Download or read book A Search for Means to Detect Distant Low flying Aircraft written by Eugene W. Pike and published by . This book was released on 1957 with total page 107 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Capabilities of Ground Observers to Locate Recognize and Estimate Distance of Low flying Aircraft written by Robert D. Baldwin and published by . This book was released on 1973 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Visual Detection Probability written by Shirley Blackett and published by . This book was released on 1960 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Procedure for Predicting Radar Detection of Low Flying Aircraft written by Jerry Allen Coker and published by . This book was released on 1962 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aircraft Detection Range Estimation and Auditory Tracking Tests in a Desert Environment written by Edward W. Frederickson and published by . This book was released on 1967 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: Detection tests with low-flying jet aircraft were conducted to determine the effect of (a) varying the location of observers from the flight path, (b) using optical aids vs. unaided observation, and (c) varying the amount of temporal early warning. Also tested were man's ability to (a) visually estimate the distance to high-speed jets, (b) track aircraft by ear, and (c) determine the distances at which various aircraft structural features were recognized. When distant terrain masking existed, unaided and optically aided detections occurred at approximately the same time. However, when near terrain masking existed, unaided detections occurred sooner. Using binoculars resulted in earlier recognition of structural features. A change from one minute to five minutes of temporal early warning did not affect detection range. As offset increased from 200 meters to 3,300 meters, detection range increased. The range estimation tests were inconclusive. The results of the auditory tracking tests suggest that it may be possible to extend the capabilities of some fair weather air defense systems to poor visibility conditions. The order in which structural features were recognized was different between fighters and bombers, but there were consistencies within each class of aircraft.
Download or read book U S Government Research Reports written by and published by . This book was released on 1959 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Remote Sensing in Vessel Detection and Navigation written by Henning Heiselberg and published by MDPI. This book was released on 2020-12-11 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Special Issue entitled “Remote Sensing in Vessel Detection and Navigation” comprises 15 articles on many topics related to remote sensing with navigational sensors. The sequence of articles included in this Special Issue is in line with the latest scientific trends. The latest developments in science, including artificial intelligence, were used. It can be said that navigation and vessel detection remain important and hot topics, and a lot of work will continue to be done worldwide. New techniques and methods for analyzing and extracting information from navigational sensors and data have been proposed and verified. Some of these will spark further research, and some are already mature and can be considered for industrial implementation and development.
Download or read book Neural Network Classification Approach to Clutter Removal for UTM enabling Low altitude Radar Surveillance written by Brandon L. Emshoff and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Small unmanned aerial systems (sUAS) pose an ever-increasing threat to low-altitude aircraft, particularly those unequipped with automatic dependent surveillance – broadcast (ADS-B) trackers. Surveillance and tracking systems must be developed to find these low-flying aircraft and alert remote pilots to their location, especially for beyond visual line of sight (BVLOS) operations. Radar is introduced as one such means for this surveillance that is independent of the sUAS and aircraft systems operating within the surveillance volume. The downside to radar at such extremely low-altitude environments, however, is the large volume of radar “clutter” returns that arise from ground vehicles, weather, birds, trees, etc. For radar to be useful as the surveillance method of choice, these clutter returns must be filtered out of the radar feeds so remote pilots have the clearest and most complete picture of the surrounding airspace possible. This work proposes a neural network classifier as the tool of choice in decluttering the radar feeds. A neural network algorithm requires no known models of aircraft and clutter behavior inside the surveillance volume. The only requirement for training the model is a labeled set of radar returns spanning a few days. This thesis describes the process for building this classification model, while also providing a method for labeling radar data, building a feature set for the neural network to learn from, and supplementing training data due to the lack of physical radar tracks for specific use cases. The proposed model in this work is shown to reduce clutter in the radar feeds by over 80% in most cases, while correctly identifying more than 94% of aircraft. This research lays the groundwork for future real-time classification algorithms and provides insight and suggestions for means of future improvement.
Download or read book Technical Report EE written by University of New Mexico. Engineering Experiment Station and published by . This book was released on 1962 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Unclassified Publications of Lincoln Laboratory written by Lincoln Laboratory and published by . This book was released on 1951 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fundamentals of Electronics written by United States. Bureau of Naval Personnel and published by . This book was released on 1964 with total page 734 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Naval Shore Electronics Criteria written by United States. Naval Electronic Systems Command and published by . This book was released on 1972 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book National Search and Rescue Manual written by United States. Coast Guard and published by . This book was released on 1959 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Propagation of Sound in Air written by John W. Wescott and published by . This book was released on 1965 with total page 650 pages. Available in PDF, EPUB and Kindle. Book excerpt: This bibliography contains several thousand abstracts from the unclassified literature on the propagation of sound in air. The subject is treated in depth for the years 1929 to 1963. Some abstracts on earlier works of lasting interest and many abstracts from English translations of foreign journals are included. The abstracts are grouped according to subject matter. Subject and author indexes are furnished. Accessions Document (AD and earlier ATI) numbers used by both the Defense Documentation Center (formerly ASTIA) and the Office of Technical Services (OTS) are furnished wherever possible. (Author).
Download or read book Shipboard Electronics Material Officer written by Earl F. Roe and published by . This book was released on 1982 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fire Controlman Volume 2 Fire Contral Radar Fundamentals Training Manual TRAMAN and Nonresident Training Course NRTC April 1997 written by and published by . This book was released on 1997 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Weapons Officer written by Earnest E. Hall and published by . This book was released on 1986 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
