| A Community Terrain-Following Ocean Modeling System (ROMS/TOMS) |
30 Sep 2011 |
13 pages |
| Authors:
Herman G Arango; RUTGERS - THE STATE UNIV NEW BRUNSWICK NJ INST OF MARINE AND COASTAL SCIENCE
|
 | The long-term technical goal is to design, develop and test the next generation, primitive equation ocean model for high-resolution scientific (ROMS: Regional Ocean Modeling System) and operational (TOMS: Terrain-following Ocean Modeling System) applications. This project will improve the ocean modeling capabilities of the U.S. Navy for relocatable, coastal, coupled atmosphere-ocean forecasting applications. It will also benefit the ocean modeling community at large by providing the current state-of-the-art knowledge in physics, ... |
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| Understanding Predictability of the Ocean |
30 Sep 2011 |
12 pages |
| Authors:
Brian Powell; HAWAII UNIV HONOLULU (MANOA CAMPUS) DEPT OF OCEANOGRAPHY
|
| The long-term scientific goals of this research are as follows: (1) to develop an understanding of how some observations affect ocean predictability, (2) to further develop the state-of-the-art ROMS 4D-Var by extending the observational types and applications, (3) to gain experience and develop ideas regarding limitations to the predictability of oceanic processes, and (4) to train a new generation of students in data assimilation and ROMS. The primary objectives of ... |
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| Collaborative Proposal to Extend ONR YIP Research with BRC Efforts |
30 Sep 2011 |
6 pages |
| Authors:
Brian Powell; HAWAII UNIV HONOLULU (MANOA CAMPUS) DEPT OF OCEANOGRAPHY
|
| The long-term scientific goals of this research project are as follows: (1) to develop an understanding of how some sources of error affect ocean predictability, and (2) to develop ideas for overcoming limitations to the predictability of oceanic processes. The primary objectives of this project are to understand the importance of model uncertainty, assess the influence of uncertainty on predictability, and collaborate and learn from fellow BRC projects. The ocean ... |
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| Biologically Inspired Strategies, Algorithms and Hardware for Visual Guidance of Autonomous Helicopters |
02 MAY 2011 |
29 pages |
| Authors:
Mandyam V. Srinivasan; Michael Ibbotson; AUSTRALIAN NATIONAL UNIV CANBERRA
|
| This project has designed, developed and field-tested biologically inspired strategies, algorithms and hardware for vision-based guidance of aircraft for the performance of a variety of tasks, listed below. i) Control of aircraft altitude and attitude, and terrain following are achieved by using a novel principle of `virtual optic flow' to monitor and regulate the height and the orientation of the aircraft relative to the ground. ii) Obstacle detection and avoidance ... |
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| Development of Intelligent Unmanned Systems |
May 2011 |
34 pages |
| Authors:
Carl D Crane; David G Armstrong; FLORIDA UNIV GAINESVILLE CENTER FOR INTELLIGENT MACHINES AND ROBOTICS
|
| This final report describes the technologies designed and developed by the University of Florida (UF) in support of the Air Force Research Laboratory (AFRL). An off road vehicle (Fig. 1) and a hybrid Toyota Highlander (Fig. 2) have been automated and instrumented with pose estimation (GPS and inertial) and object detection (ranging (LADAR), vision and light detection) sensors. The control architecture consists of four primary elements, i.e. Planning Element, Perception ... |
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| A Multi-Scale Model of the Turkish Straits System |
Jan 2010 |
2 pages |
| Authors:
Cheryl A Blain; Mustafa K Cambazoglu; Ewa Jarosz; NAVAL RESEARCH LAB STENNIS DETACHMENT STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
|
| Two narrow, shallow straits, the Dardanelles and the Bosphorus, form a physical connection between the Marmara Sea and its adjacent water bodies, the Aegean Sea to the southwest and the Black Sea to the northeast. This collection of seas and straits is known as the Turkish Straits System (TSS). Saline, dense water from the Aegean flows in a deep, lower layer through the Marmara Sea to the Black Sea while ... |
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| U. S. GODAE: Global Ocean Prediction with the HYbrid Coordinate Ocean Model |
Jan-2009 |
16 pages |
| Authors:
Harley E Hurlburt; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS
|
| Develop a next generation eddy-resolving, fully global ocean prediction system using HYCOM with 1/12 equatorial resolution. (2) Transition this system to NAVOCEANO for operational use in 2008 with assimilation of sea surface height (SSH) from satellite altimeters, sea surface temperature (SST) and temperature (T)/salinity (S) profiles and the ability to perform skillful 30-day forecasts. (3) Include two-way coupling to an ice model. (4) Ensure that an accurate and generalized ocean ... |
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| Global Ocean Prediction Using HYCOM |
JUL 2007 |
6 pages |
| Authors:
Alan J. Wallcraft; Eric P. Chassignet; James A. Cummings; Harley E. Hurlburt; E. J. Metzger; Ole M. Smedstad; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
|
| In the third year of this project, fully-global eddy-resolving simulations have been performed using the HYCOM at 1/12-deg resolution. HYCOM is isopycnal in the open, stratified ocean, but makes a dynamically smooth transition to a terrain-following coordinate in shallow water and to pressure coordinates in the mixed layer and/or unstratified regions via the layered continuity equation. This approach incorporates the disadvantages of these three distinct vertical coordinate types into one ... |
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| Development of the Combat Talon I - APQ-122 Terrain Following Radar (TFR) Antenna Container |
MAR 2006 |
44 pages |
| Authors:
Matthew P. Bozzuto; Susan J. Evans; AIR FORCE PACKAGING TECHNOLOGY AND ENGINEERING FACILITY WRIGHT-PATTERSON AFB OH
|
| The Air Force Packaging Technology Engineering Facility (AFPTEF) was tasked with the design of a new shipping and storage container for the Combat Talon I - TFR Antenna in May of 2005. The new container is designed to replace the fiberglass container that was previously used. The main problems with the fiberglass design were corrosion due to inadequate environmental control and protection, isolation system breakdown, and that there was no ... |
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| Generalized Vertical Coordinates for Eddy-Resolving Global and Coastal Ocean Forecasts |
MAR 2006 |
13 pages |
| Authors:
Eric P. Chassignet; Harley E. Hurlburt; Ole M. Smedstad; George R. Halliwell; Alan J. Wallcraft; E. J. Metzger; Brian O. Blanton; Carlos Lozano; Desiraju B. Rao; Patrick J. Hogan; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
|
| Numerical modeling studies over the past several decades have demonstrated progress both in model architecture and in the use of rapidly advancing computational resources. Perhaps the most notable aspect of this progression has been the evolution from simulations on coarse-resolution horizontal and vertical grids that outline basins of simplified geometry and bathymetry and that are forced by idealized surface fluxes, to fine-resolution simulations that incorporate realistic coastline definition and bottom ... |
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| Formulation, Implementation and Examination of Vertical Coordinate Choices in the Global Navy Coastal Ocean Model (NCOM) |
2006 |
31 pages |
| Authors:
Charlie N. Barron; A. B. Kara; Paul J. Martin; Robert C. Rhodes; Lucy F. Smedstad; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
|
| A 1/8 degrees global version of the Navy Coastal Ocean Model (NCOM) is described with details of its formulation, implementation, and configuration of the vertical coordinate. NCOM is a baroclinic, hydrostatic, Boussinesq, free-surface ocean model that allows its vertical coordinate to consist of sigma coordinates for the upper layers and z-levels below a user-specified depth. This flexibility allows implementation of a hybrid sigma-z coordinate system that is expected to mitigate ... |
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| An Exploratory Analysis of Village Search Operations |
JUN 2004 |
110 pages |
| Authors:
Mehmet Aydin; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Following the cold war a new kind of threat emerged; terrorism became the most important threat used by individuals, organizations, and countries to reach their goals. Turkey has suffered from terrorism for years. In Turkey, the main logistic resources for the terrorist are the villages located in remote areas. A search operation is one of the techniques used to capture these terrorists. In this study, five village search operation scenarios ... |
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| Prediction of Instantaneous Currents in San Diego Bay for Naval Applications |
JUN 2004 |
72 pages |
| Authors:
Albert E. Armstrong; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Naval operations are highly dependent upon environmental conditions that can either adversely affect successful completion or hinder the safety of personnel. Each warfare community has defined environmental thresholds and operating limits that restrict the execution of any intended maneuver. As the warfare environment continues to shift from open ocean to the littoral, environmental prediction and modeling efforts of shallow water surroundings need to be developed to support these operations. A ... |
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| A Terrain-Following Crystal Grid Finite Volume Ocean Circulation Model |
2004 |
26 pages |
| Authors:
Peter C. Chu; Chenwu Fan; NAVAL POSTGRADUATE SCHOOL MONTEREY CA NAVAL OCEAN ANALYSIS AND PREDICTION LAB
|
| A three-dimensional hydrostatic finite volume ocean model is developed solving the integral dynamical equations. Since the basic (integral) equations are solved for finite volumes rather than grid points, the flux conservation is easily enforced even on arbitrary meshes. Both upwind and high-order combine compact schemes can be incorporated into the model to increase computational stability and accuracy. For abrupt topography, a terrain-following grid discretization is designed to reduce computational errors ... |
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| Investigation of Doppler Effects on the Detection of Polyphase Coded Radar Waveforms |
FEB 2003 |
87 pages |
| Authors:
Geoffrey G. Bowman; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Special operations missions often depend on discrete insertion of highly trained soldiers into dangerous territory. To reduce the risk involved in this type of engagement, Low Probability of Detection radar waveforms have been designed specifically to defeat enemy passive radar detectors, These waveforms have been shown to perform well when the Doppler shift is minimal, but their performance degrades dramatically with increased frequency shifts due to Doppler effects. This research ... |
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| Hydrostatic Correction for Sigma Coordinate Ocean Models |
2003 |
13 pages |
| Authors:
Peter C. Chu; Chenwu Fan; NAVAL POSTGRADUATE SCHOOL MONTEREY CA NAVAL OCEAN ANALYSIS AND PREDICTION LAB
|
| How to reduce the horizontal pressure gradient error is a key issue in terrain-following coastal models. The horizontal pressure gradient splits into two parts, and incomplete cancellation of the truncation errors of those parts cause the error. Use of the finite volume discretization leads to a conserved scheme for pressure gradient computation that has better truncation properties with high accuracy. The analytical coastal topography and seamount test cases are used ... |
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| Basin-Scale Ocean Prediction with the Hybrid Coordinate Ocean Model |
2003 |
8 pages |
| Authors:
E. J. Metzger; Patrick J. Hogan; Ole M. Smedstad; E. Chassignet; Harley E. Hurlburt; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
|
| Eddy-resolving simulations of the Atlantic and Pacific Oceans were performed using the HYbrid Coordinate Ocean Model (HYCOM at 1/120 (-1 km mid- latitude) resolution. HYCOM is isopycnal in the open, straqfied ocean, but makes a dynamically smooth transition to a terrain-following coordinate in shallow water and to pressure coordinates in the mixed layer and/or unstratified regions via the layered continuity equation. This approach retains the advantages that each individual vertical ... |
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| Terrain Level of Detail in First Person-Ground Perspective Simulations |
MAR 2002 |
75 pages |
| Authors:
Victor L. Spears III; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| The Army Game Project at the Naval Postgraduate School is utilizing Epic's Unreal game engine to create a realistic first person infantry simulation. The project involves both indoor and outdoor spaces, including terrain datasets larger than normally supported by the Epic engine. While there bas been extensive research relating to terrain rendering algorithms, they are unsuitable for this system due to hardware requirements, task limitation, or inefficient memory management. These ... |
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| Crew Integration & Automation Testbed and Robotic Follower Programs |
30 MAY 2001 |
12 pages |
| Authors:
Bruce Brendle; ARMY TANK-AUTOMOTIVE RESEARCH AND DEVELOPMENT CENTER WARREN MI VETRONICS TECHNOLOGY AREA
|
| The viewgraphs for the crew integration and automation testbed and robotic follower programs are presented. |
|
| Cloud Scene Simulation Model (CSSM) |
AUG 2000 |
26 pages |
| Authors:
Susan A. Triantafillou; NORTHEAST CONSORTIUM FOR ENGINEERING EDUCATION PORT ROYAL VA
|
| The majority of the effort focused on fine tuning the Cloud Scene Simulation Model(CSSM). Support was also provided for the National Polar Orbiting Operational Environmental Satellite System (NPOESS) by determining NPOESS Environmental Data Records accuracy requirements. |
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| The Transfer of Spatial Knowledge from Virtual to Natural Environments as a Factor of Map Representation and Exposure Duration |
SEP 1999 |
260 pages |
| Authors:
Quay B. Jones; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Terrain navigation is a critical skill in the military. Virtual environments (VEs) have been suggested as a possible tool in training spatial knowledge. However, little research has been conducted into the ability of VEs to impart spatial knowledge of a real world area. This thesis research addresses the utility of VEs to impart spatial knowledge of a natural terrain area compared to traditional methods. Twenty subjects ... |
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| Digital Map Technology for GPS-Based Navigation and Terrain Avoidance System |
31 JUL 1999 |
94 pages |
| Authors:
Kimberly L. Dubbs; Robert A. Severino; DUBBS AND SEVERINO IRVINE CA
|
| The U.S. Military has a need for a covert (non-emitting) system that will assist the pilot to navigate using terrain following techniques while maintaining maximum safety against terrain impact. This project addresses the software development and system integration of a GPS-Based terrain avoidance system. The system extrapolates the region immediately ahead of the aircraft and alerts the pilot when the current flight vector intercepts the safety ... |
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| Representation, Modeling, and Recognition of Outdoor Scenes |
MAY 1999 |
49 pages |
| Authors:
Martin A. Fischler; Robert C. Bolles; SRI INTERNATIONAL MENLO PARK CA
|
| The goal of this project is to advance the state of the art in scene interpretation for autonomous systems that operate in natural terrain. In particular, techniques are being developed for representing knowledge about complex cultural and natural environments so that a computer vision system can successfully plan, navigate, recognize, and manipulate objects, and answer questions or make decisions relevant to this knowledge. The results to date include the development ... |
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| Battlefield Visualization |
15 DEC 1998 |
121 pages |
| Authors:
William J. Neal; Sidney T. Weinstein; Amy E. Alving; John H. Cafarella; John Cittadino; ARMY SCIENCE BOARD WASHINGTON DC
|
| A study analyzing battlefield visualization (BV) as a component of information dominance and superiority. This study outlines basic requirements for effective BV in terms of terrain data, information systems (synthetic environment; COA development and analysis tools) and BV development management, with a focus on technology insertion strategies. This study also reports on existing BV systems and provides 16 recommendations for Army BV support efforts, including interested organization, funding levels and ... |
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| Spatial Knowledge Acquisition and Transfer from Virtual to Natural Environments for Dismounted Land Navigation |
SEP 1998 |
311 pages |
| Authors:
Simon R. Goerger; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Navigation and terrain familiarity are critical for mission success in the military. Virtual environments (VEs) have often been suggested as a useful tool in addressing these issues. This thesis research addresses the utility of VEs to improve spatial knowledge of and navigation performance through natural terrain compared to traditional methods. In this experiment, fifteen subjects were assigned to one of three training conditions. The map ... |
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| Terrain Display Alternatives: Assessment of Information Density and Alerting Strategies |
APR 1998 |
51 pages |
| Authors:
Melissa Bud; Mary Stearns; Peter Mengert; JOHN A VOLPE NATIONAL TRANSPORTATION SYSTEMS CENTER CAMBRIDGE MA
|
| Current technology makes it possible to display navigation and terrain information on electronic screens in the cockpit. The conventions used for position and terrain information must be clearly presented so pilots can maintain their positional awareness and avoid collision with terrain. There are very few recommendations or guidelines available for the design and evaluation of electronic displays. The Volpe National Transportation Systems Center (Volpe ... |
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| Data Assimilation and Model Evaluation Experiment: North Atlantic Basin |
Jan 1998 |
6 pages |
| Authors:
Scott Glenn; Dale B Haidvogel; Mohamed Iskandarani; Paola Malanotte-Rizzoli; RUTGERS - THE STATE UNIV NEW BRUNSWICK NJ INST OF MARINE AND COASTAL SCIENCE
|
| Our long-term goal has been the realization of an improved mesoscale prediction capability in the North Atlantic Basin through the development of advanced prognostic modeling systems, the preparation of remotely acquired and in situ datasets, and their joint use for validation and data assimilation studies. We seek to build and apply more accurate and efficient models of the basin-scale ocean circulation, including the adjacent continental shelves and marginal seas. Modeling ... |
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| Virtual Environments and Wayfinding in the Natural Environment |
SEP 1997 |
127 pages |
| Authors:
William P. Banker; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| The purpose of this study was to determine if a Virtual Environment (VE) model of a natural environment could provide familiarity training transfer. The methods used included aspects from sport orienteering. 15 male participants comprising three ability groups participated within three treatment groups. The treatment groups were comprised of a map study, map and VE study, and an actual environment study. The results indicated that navigational ... |
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| Evaluation of the Modular Semi-Automated Force Air Entity Simulation |
SEP 1996 |
25 pages |
| Authors:
Michael T. Conquest; David J. Lerman; Herbert H. Bell; HUGHES TRAINING INC MESA AZ TRAINING OPERATIONS DIV
|
| This report describes the Modular Semi-Automated Force (ModSAF) system's capability to provide realistic computer-generated aircraft for use in Advanced Distributed Simulation exercises. This evaluation looked at selected flight performance and mission behavior as well as aerodynamic and flight dynamic exercises. Results indicate that ModSAF provides only a rudimentary capability to realistically depict modern fighter aircraft. Although the ModSAF software architecture is sound and well-organized, incorrect modeling of aircraft and mission ... |
|
| Integrated Logistics Support in Special Operations Aviation. A Case Study of the MH-60K and MH-47E |
JUN 96 |
189 pages |
| Authors:
Scott A. Jacobsen; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| This thesis identifies the major factors faced by the Program Manager in developing and implementing the integrated logistics support plan (ILSP) for the U.S. Army's Special Operations Aircraft (SOA), the MH-60K and MH-47E. The SOA Program had many unique characteristics which made it a prime candidate for identification of major factors and development of lessons learned. Two of those unique characteristics are the facts that it was designated a nondevelopmental ... |
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| The Integration of the PSU/NCAR Mesoscale Model (MM5) with the Phillips Laboratory Cloud Scene Simulation Model (CSSM) |
30 APR 96 |
21 pages |
| Authors:
A. A. Setayesh; RADEX INC BEDFORD MA
|
| An interface program has been developed to convert interpolated data from PSU/NCAR Mesoscale Model (MMS) to a set of appropriate input data in Navy Operational Regional Atmospheric Prediction System (NORAPS) format to be used in the Phillips Laboratory Cloud Scene Simulation Model (CSSM). The CSSM is an empirical model that produces high resolution, multi-layer, four dimensional cloud liquid water content fields. The MM5 with its utility programs such as TERRAIN, ... |
|
| F-14 Lantirn Flight Testing. The Cat is Back!! |
18 APR 96 |
30 pages |
| Authors:
William Mnich; NAVAL AIR WARFARE CENTER AIRCRAFT DIV PATUXENT RIVER MD
|
| The system is currently operational on both the F-15 and F-16. Shown here on the Strike Eagle are the key elements of LANTIRN, which features two independant pod-mounted sensors. On the left side is the Navigation pod containing both the Terrain-Following Radar and Navigation FLIR, images from which can be presented to the pilot on the Wide FOV raster HUD for low-level navigation. The targeting pod is carried on the ... |
|
| Representation, Modeling and Recognition of Outdoor Scenes |
JAN 96 |
109 pages |
| Authors:
Martin A. Fischler; Robert C. Bolles; SRI INTERNATIONAL MENLO PARK CA
|
| The goal of this project is to advance the state-of-the-art in scene interpretation for autonomous systems that operate in natural terrain. In particular, techniques are being developed for representing knowledge about complex cultural and natural environments so that a computer vision system can successfully plan, navigate, recognize and manipulate objects, and answer questions or make decisions relevent to this knowledge. The results to date include the development of new representations ... |
|
| ACTA Aeronautica Et Astronautica Sinica (Selected Articles) |
01 AUG 95 |
40 pages |
| Authors:
NATIONAL AIR INTELLIGENCE CENTER WRIGHT-PATTERSON AFB OH
|
| CONTENTS: The Doppler Radar Imaging Techniques, The Adaptive Angle Control Method of Terrain Following. ANNOTATION: ACTA Aeronautica Et Astronautica Sinica (Selected Articles)-- Translation. |
|
| An Intelligent Predictive Controller for Autonomous Vehicles |
02 MAY 1994 |
|
| Authors:
Alonzo Kelly; CARNEGIE-MELLON UNIV PITTSBURGH PA ROBOTICS INST
|
 | Performance of high speed rough terrain autonomous vehicles is compromised by inadequate real time response characteristics, poor models of vehicle dynamics and terrain following, and suboptimal allocation of limited computational resources. A new approach to high speed rough terrain autonomy is presented which solves these problems through a real-time managed response time strategy, a 3D state space dynamic's and terrain following model, and minimum throughput adaptive perception and planning strategies. ... |
|
| An Evaluation Framework for Designing a Night Vision, Computer-Based Trainer |
DEC 93 |
63 pages |
| Authors:
Eric W. Caudle; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| The mission requirement of low-level, nightime navigation employing night vision goggles has expanded. This has led to a greater demand for training NVG skills and initiated a requirement for a low-cost, desktop, computer-based trainer (CBT). A framework is presented in this thesis that includes a review of the technology available for designing a night vision CBT. System attributes and constraints are identified and analyzed; and evaluation criteria developed to allow ... |
|
| Case Study of Risk Management in the USAF LANTIRN Program |
93 |
|
| Authors:
Susan J. Bodilly; RAND CORP SANTA MONICA CA
|
| This case study was undertaken in conjunction with six others to develop a better understanding of the risks involved in weapon system development and whether government policies effectively aid in the management of those risks to reduce the probability or severity of negative outcomes. The purpose of the larger study of seven Air Force procurement programs is to provide information that might improve the decision environment in which weapon systems ... |
|
| Minefield Search and Object Recognition for Autonomous Underwater Vehicles |
MAR 92 |
257 pages |
| Authors:
Mark A. Compton; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Autonomous Underwater Vehicles (AUV) are an outstanding minefield search platform. Because of their stealthy nature, AUVs can be deployed in a potential minefield without the enemy's knowledge. They also minimize dangerous exposure to manned and more expensive naval assets. This thesis explores two important and related aspects of AUV minefield search: exhaustive sensor coverage of a minefield through effective path planning and underwater object recognition using the vehicle's sensors. The ... |
|
| Ground Collision Avoidance Using a Variable Incidence Altitude Measurement System for the A-7 Aircraft |
DEC 91 |
114 pages |
| Authors:
Thomas A. Hartung; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING
|
| This study examines the use of a forward looking sensor in the implementation of an automatic terrain following system. The effect of the incidence angle is studied as well as methodologies to include dynamic motion in the pointing of the sensor beam. The methods examined include fixed angle with respect to the aircraft, dynamics driven by a simple gain, and dynamics directed to gather the terrain information a fixed time ... |
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| Stochastic Model of Terrain Effects Upon the Performance of Land-Based Radars, |
SEP 1991 |
|
| Authors:
S. P. Tonkin; M. A. Wood; MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB
|
| A stochastic model of land clutter visibility and of terrain screening of targets, with particular application to low-flying targets under surveillance by a microwave land-based radar system, is described. The model is non-site-specific, but detailed. It allows radar performance measures such as the mean length of track to be obtained analytically, without averaging large numbers of site-specific simulations or requiring high fidelity terrain data. The trajectories of terrain-following targets are ... |
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| Expert System for the Tornado Ground-Based Check-Out System, |
SEP 1991 |
|
| Authors:
J. Fey; J. Marangos; M. Merx; W. Mansel; ADVISORY GROUP FOR AEROSPACE RESEARCH AND DEVELOPMENT NEUILLY-SUR-SEINE (FRAN CE)
|
| The maintenance effort in terms of time and cost of modern avionic systems is driven by the increasing complexity. To achieve the required operational availability of aircraft, the maintenance turn-around-times and logistic support needs to be optimized. Expert Systems seem to be a promising approach to increase the effectiveness of on-board and ground-based test and diagnosis systems. A knowledge based approach, using inference techniques, that can also handle uncertain and ... |
|
| Automation of Missile Flight Test Analysis and Report Generation |
02 JUL 90 |
18 pages |
| Authors:
Michael J. Desrosiers; Hillard A. Rosen; Steven Lopes; NAVAL UNDERWATER SYSTEMS CENTER NEWPORT RI
|
| To meet program objectives for consistent, timely, and thorough flight test reports during developmental testing of the Submunitions Tomahawk Land-Attack Missile, an Automated Flight Test Analysis and Report Writing Tool was developed by the Naval Underwater Systems Center, Newport, Rhode Island. This paper discusses the methods used to standardize flight test reports, design the flight test data base, select hardware and software components, reduce and store flight test data, filter ... |
|
| Technical Evaluation Report on the Guidance and Control Panel Symposium on Fault Tolerant Design Concepts for Highly Integrated Flight Critical Guidance and Control Systems (49th) Held in Toulouse, France on 10-13 October 1989 |
MAY 90 |
|
| Authors:
Bernard Chaillot; ADVISORY GROUP FOR AEROSPACE RESEARCH AND DEVELOPMENT NEUILLY-SUR-SEINE (FRAN CE)
|
| Evaluation Report on the Guidance and Control Panel 49th Symposium held at the Ecole Nationale Superieure de l'Aeronautique et de l'Espace in Toulouse, France, from 10th to 13th October 1989. In all 23 papers were presented including the Keynote address, covering the following headings: trends in integrated flight critical systems; advanced fault tolerant design concepts; system architectures, mechanization and integration issues; high integrity software design methodologies and algorithms; and system ... |
|
| Blending of Surface and Rawinsonde Data in Mesoscale Objective Analysis |
14 JUN 88 |
37 pages |
| Authors:
Samuel Y. Yee; Arthur J. Jackson; AIR FORCE GEOPHYSICS LAB HANSCOM AFB MA
|
| This report describes a simple technique to blend surface and rawinsonde observations in the planetary boundary layer (PBL) using a Barnes- type objective analysis. This goal is to improve the mesoscale detail of boundary layer input fields for a mesoscale numerical weather prediction model. The technique uses both surface and rawinsonde data in the boundary layer, where it is known that mesoscale details are inadequately resolved by the rawinsonde network ... |
|
| Modification of the BLUEMAX II Terrain Following Model to Incorporate Radar Detection |
MAR 88 |
|
| Authors:
Jeffrey D. Hearrell; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING
|
| The objective of this thesis was to show that introducing radar detection characteristics into one of the post-processors to BLUEMAX II, a terrain following/terrain avoidance model, would decrease the number of detections by radar against a target. Additionally, it sought to decrease computer (CPU) run time. The objectives were met through the writing and implementation of two programs. DETECT and MAXMIN. A third program, TFTAEXP, was modified. The radar parameters ... |
|
| Advances in Air-Launched Weapon Guidance and Control, Proceedings of the Guidance and Control Panel Symposium (44th) Held in Athens (Greece) on 5-8 May 1987 |
DEC 87 |
|
| Authors:
ADVISORY GROUP FOR AEROSPACE RESEARCH AND DEVELOPMENT NEUILLY-SUR-SEINE (FRAN CE)
|
| The symposium papers were presented under the following headings: Guidance data source advances; Flight path control advances; Operational requirements, systems considerations; Subsystem technology advances, guidance and control impacts; Test and evaluation techniques. The symposium concluded with a round table discussion. |
|
| An Evaluation of Ground Collision Avoidance System Algorithm |
OCT 1987 |
86 pages |
| Authors:
Horace A. Orr; Richard Geiselhart; Mark A. DiPadua; AERONAUTICAL SYSTEMS DIV WRIGHT-PATTERSON AFB OH
|
| Controlled flight into terrain (CFIT) accidents, which constitute the second largest category of tactical Air FOrce Class A mishaps, could be greatly reduced by installing forward-looking Terrain-Following Radar (TFR) Systems. In an effort to design a less costly solution to this problem, a software-oriented generic Ground Collision Avoidance System (GCAS) with application to more complex tactical missions was developed. A simulation study of the system evaluated the adequacy of the ... |
|
| Evaluation of Alternatives for Army Precision Landing System. Ground Guidance |
JUL 86 |
|
| Authors:
C. Boyd; J. Gruhler; R. Lewsen; ARINC RESEARCH CORP ANNAPOLIS MD
|
| This report deals with current and planned aircraft guidance systems as they apply to Army tactical precision landings in the combat environment. Self-contained avionics systems and less sophisticated systems have been evaluated. Ground guidance is defined as a means to safely, efficiently, and rapidly aid in the movement of aircraft from their transition point of landing to a final destination. The study addressed the following four tasks: 1) Review Army ... |
|
| Responses Biases with Virtual Imaging Displays |
JUN 1985 |
27 pages |
| Authors:
Joyce H. Iavecchia; NAVAL AIR DEVELOPMENT CENTER WARMINSTER PA
|
| The head-up display was developed to provide the pilot simultaneous viewing of flight information and the outside environment. The HUD optics were collimated so that the symbols appear at optical infinity as does the distant terrain. Operationally, about 30 percent of pilots experience an increased tendency toward spatial disorientation when using a HUD. Two experiments were conducted at NADC to determine whether HUD symbols do fact allow the eyes to ... |
|
| Effects of Side-Stick Controllers on Rotorcraft Handling Qualities for Terrain Flight |
APR 1985 |
16 pages |
| Authors:
Edwin W. Aiken; NATIONAL AERONAUTICS AND SPACE ADMINISTRATION MOFFETT FIELD CA AMES RESEARCHCENTER
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| Pertinent fixed-and rotary-wing feasibility studies and handling- qualities research programs are reviewed and the effects of certain controller characteristics on handling qualities for specific rotorcraft flight tasks are summarized. In particular, the effects of the controller force-deflection relationship and the number of controlled axes that are integrated in a single controller are examined. Simulation studies conducted as part of the Army's Advanced Digital/Optical Control Systems (ADOCS) program and flight research ... |
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