., low-altitude aircraft overflights) may be implemented at a military installation. MERAF was developed with funding from the Strategic Research and Development Program (SERDP) of the Department of Defense. Novel aspects of MERAF include: (1) the assessment of risks from physical stressors using an ecological risk assessment framework, (2) the consideration of contingent or indirect effects of stressors (e.g., population-level effects that are derived from habitat or hydrological changes), (3) the integration of risks associated with different component activities or stressors, (4) the emphasis on quantitative risk estimates and estimates of uncertainty, and (5) the modularity of design, permitting components of the framework to be used in various military risk assessments that include similar activities. The particular subject of this report is the assessment of ecological risks associated with a testing program at Cibola Range of Yuma Proving Ground, Arizona. The program involves an Apache Longbow helicopter firing ...
Contributing Partner: UNT Libraries Government Documents Department
EM field and instrumentation diagnostics in support of the LFT&E HPM methodology testing

EM field and instrumentation diagnostics in support of the LFT&E HPM methodology testing

Date: September 4, 1997
Creator: Anderson, R. A. & Nelson, S. D.
Description: The Naval Air Warfare Center, China Lake, under the direction of the DOD LFT&E Office performed a series of HPM tests for the purpose of exercising the HPM methodology for LFT&E applications. An AH-1S Cobra helicopter was used as the canonical test bed. The Air Force Research Lab (formally Phillips Lab) provided the wide-band source and the Army Research Lab provided the narrow-band used in the tests. LLNL provided the EM diagnostics used at the site for both test series. Our mission was to measure the radiated field from the sources, measure the fields inside the helicopter and the coupling onto various signal lines inside the helicopter, and to monitor the various system signal levels for �bird health� purposes. These experiments were performed during June of 1997 and consisted of exposing the test bed to a series of narrow-band and wide-band pulses from HPM sources. This report covers the measured radiated fields, the fields inside the helicopter, and the coupled signal levels. The radiated fields were measured over a region which spans the physical body of the helicopter. The fields inside the helicopter and the coupled fields were measured using a series of probes inside the helicopter and connected to ...
Contributing Partner: UNT Libraries Government Documents Department
Corrosion detection in multi-layered rotocraft structures

Corrosion detection in multi-layered rotocraft structures

Date: April 25, 2000
Creator: ROACH,DENNIS P.; WALKINGTON,PHILLIP D.; HOHMAN,ED & MARSHALL,GREG
Description: Rotorcraft structures do not readily lend themselves to quantifiable inspection methods due to airframe construction techniques. Periodic visual inspections are a common practice for detecting corrosion. Unfortunately, when the telltale signs of corrosion appear visually, extensive repair or refurbishment is required. There is a need to nondestructively evaluate airframe structures in order to recognize and quantify corrosion before visual indications are present. Nondestructive evaluations of rotorcraft airframes face inherent problems different from those of the fixed wing industry. Most rotorcraft lap joints are very narrow, contain raised fastener heads, may possess distortion, and consist of thinner gage materials ({approximately}0.012--0.125 inches). In addition the structures involve stack-ups of two and three layers of thin gage skins that are separated by sealant of varying thickness. Industry lacks the necessary data techniques, and experience to adequately perform routine corrosion inspection of rotorcraft. In order to address these problems, a program is currently underway to validate the use of eddy current inspection on specific rotorcraft lap joints. Probability of detection (POD) specimens have been produced that simulate two lap joint configurations on a model TH-57/206 helicopter. The FAA's Airworthiness Assurance Center (AANC) at Sandia Labs and Bell Helicopter have applied single and dual frequency ...
Contributing Partner: UNT Libraries Government Documents Department
USE OF THE AERIAL MEASUREMENT SYSTEM HELICOPTER EMERGENCY RESPONSE ACQUISITION SYSTEMS WITH GEOGRAPHIC INFORMATION SYSTEM FOR RADIOACTIVE SOIL REMEDIATION - [11504]

USE OF THE AERIAL MEASUREMENT SYSTEM HELICOPTER EMERGENCY RESPONSE ACQUISITION SYSTEMS WITH GEOGRAPHIC INFORMATION SYSTEM FOR RADIOACTIVE SOIL REMEDIATION - [11504]

Date: February 15, 2011
Creator: CT, BROCK
Description: The Aerial Measurement System (AMS) Helicopter Emergency Response Acquisition System provides a thorough and economical means to identify and characterize the contaminants for large area radiological surveys. The helicopter system can provide a 100-percent survey of an area that qualifies as a scoping survey under the Multi-Agency Radiation Survey and Site Investigation Manual (MARSSIM) methodology. If the sensitivity is adequate when compared to the clean up values, it may also be used for the characterization survey. The data from the helicopter survey can be displayed and manipulated to provide invaluable data during remediation activities.
Contributing Partner: UNT Libraries Government Documents Department
INTERPRETATION OF AIRBORNE ELECTROMAGNETIC AND MAGNETIC DATA IN THE 600 AREA

INTERPRETATION OF AIRBORNE ELECTROMAGNETIC AND MAGNETIC DATA IN THE 600 AREA

Date: November 11, 2010
Creator: GD, CUMMINS
Description: As part of the 200-PO-1 Phase I geophysical surveys, Fugro Airborne Surveys was contracted to collect airborne electromagnetic (EM) and magnetic surveys of the Hanford Site 600 Area. Two helicopter survey systems were used with the HeliGEOTEM{reg_sign} time domain portion flown between June 19th and June 20th, 2008, and the RESOLVE{reg_sign} frequency domain portion was flown from June 29th to July 1st, 2008. Magnetic data were acquired contemporaneously with the electromagnetic surveys using a total-field cesium vapor magnetometer. Approximately 925 line kilometers (km) were flown using the HeliGEOTEM{reg_sign} II system and 412 line kilometers were flown using the RESOLVE{reg_sign} system. The HeliGEOTEM system has an effective penetration of roughly 250 meters into the ground and the RESOLVE system has an effective penetration of roughly 60 meters. Acquisition parameters and preliminary results are provided in SGW-39674, Airborne Electromagnetic Survey Report, 200-PO-1 Groundwater Operable Unit, 600 Area, Hanford Site. Airborne data are interpreted in this report in an attempt to identify areas of likely preferential groundwater flow within the aquifer system based on the presence of paleochannels or fault zones. The premise for the interpretation is that coarser-grained intervals have filled in scour channels created by episodic catastrophic flood events during the ...
Contributing Partner: UNT Libraries Government Documents Department
An Aerial Radiological Survey of the Portsmouth Gaseous Diffusion Plant and Surrounding Area, Portsmouth, Ohio

An Aerial Radiological Survey of the Portsmouth Gaseous Diffusion Plant and Surrounding Area, Portsmouth, Ohio

Date: December 1, 2007
Creator: Moon, Namdoo
Description: An aerial radiological survey was conducted over the 16 square-mile (~41 square-kilometer) area surrounding the Portsmouth Gaseous Diffusion Plant. The survey was performed in August 2007 utilizing a large array of helicopter mounted sodium iodide detectors. The purpose of the survey was to update the previous radiological survey levels of the environment and surrounding areas of the plant. A search for a missing radium-226 source was also performed. Implied exposure rates, man-made activity, and excess bismuth-214 activity, as calculated from the aerial data are presented in the form of isopleth maps superimposed on imagery of the surveyed area. Ground level and implied aerial exposure rates for nine specific locations are compared. Detected radioisotopes and their associated gamma ray exposure rates were consistent with those expected from normal background emitters. At specific plant locations described in the report, man-made activity was consistent with the operational histories of the location. There was no spectral activity that would indicate the presence of the lost source.
Contributing Partner: UNT Libraries Government Documents Department
[News Clip: Military deaths]

[News Clip: Military deaths]

Date: 2005-06-13T05:00:00
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Description: Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany an unknown news story. Footage shows a military medical helicopter and many vehicles on a desert road. There is also a press meeting with the Combined Forces Command in Afghanistan.
Contributing Partner: UNT Libraries Special Collections
Using Helicopter Electromagnetic Surveys to Identify Potential Hazards at Mine Waste Impoundments

Using Helicopter Electromagnetic Surveys to Identify Potential Hazards at Mine Waste Impoundments

Date: January 1, 2008
Creator: Hammack, R.W.
Description: In July 2003, helicopter electromagnetic surveys were conducted at 14 coal waste impoundments in southern West Virginia. The purpose of the surveys was to detect conditions that could lead to impoundment failure either by structural failure of the embankment or by the flooding of adjacent or underlying mine works. Specifically, the surveys attempted to: 1) identify saturated zones within the mine waste, 2) delineate filtrate flow paths through the embankment or into adjacent strata and receiving streams, and 3) identify flooded mine workings underlying or adjacent to the waste impoundment. Data from the helicopter surveys were processed to generate conductivity/depth images. Conductivity/depth images were then spatially linked to georeferenced air photos or topographic maps for interpretation. Conductivity/depth images were found to provide a snapshot of the hydrologic conditions that exist within the impoundment. This information can be used to predict potential areas of failure within the embankment because of its ability to image the phreatic zone. Also, the electromagnetic survey can identify areas of unconsolidated slurry in the decant basin and beneath the embankment. Although shallow, flooded mineworks beneath the impoundment were identified by this survey, it cannot be assumed that electromagnetic surveys can detect all underlying mines. A preliminary ...
Contributing Partner: UNT Libraries Government Documents Department
Helicopter Surveys for Locating Wells and Leaking Oilfield Infrastructure

Helicopter Surveys for Locating Wells and Leaking Oilfield Infrastructure

Date: October 1, 2006
Creator: Hammack, R.W.; Veloski, G.A. & Hodges, G. (Fugro Airborne Surveys)
Description: Prior to the injection of CO2 into geological formations, either for enhanced oil recovery or for CO2 sequestration, it is necessary to locate wells that perforate the target formation and are within the radius of influence for planned injection wells. Locating and plugging wells is necessary because improperly plugged well bores provide the most rapid route for CO2 escape to the surface. This paper describes the implementation and evaluation of helicopter and ground-based well detection strategies at a 100+ year old oilfield in Wyoming where a CO2 flood is planned. This project was jointly funded by the U.S. Department of Energy’s National Energy Technology Laboratory and Fugro Airborne Surveys
Contributing Partner: UNT Libraries Government Documents Department
New Strategies for Finding Abandoned Wells at Proposed Geologic Storage Sites for CO2

New Strategies for Finding Abandoned Wells at Proposed Geologic Storage Sites for CO2

Date: September 1, 2007
Creator: Hammack, R.W. & Veloski, G.A.
Description: Prior to the injection of CO2 into geological formations, either for enhanced oil recovery or for CO2 sequestration, it is necessary to locate wells that perforate the target formation and are within the radius of influence for planned injection wells. Locating and plugging wells is necessary because improperly plugged well bores provide the most rapid route for CO2 escape to the surface. This paper describes the implementation and evaluation of helicopter and ground-based well detection strategies at a 100+ year old oilfield in Wyoming where a CO2 flood is planned. This project was jointly funded by the U.S. Department of Energy’s National Energy Technology Laboratory and Fugro Airborne Surveys.
Contributing Partner: UNT Libraries Government Documents Department
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