| Feasibility of a Hand-Held Integrating Dosimeter Using a Cadmium Telluride Detector |
26 SEP 86 |
83 pages |
| Authors:
Barry G. Wahlig; QUANTUM TECHNOLOGY INC MARIETTA GA
|
 | The objective of this contract was to conduct research leading to the development of a real-time, hand-held, integrating dosimeter for the measurement of ionizing radiation doses to the crews of high-altitude aircraft and space flights. The specific method chosen was the use of a cadmium telluride detector with appropriate circuitry and computer processing to determine the total energy deposited in the detector. The raw spectra from energy deposited in the ... |
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| A Rodent Water Dispensing System for Use in Hypobaric Chambers |
04 SEP 86 |
|
| Authors:
James A. Devine; Allen Cymerman; ARMY RESEARCH INST OF ENVIRONMENTAL MEDICINE NATICK MA
|
 | A water dispensing system for rodents has been developed for use in chronic research studies involving hypobaric chambers. The system removes an existing problem that has restricted long-term animal exposures due to limitations inherent in the typical water supply bottles. It consists of an external reservoir, connected to water feeding valves located inside the altitude simulation facility. The water dispensing system for rodents provides the potential for a no-loss infinite ... |
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| Cardiopulmonary Effects of Stressful Exercise at Altitude (4,000 FT) of Individuals with Sickle Cell Trait (HbAS or SCT) |
SEP 86 |
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| Authors:
Idelle M. Weisman; R. J. Zeballos; WILLIAM BEAUMONT ARMY MEDICAL CENTER EL PASO TX
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| Controversy persists regarding the risks assumed by individuals with SCT while engaged in activities that would involve a greater likelihood of exposure to hypoxic environments and other stress situations such as performing strenuous exercise especially at altitude. The present study was designed to evaluate the role of a hypoxic stimulus (simulated altitude of 2300m) on the interactions of Hemoglobin S (%HbS), sickling (%S), and acute strenuous physical exertion in SCT ... |
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| Airspeed Sensing Pressure Valve System. |
05 AUG 1986 |
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| Authors:
Peter Ayoub; DEPARTMENT OF THE NAVY WASHINGTON DC
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| A dual redundant pitot-static sensing system for use in system for deploying a parachute during ejection of an occupant from a disabled aircraft includes a pair of pressure-sensitive check valves to store peak dynamic airstream pressure for obviating difficulties experienced when the pitots are blocked by airborne debris. |
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| Effects of Aviation Altitudes on Soft Contact Lens Wear |
AUG 86 |
|
| Authors:
William J. Flynn; Robert E. Miller Ii; Thomas J. Tredici; Michael G. Block; SCHOOL OF AEROSPACE MEDICINE BROOKS AFB TX
|
| Aviation in the U.S. Air Force can be divided into two categories on the basis of aircraft cabin environments: (1) Fighter-attack-reconnaissance (FAR) aircraft with cabin pressures equivalent to high altitudes, and (2) tanker-transport-bomber (TTB) aircraft with cabin pressures equivalent to lower altitudes, but for longer durations. The purpose of this study was to determine the effects of soft contact lens wear in these two types of aircraft environments. Ten subjects ... |
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| Subcontact Lens Bubble Formation under Low Atmospheric Pressure Conditions |
AUG 86 |
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| Authors:
William J. Flynn; Robert E. Miller Ii; Thomas J. Tredici; Michael G. Block; Edward E. Kirby; SCHOOL OF AEROSPACE MEDICINE BROOKS AFB TX
|
| Concern regarding contact lens wear in aviation has been the fear of subcontact lens bubble formation. Previous reports have documented the occurrence of bubbles with hard PMMA lenses. Reported here are the results of contact lens bubble studies with soft hydrophilic and rigid gas-permeable lenses. Testing was accomplished in simulated aircraft flights in hypobaric chambers and onboard military transport aircraft. Hypobaric chamberflights were of 3 types: high-altitude flights up to ... |
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| Mesoscale Convective Complex versus Non-Mesoscale Convective Complex Thunderstorms: A Comparison of Selected Meteorological Variables |
AUG 86 |
|
| Authors:
Michael E. Hoofard; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH
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| A comparative investigation of mesoscale convective complex (MCC) and non-mesoscale convective complex (non-MCC) prestrom environments is conducted. Eleven atmospheric variables normally associated with thunderstorm formation are either observed or calculated for a total of nine MCC and nine non-MCC storms. These variables include: 850 mb mixing ratio, 850 mb advection of water vapor, 850 mb flux divergence of water vapor, surface to 500 mb average relative humidity, precipitable water, surface ... |
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| Characteristics of Altitude Error at Reduced Quantization |
AUG 86 |
|
| Authors:
Gene A. Wong; FEDERAL AVIATION ADMINISTRATION WASHINGTON DC PROGRAM ENGINEERING AND MAINTENANCE SERVICE
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| This report describes an analysis of the impact of reducing the quantization level on the altitude error produced by the aircraft's altimetry system. Specifically, the mean and the standard deviation of the altitude error at the output of the aircraft's onboard quantization device are derived assuming altitude error at its input is normally distributed. The formulae derived are very general, exact, and applicable to all ranges of input statistics and ... |
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| Spacecraft in the Magnetospheric Environment |
26 JUN 86 |
|
| Authors:
Robert L. Carovillano; BOSTON UNIV MA DEPT OF PHYSICS
|
| This research effort dealt with environmental studies in magnetospheric physics that affect large spacecraft in space. The objectives were in four areas: development of computerized models of magnetospheric particle and field conditions, development of empirical models of precipitating particles distributions at geosynchronous altitude, plasma-beam studies and spacecraft charging, and development of a shuttle code to model electrical potentials and currents under various magnetospheric conditions. Scientific results and accomplishments have been ... |
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| The Estimation of the Earth's Gravity Field |
JUN 86 |
|
| Authors:
Bela Szabo; OHIO STATE UNIV COLUMBUS DEPT OF GEODETIC SCIENCE AND SURVEYING
|
| This report reviews the various methods for the description of the Earth's gravity field from direct and/or indirect observations. Geopotential models produced by various organizations and in use during the past 15 years are discussed in detail. Recent and future programs for the improvement of global gravity fields are reviewed and the expected improvements from new observation and data processing techniques are estimated. The regional and local gravity field is ... |
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| A Comparison of Nonlinear Filters for Orbit Determination and Estimation |
JUN 86 |
112 pages |
| Authors:
Daryl G. Boden; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH
|
| This research compares the performance of three filters which have been applied to the problem of orbit determination using actual satellite tracking data obtained from ground based radars. The states estimated are the osculating classical orbital elements and the satellite ballistic coefficient. The dynamics used to propagate the state vector forward include the two-body acceleration plus perturbations due to atmospheric drag, zonal harmonics in the geopotential through J(2), and tesseral ... |
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| AFGL Atmospheric Constituent Profiles (0.120km) |
15 MAY 86 |
46 pages |
| Authors:
G. P. Anderson; S. A. Clough; F. X. Kneizys; J. H. Chetwynd; E. P. Shettle; AIR FORCE GEOPHYSICS LAB HANSCOM AFB MA
|
| An atmospheric data base consisting of volume mixing ratios (o0 to 12okm) for twenty eight (28) minor and trace gases has been assembled for use with spectral radiance transmittance models. Six references atmospheres, each defining temperature, pressure and density as a function of altitude (selected from the U.S. Standard Supplements, 1966 and the U.S. Standard Atmosphere, 1976) provide a range of climatological choices. Analogous zonal-mean descriptions for 2O, O3, N2O, ... |
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| Altitude Acclimatization Attentuates Plasma Ammonia during Submaximal Exercise |
MAY 86 |
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| Authors:
Particia M. Young; Paul B. Rock; Charles S. Fulco; Laurie A. Trad; Vincent A. Forte Jr; ARMY RESEARCH INST OF ENVIRONMENTAL MEDICINE NATICK MA
|
| This study examined the effects of acclimatization to 4300 m altitude on changes in plasma ammonia concentrations with 30-min submaximal (75% VO2 max) cycle exercise. Human test subjects were divided into a sedentary (n=6) and active group (n=5). Maximal oxygen uptake (VO2 max) was determined at sea level, after acute HA (t24h) and chronic HA (t=13d), exposure to 4300 m altitude. The VO2 max of both groups decreased 32% with ... |
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| Operation Everest II. Altitude Decompression Sickness during Repeated Altitude Exposure |
MAY 86 |
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| Authors:
Mark K. Malconian; Paul B. Rock; James A. Devine; Allen Cymerman; John R. Sutton; ARMY RESEARCH INST OF ENVIRONMENTAL MEDICINE NATICK MA
|
| The incidence of altitude decompression sickness (ADS) was studied in 23 altitude scientists during repeated altitude exposure to 15-20,000 feet in a decompression chamber. Prior to each altitude exposure, a 30-60 minute prebreathing period with 100% oxygen took place. Ascent was made to an altitude at a rate of 2000 feet per minute. The altitudes studied ranged from 15-29,000 feet. Symptoms reported appear consistent with previous reports with regard to ... |
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| Helicopter Hover Performance Estimation Comparison with UH-IH Iroquois Flight Data |
APR 86 |
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| Authors:
M. J. Williams; A. M. Arney; AERONAUTICAL RESEARCH LABS MELBOURNE (AUSTRALIA)
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| The hover performance of the UH-1H Iroquois has been estimated under a variety of operational conditions using POLAR2, a program based on blade element theory. This program is an improved version of POLAR, a program previously developed at ARL, which did not allow for compressibility effects. The occurrence of these effects in a hovering situation is discussed, and a relationship allowing for such effects has been derived and included in ... |
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| An Environmentally-Controlled Extended-Use Small Animal Hypobaric Chamber |
APR 86 |
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| Authors:
James A. Devine; Allen Cymerman; ARMY RESEARCH INST OF ENVIRONMENTAL MEDICINE NATICK MA
|
| An environmentally-controlled extended-use small animal hypobaric chamber has been designed to study small laboratory animals at low barometric pressures for long periods of exposure. The rectangular chamber (91.4 x 71.1 x 50.8 cm) is constructed of aluminum plate and acrylic resin with a volume of 330,000 cc. A computer/data acquisition control unit provides for controlling and collecting data on pressure, temperature, and relative humidity (RH) for sustained operations. Altitude simulation ... |
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| Altitude Acclimatization (Ventilation and Chemoresponsiveness) during Wakefulness and Sleep |
APR 86 |
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| Authors:
David P. White; Kevin Gleeson; Cheryl K. Pickett; John T. Reeves; Anne M. Rannels; ARMY RESEARCH INST OF ENVIRONMENTAL MEDICINE NATICK MA
|
| Although the influence of altitude acclimatization on respiration has been carefully studied, the associated changes in hypoxic and hypercapnic ventilatory responses are the subject of controversy and neither response has been carefully evaluated during sleep at altitude. To answer these questions, six healthy males were studied at sea level and on nights 1, 4, and 7 following arrival at altitude (14,110 ft). During wakefulness ventilation and the ventilatory responses to ... |
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| USAF Test Pilot School. Flying Qualities Textbook. Volume 2. Part 2 |
APR 86 |
931 pages |
| Authors:
AIR FORCE TEST PILOT SCHOOL EDWARDS AFB CA
|
| Divergence experienced during rolling maneuvers has frequently been referred to as inertial coupling. This leads to a misconception of the problems involved. The divergence experienced during rolling maneuvers is complex because it involves not only inertial properties, but aerodynamic ones as well. The material in this chapter is intended to offer a physical explanation of the more important causes of roll coupling. Coupling results when a disturbance about one aircraft ... |
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| Terrain-Modeling Methodology for Aircraft Encounters with Surface-to-Air Missiles |
MAR 86 |
|
| Authors:
James R. Hamilton; Ronald G. Johnson; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING
|
| A method was developed to characterize entire terrain types in terms of their impact on the encounter between aircraft and surface-to-air missile (SAM) systems. Two contrasting types of terrain analyzed: the moderately rugged terrain around Fulda, West Germany, and the North German Plain. Digitized terrain elevation data (DTED), developed by the Defense Mapping Agency, served as raw data. Twenty suitable SAM sites were sampled from each terrain areas. Four layers ... |
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| A Diagnostic Investigation of Explosive Maritime Cyclogenesis during FGGE |
MAR 86 |
|
| Authors:
Darrell H. Smith; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| A collection of explosive and non-explosive storm groups are selected from the western North Atlantic Ocean and western North Pacific Ocean. Explosive cyclogenesis is defined as having a mean sea level pressure fall of 1 mb h for 24 h. Using ECMWF(European Center for Medium Range Forecasts) analyses with FGGE SOP-1 data, the storm environment properties of both storm types are analyzed and compared. Storm environment properties include static stability, ... |
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| Modeling Aircraft Attrition in the Air Defense Environment |
MAR 86 |
|
| Authors:
George D. Panagakos; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| This thesis presents a high resolution, computer simulation model of aircraft attrition in the air defense environment. The model employs extensive pre-processing submodels and programs in order to efficiently examine tactical scenarios and reduce program execution time. The pre-processing outputs are loaded into a dynamic simulation submodel to analyze the aircraft/air defense engagement sequence. The overall simulation model is modular and can be easily modified to satisfy the user's particular ... |
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| The Whole Sky Sensor |
26 FEB 86 |
64 pages |
| Authors:
James K. Rocks; MICRO SCIENCE INC LEESBURG VA
|
| The height and velocity of visible clouds and percent cover at several altitudes over a portion (28 degree cone) of the sky can been determined from the ground by means of triangulation with an instrument consisting of a pair of CID cameras and a computer. A system has been built which is stand- alone, automatic and produces reports every ten minutes. Results are repeatable and accuracy as determined by indirect ... |
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| The Estimation of Geopotentials by Way of Geophysical Inverse Theory |
27 JAN 86 |
|
| Authors:
Mark T. Lane; Edward M. Gaposchkin; MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB
|
| Satellite to satellite tracking data (SST) can be used to measure the geopotential at the satellite altitude. This measurement can be used to estimate the Earth's gravity field at the Earth's surface, the so-called 'inverse problem'. Geophysical inverse theory is applied to this inverse problem, and numerical methods are developed and tested. Geophysical inverse theory is used to map the geopotential from the satellite altitude to a lower surface. Two ... |
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| Climatic Atlas of Icing Potential Over North America |
JAN 86 |
|
| Authors:
AIR FORCE ENVIRONMENTAL TECHNICAL APPLICATIONS CENTER SCOTT AFB IL
|
| A climatic atlas of charts that show percent frequency of occurrence of potential icing conditions over North America. Since icing reports are sparse, an accurate icing climatology is difficult to obtain. A climatology of elements for potential icing conditions, however (such as liquid water content and temperature), can be derived. The Smith-Feddes Liquid Water Content (LWC) computer model uses combined data from the Air Force Global Weather Central Three-Dimensional Nephanalysis ... |
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| Infrared Airglow Clutter |
JAN 86 |
|
| Authors:
J. Ulwick; K. Baker; A. J. Steed; UTAH STATE UNIV LOGAN SPACE DYNAMICS LABS
|
| A rocket and ground-based measurement programs was conducted to investigate infrared airglow and atomic oxygen density as part of the international MAP/WINE campaign in northern Scandinavia. The mean OH Meinel rotational temperature was approximately 199 K during a stratospheric warning event measured by a ground-based interferometer at ESRANGE in Sweden. This temperature is approximately 30 to 40 degress cooler than measurements taken when no stratospheric events were taking place and ... |
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| An Economic Feasibility Study on the Space-Based Production of Methane Gas from Human Waste through Aerobic Digestion for Use as an Orbit Maintenance Propellant |
DEC 85 |
|
| Authors:
Coral C. Fallstead; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING
|
| This project explores the economic feasibility of creating fuel energy in space from human waste with application toward space station orbit maintenance. The energy generating concept proposed in this study is anaerobic digestion. This process has four benefits for space application; 1) it can stabilize human waste products, 2) it can reduce solid wastes, 3) it can provide a fairly clear effluent for water recovery, and 4) it can provide ... |
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| An Assessment of Data Quality and Quantity from Airborne Cloud Physics Projects from 1974 through 1984 |
DEC 85 |
|
| Authors:
Richard K. Jeck; NAVAL RESEARCH LAB WASHINGTON DC
|
| Most of the principal airborne cloud physics projects over the past decade are reviewed here to assess the quantity, quality, and availability of microphysical data from clouds above the freezing level. In particular, available information from the projects is analyzed to determine whether adequate data on supercooled liquid water content (SLWC) and snow currently exist for reliably characterizing aircraft icing conditions at altitudes up to 30,000 feet (9 km) over ... |
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| Vectored Thrust Digital Flight Control for Crew Escape. Volume 2 |
DEC 85 |
|
| Authors:
James V. Carroll; Robert F. Gendron; SCIENTIFIC SYSTEMS INC CAMBRIDGE MA
|
| Work of Meyer and Cicolani was adapted for application to open seat escape systems in current Air Force fighter aircraft. The control system design is a fully self-contained system whose major on-seat components are: acceleration, rate, attitude and altitude sensors, real-time control logic imbedded on a microprocessor chip, rocket thrusters with thrust vectoring and throttling capability, and various avionics and support subsystem hardware items (e.g., power supply). The control concept ... |
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| Long-Term Effects of Environment on Health and Performance of Antarctic Winter-Over Personnel |
DEC 85 |
14 pages |
| Authors:
Lawrence A. Palinkas; NAVAL HEALTH RESEARCH CENTER SAN DIEGO CA
|
| The object of this study was to determine if the risk to health and well-being of personnel who winter-over in Antarctica is related to the station to which they are assigned. Subjects were 327 enlisted Navy personnel who wintered over between 1963 and 1974. A fifteen-year period from 1965 to 1979 was established for follow-up. Demographic characteristics, total first hospitalizations for unique diagnoses, and performance indicators were examined. Comparisons of ... |
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| Evaluation of Surface Craft and Ice Target Detection Performance by the AN/APS-135 Side-Looking Airborne Radar (SLAR) |
DEC 85 |
78 pages |
| Authors:
R. Q. Robe; N. C. Edwards Jr.; D. L. Murphy; N. Thayer; G. L. Hover; ANALYSIS AND TECHNOLOGY INC NORTH STONINGTON CT
|
| During the Spring of 1985, the U.S. Coast Guard R&D Center conducted an open-ocean evaluation of the AN/APS-135 SLAR in cooperation with the International Ice Patrol (IIP). Data were collected to determine the system's ability to detect various surface craft (ranging from a 4-person life raft to a 55-meter ship) and ice targets. The effects on detection performance of target size, range, search altitude, and sea state were evaluated using ... |
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| Pyridostigmine Bromide: A Pre-Exposure Antidote for Specific Chemical Warfare Nerve Agents: A Condensed Review for the Aeromedical Specialist |
DEC 85 |
|
| Authors:
James E. Whinnery; SCHOOL OF AEROSPACE MEDICINE BROOKS AFB TX
|
| Pyridostigmine bromide--an acetylcholinesterase inhibitor which is being considered for use as a pre-exposure antidote for prevention of the undesirable effects of specific chemical warfare nerve agents--has several physiologic effects on the body when taken systemically. This research has been limited to the pharmacologic-physiologic effects which pose distinct theoretical problems to the aviation community. Hopefully, this publication will facilitate rapid acquisition of the pertinent facts related to pyridostigmine bromide, so that ... |
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| IRIG Standards for Range Meteorological Data Reduction. Part 2. Rocketsonde |
DEC 85 |
|
| Authors:
RANGE COMMANDERS COUNCIL WHITE SANDS MISSILE RANGE NM INTER- RANGE INSTRUMENTATION GROUP
|
| The Rocket Reduction Program is designed to process data acquired by standard Loki and Super Loki rocketsondes. This program accepts input data taken from the AN/TMQ-5 record and the strip chart from the MSS Tracking System, a radar and/or AN/GMD-4 Rawin Set, plus co-rawinsonde baseline data. The program processes input data and output as its final product rocketronde data in readily usable tabular format; card decks, if desired; and rocketsonde ... |
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| Airborne Lightning RF Direction Finding: A Feasibility Study |
NOV 85 |
|
| Authors:
Craig O. Hayenga; NEW MEXICO INST OF MINING AND TECHNOLOGY SOCORRO
|
| The feasibility of using the RF radiation from lightning, specifically in the VHF range, for locating and avoiding lightning from an aircraft platform is examined from three perspectives. The phenomenological considerations explore the unique characteristics of the VHF radiation from lightning together with arguments for its use in an airborne detection system. The propagation considerations point out the relevant factors which must be considered for VHF radio propagation when both ... |
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| Altitude Ignition/Lean Decel Study |
NOV 85 |
|
| Authors:
Dean Andreadis; PRATT AND WHITNEY WEST PALM BEACH FL GOVERNMENT PRODUCTS DIV
|
| The objective of this study was to develop analytical tasks consisting of new or improved models for predicting altitude ignition and lean deceleration blowout. The approach taken was to describe the ignition and flame stabilization limits in terms of characteristic 'time' models. Characteristic times associated with chemi |
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| Optical and Event-Duration Variables Affecting Self-Motion Perception |
NOV 85 |
|
| Authors:
Dean H. Owen; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
|
| This paper includes four experiment sections. The first pair of experiments investigated the usefulness of optical flow acceleration in detecting descent. When sink rate and ground speed are constant, optical flow accelerates. Holding fractional loss in altitude constant throughout a descent event also holds flow rate invariant, eliminating flow acceleration as a potential source of information. Detection of descent was accomplished easily without flow acceleration, and it was found that ... |
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| Asymmetric Thrust Warning System for Dual Engine Aircraft. |
08 OCT 1985 |
|
| Authors:
William W. Stockton; DEPARTMENT OF THE AIR FORCE WASHINGTON DC
|
| This discloses an asymmetric thrust warning system for an aircraft having two gas turbine engines. The compressor discharge pressures of the two engines are compared to determine the engine providing the lower thrust and to provide a signal indicative of the actual difference in thrust. If the difference in thrust exceeds a prescribed value related to aircraft altitude, a low thrust warning lamp is illuminated. In addition, the positions of ... |
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| Model Vertical Profiles of Extreme Rainfall Rate, Liquid Water Content, and Drop-Size Distribution |
06 SEP 85 |
43 pages |
| Authors:
Paul Tattelman; Paul T. Willis; AIR FORCE GEOPHYSICS LAB HANSCOM AFB MA
|
| This report provides a new model of hydrometeors and associated cloud-water content from the surface to 20 km. The model profiles at altitude were developed based on five surface rainfall rates: 36, 84, 168, 432, and 1872 mm/hr. The first three rates correspond to a frequency of occurrence of 0.5 percent, 0.1 percent, and 0.01 percent of the time during the worst month in the most severe area of the ... |
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| Flight Training Simulators. Effects of Terrain Accuracy on Simulated Radar Image Quality |
SEP 85 |
18 pages |
| Authors:
P. M. Crane; AIR FORCE HUMAN RESOURCES LAB BROOKS AFB TX
|
| This experiment evaluated the effect of terrain vertical accuracy on the quality and perceived training effectiveness of simulated radar images. Seven Air Force navigators judged the quallity and training value of digital radar landmass imagery produced at six different levels of terrain vertical accuracy. Each image represented the simulated ground mapping radar image of a mountainous area viewed from an altitude of 10,000 feet. The results indicated that (a) increasing ... |
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| Nitric Oxide and Nitrogen Dioxide Content of Whole Air Samples Obtained at Altitudes from 12 to 30 km |
20 AUG 85 |
|
| Authors:
C. C. Gallagher; C. A. Forsberg; R. V. Pieri; G. A. Faucher; J. M. Calo; AIR FORCE GEOPHYSICS LAB HANSCOM AFB MA
|
| Whole air samples were obtained in the stratosphere using a liquid helium-cooled cryosampler mounted on a balloon platform. Approximately 1 g mol of sample was obtained at each of three altitudes per balloon flight and was maintained at 4 K until desorption just prior to analysis. Samples were obtained at six altitudes ranging from 12 to 30 km and at five latitudes from 9 deg to 64 deg N. Nitric ... |
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| I/EW Sensor Error Budget for DF Fix Estimations |
14 AUG 85 |
|
| Authors:
Robert Gardner; JET PROPULSION LAB PASADENA CA
|
| The purpose of this document is to identify all of the various error components, in the most general case, when determining lines of bearings. These lines of bearing are used in subsequent fix estimations for emitters. The essential assumptions of this document are: the emitter is not moving at the time the line of bearing is measured; the sensor may be in any position, from earth bound to a moving ... |
|
| Flight Operations Noise Tests of Eight Helicopters |
AUG 85 |
697 pages |
| Authors:
S. A. Yoshikami; FEDERAL AVIATION ADMINISTRATION WASHINGTON DC OFFICE OF ENVIRONMENT AND ENERGY
|
| This document presents acoustical data and flight path information acquired during the FAA/HAI Helicopter Flight Operations Noise Test Program. 'As-measured' noise levels of the Aerospatiale 365N, Agusta 109A, Bell 206L-1 and 222A, Hughes 500D, MBB BK117, Robinson R22, and Sikorsky S76 are presented for various enroute and heliport flight operations. Thse operations include level flyovers at two altitudes, normal takeoffs, normal and constant-gildeslope approaches, various types of noise abatement approaches, ... |
|
| Method to Detect Ethylene Glycol in Gaseous Mixtures |
AUG 85 |
|
| Authors:
R. E. Willis; ARNOLD ENGINEERING DEVELOPMENT CENTER ARNOLD AFS TN
|
| Ethylene glycol is used as a refrigerant for the intake air during simulated altitude testing. There have been some problems during these test because of the ethylene glycol accidentally leaking into the inlet airstream. Since ethylene glycol has at times been suspected of interfering with the test article, its early detection would be greatly beneficial so that testing could be stopped before damage occurs. Because a detection scheme must indicate ... |
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| Pilot-Oriented Performance Measurement |
AUG 85 |
|
| Authors:
J. De Maio; H. H. Bell; J. Brunderman; AIR FORCE HUMAN RESOURCES LAB BROOKS AFB TX
|
| Aircrew performance measurement is a critical problem in evaluating the quality of a visual simulation system and in determining the effectiveness of aircrew training devices. An effective performance measurement system must be able to separate performance into appropriate components and describe the relationship of these components. This paper describes a performance measurement system developed to analyze pilot performance in maintaining altitude in both straight and turning flight as a function ... |
|
| Deployment Sequence Mode Selection System for Aircraft Ejection Seat. |
09 JUL 1985 |
|
| Authors:
Peter Ayoub; Alan Cantor; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| An electronic system for selecting the proper mode sequence for deploying a recovery parachute from an aircraft ejection seat. The system senses altitude, airspeed, and sink rate; and compares these to predetermined reference signals. The system also incorporates logic circuits and time delay circuits. The logic circuits are arranged to select one of four time delays depending on the status of the various parameters relative to the reference signals. (Patents) ... |
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| Pitch Rate Versus G Command as the Longitudinal Flight Control System Design Strategy for a Statistically Unstable Fighter Type Aircraft with Two Control Surfaces |
02 JUL 85 |
|
| Authors:
T. P. Webb; AIR FORCE ACADEMY CO
|
| Pitch rate command and normal G command longitudinal flight control systems were designed using linear optimal control theory for a statically unstable, two control surface, fighter-type aircraft at both a power approach and an up-and-away flight condition. The closed-loop systems were then evaluated in man-in-the-loop simulations with pilots attempting random altitude tracking and pitch tracking tasks. The evaluation results indicated that in the power approach flight condition, normal G command ... |
|
| Probability and Conditional Probability of Cumulative Cloud Cover for Selected Stations Worldwide |
JUL 85 |
|
| Authors:
William O. Gallery; John R. Hummel; David A. Farmer; OPTIMETRICS INC BEDFORD MA
|
| Cloud cover has a major impact on both visible and infrared electro- optical sensors. Climatological statistics of the probability of cloud cover would be useful to tactical commanders planning missions over hostile or contested territory where observations are unavailable. This report presents tables of the historical probability, by okta, of cumulative cloud cover at or below 15 given altitudes. The data consist of routine surface weather observations from the ETAC ... |
|
| Night Vision Goggle Head-Up Display for Fixed-Wing and Rotary-Wing Special Operations |
JUN 85 |
155 pages |
| Authors:
John C. Simons; Sheldon Unger; Jeffrey L. Craig; SYSTEMS RESEARCH LABS INC DAYTON OH
|
| This report describes the development and evaluation of night vision goggles (NVGs) modified with head-up display (HUD) symbols for flying night, visual flight rule (VFR), low level operations. The NVG/HUD combines NVG compatible symbols on a monocular presentation with a binocular view of an infrared scene. The Harry G. Armstrong Aerospace Medical Research Laboratory (AAMRL) sponsored the development program for special Military Airlift Command (MAC) operations using fixed- and rotary-wing ... |
|
| The Turbulent Gravity Wave-Critical Level Encounter in the Evolution of Atmospheric Flow |
JUN 85 |
|
| Authors:
John R. Grant; GOULD DEFENSE SYSTEMS INC MIDDLETOWN RI OCEAN DEFENSE DIV
|
| The extended objective of this work is to contribute to understanding the short term response of the atmosphere to short term influences. The particular influence studied is internal gravity wave motion, specifically the encounter of a gravity wave with a critical level, a height where the component of the wind speed in the direction of the horizontal phase propagation matches the horizontal component of wave phase speed. Two major effects ... |
|
| A Computer Program to Model the CN2 Optical Turbulence Characteristics of a Given Atmosphere, Its Conversion to IBM Fortran and Utilization |
JUN 85 |
|
| Authors:
N. J. Padula; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| This thesis describes the conversion of a computer program form Fortran IV used by the CDC computer to Fortran IV compatible with the Naval Postgraduate School IBM 3033 system. The converted program, called TURB2, estimates the magnitude of the refractive index structure parameter, sq Cn(z), for a dry atmosphere in horizontal layers. The altitudes of the layers depend upon the corresponding altitudes of conventional meteorological rawinsonde balloon data. The data ... |
|
| T-33 (Silver Star MK 3) Pitot-Static System Calibration |
JUN 85 |
34 pages |
| Authors:
T. R. Woodford; E. P. Hansen; AIR FORCE FLIGHT TEST CENTER EDWARDS AFB CA
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| This report presents the results of pitot-static system calibration tests performed on T-33 (Silver Star MK 3), civil registration number N83TB. The T-33 pitot-static system was calibrated in order to use the T-33 as a pacer for the T-46A pitot-static system calibration tests to be performed during the T-46A Development Test and Evaluation Program. Although the test aircraft will perform satisfactorily as a pacer, periodic checks on the pitot-static system's ... |
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