Passive acoustic target motion analysis

by George Edward Olcovich

Written in English
Published: Pages: 209 Downloads: 423
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Subjects:

  • Electrical and computer engineering
The Physical Object
Pagination209 p.
Number of Pages209
ID Numbers
Open LibraryOL25480071M

This study addresses the problem of tracking acoustically a moving source in shallow water, which is challenged by multi-path sound propagation. A specific source of interest is an autonomous underwater vehicle with periodic sound transmissions. Given a simple horizontal linear receiving array, the authors develop a Bayesian tracking method based on measurements of signal arriving angle and. The analysis of trajectory semantics and motion patterns is crucial to human behavior research, and extensive research is already being conducted on the extraction of human motion patterns by modern observation technologies such as video surveillance, mobile location tracking, GPS receivers, and sensor networks [1,2,3,4,5,6].As one of the most widely used sensors, passive infrared (PIR. The analysis was done using Matlab™-based analysis software to visualize and annotate acoustic data sets. When searching for time periods with vocal activity, consecutive sound files of 1 minute duration (high-pass filtered at 5 kHz) were screened visually by the analyst using the following spectrogram parameters: frame size and FFT size Designing passive sonar arrays with SIGMA modelling software Acoustic target strength prediction of underwater objects. Almgren, M. / Kallman, Target motion analysis with nonlinearity compensation extended Kalman filter. Fujimoto, O. / Okita, Y. / Ozaki.

The target is free to maneuver in velocity and to make depth changes at times unknown to the observer. Tracking is accomplished by using the basic polar model of target and observer motion previously developed, and included in this report for the convenience of the reader. Figure 4. Example of target motion analysis feature of PAMGuard's ViewerMode software. As indicated by the model results panel, a least-squares-fit is used to obtain a port and starboard localization to the sperm whale event and PAMGuard indicates which of these two localizations. Training courses for Passive Acoustic Monitoring Operators in Australia, South Africa and the United Kingdom. Please click on one of the links below for more details on the training courses: Overview Dates Timetable Locations Testimonials Accommodation Register. As with electronic emissions, acoustic emissions should be kept to a minimum and, if possible, only after counter-detection has occurred. However, if analysis of the FOM problem indicates that passive detection of an enemy is not likely then we may be forced to go active. Active operation must take into account the tactical situation.

underwater acoustic sensor an example, anAUV has the capability to adapt its motion to purposefully impart a specific structure to the received field to optimize extrac-tion of quantities of interest. This concept of active control of received acoustic fields through receiver motion is pursued further in this paper.

Passive acoustic target motion analysis by George Edward Olcovich Download PDF EPUB FB2

A single active sonar can localize in range and bearing as well as measuring radial speed. However, a single passive sonar can only localize in bearing directly, though Target Motion Analysis can be used to localize in range, given time.

Multiple passive sonars can be used for range localization by triangulation or correlation, directly. This book contains the papers that were accepted for presentation at the NATO Advanced Study Institute on Underwater Acoustic Data Processing, held at the Royal Military College of Canada from 18 to 29 July, Approximately participants from various NATO countries were in attendance during this two week period.

Their research interests range from underwater acoustics to signal. Target Motion Analysis (TMA) is a process to determine the position of a target using passive sensor s like passive RADAR and SONAR provide directional and occasionally frequency information.

TMA is done by marking from which direction the sound comes at different times, and comparing the motion with that of the operator's own ship. A target angular information in 3-dimensional space consists of an elevation angle and azimuth angle.

Acoustic signals propagating along multiple paths in underwater environments usually have different elevation angles.

Target motion analysis (TMA) uses the underwater acoustic signals received by a passive horizontal line array to track an underwater : Raegeun Oh, Taek Lyul Song, Jee Woong Choi. Abstract: A nonlinear least-squares method is formulated to estimate the motion parameters of a target whose broadband acoustic energy emissions are received by a ground-based array of sensors.

This passive technique is applied to real acoustic sensor data recorded during the passage of a variety of ground vehicles past a planar cross array and its effectiveness verified by comparing the Cited by: Another use of the passive sonar is to determine the target's trajectory.

This process is called Target Motion Analysis (TMA), and the resultant "solution" is the target's range, course, and speed.

TMA is done by marking from which direction the sound comes at different times, and comparing the motion with that of the operator's own ship. RICHARD P. HODGES has forty years experience in sonar, operations analysis, modeling, and the simulation of military systems.

He is currently working for Sonalysts, Inc as a principal analyst, and is a member of the Acoustic Society of America. He has taught courses at the Naval Underwater Warfare Center (NUWC) and elsewhere in naval analysis of sonar, acoustics, TMA.

A subproblem in target tracking is the target motion analysis (TMA) problem. The classical TMA problem involves estimation of target state including position, course and speed.

Acoustic emission (AE) analysis (ASNT ) is based on passive detection of dynamic surface motion caused by elastic stress or pressure waves.

Such waves are generated by the spontaneous, sudden release of elastically stored energy during micro- or macro-failure, resulting in burst-type transient AE signals with identifiable beginning and end.

Systolic array implementation of parallel Kalman filtering for heave compensation in underwater acoustic data processing.- TMA performance for towed arrays of low manoeuvrability.- Multi-tracks association for underwater passive listening.- New observability criterion in target motion analysis.- Bearings only target motion analysis This book contains the papers that were accepted for presentation at the NATO Advanced Study Institute on Underwater Acoustic Data Processing, held at the Royal Military College of Canada from 18 to 29 July, Approximately participants from various NATO countries were in attendance.

I have published two books and authored around peer-reviewed book chapters, journal articles, research reports, and conference papers. Viability and real world performance envelope of passive acoustic sense detect and avoid for small UAVs Three-dimensional target motion analysis using passive measurements.

Given the secenario described in Fig. 1, we assume that the target constantly emits a single tone at frequency f 0 while moving on each linear segment at constant speed sensor in the field measures the acoustic signature of the target after the target's tonal has propagated underwater at a constant sound speed r, each sensor measures a distinct variant of the target signature.

Abstract. New methods of target motion analysis (TMA) are discussed. In contrast to conventional TMA techniques, which use sequences of bearing and/or frequency estimates as their inputs, these methods do not partition the detection and TMA functions within the sonar processor.

Advisian prefers to monitor marine fauna using a range of passive and active acoustic monitoring techniques that provide improved detection and protection of marine fauna, whilst reducing costs associated with labour and vessels and providing a safer working environment.

This method provides data in real-time, 24 hours a day on a secure website. Book Search tips Selecting this option will search all publications across the Scitation platform Selecting this option will bearings-only target motion analysis in modified polar coordinates via the extended Kalman filter, and (4) bearings and H.

Matsumoto, “ An overview of fixed passive acoustic observation methods for cetaceans. The slow motion of the spar buoy, especially in the presence of strong winds and currents, can influence the acoustic measurements, thus, the wave mater package was inclusive of vertical accelerometers and a couple of two axis orthogonal inclinometers installed along the horizontal axis to correct the acquired data for the buoy motion.

This book contains the papers that were accepted for presentation at the NATO Advanced Study Institute on Underwater Acoustic Data Processing, held at the Royal Military College of Canada from 18 to 29 July, Approximately participants from various NATO countries were in attendance during this two week period.

Target motion analysis (TMA) visualisation is used by naval ships to locate targets around ownship when more accurate methods such as active sonar are not viable. TMA utilises an array of data, the main source being passive sonar, and results in an almost infinite number of possible solutions.

Databases of unique engine sounds are part of what is known as acoustic intelligence or ACINT. Another use of passive sonar is to determine the target's trajectory. This process is called Target Motion Analysis (TMA), and the resultant "solution" is the target's range, course, and speed.

TMA is done by marking from which direction the sound. Digital signal processing has had an enormous effect. Before computer assistance was available, passive sonar was useful only to give general warnings. Combining long, hull-mounted or towed microphone arrays with signal processing resulted in target motion analysis, often both providing detection and sufficient localization to use a guided weapon.

Offering complete and comprehensive coverage of modern sonar spectrum system analysis, Underwater Acoustics: Analysis, Design and Performance of Sonar provides a state-of-the-art introduction to the subject and has been carefully structured to offer a much-needed update to the classic text by Urick.

Expanded to included computational approaches to the topic, this book treads the line between. Passive acoustic detection systems have existed for many years and have been used in the detection of various sound sources, including underwater, water surface, ground, underground and airborne targets.

With the advances of electronics, computing power and. Target Motion Analysis (TMA) is generally used. An ownship monitors noisy sonar bearings from a radiating target and finds out Target Motion Parameters (TMP) - viz., range, course, bearing and speed of the target.

The basic assump-tions are that the target moves at constant velocity most of the time and the ownship motion is unrestricted. The target motion analysis (TMA) for a moving scanning emitter with known fixed scan rate by a single observer using the time of interception (TOI) measurements only is investigated in this paper.

Find the books you want all in one place and at prices you'll love. Target has all the major genres and best sellers. Free shipping on orders $35+ and save 5% with your RedCard. Broadband passive acoustic technique for target motion parameter estimation.

Passive acoustic monitoring was conducted using a towed-hydrophone array system. One of the main objectives of the acoustic survey was to obtain an acoustic-based density estimate for sperm whales. A total of acoustic encounters of sperm whales during 6, km of effort were obtained compared to 19 visual encounters during 4, km of effort.

Acoustic location is the use of sound to determine the distance and direction of its source or reflector. Location can be done actively or passively, and can take place in gases (such as the atmosphere), liquids (such as water), and in solids (such as in the earth).

An single active sonar can localise in range and bearing as well as measuring radial speed. However, a single passive sonar can only localise in bearing directly, though target motion analysis can be used to localise in range, given time. Multiple passive sonars can be used for range localisation by triangularisation or correlation, directly.

In a passive sonar system, the source is the target itself. The same terminology applies to passive sources, namely the source level, SL. Of course, the source level is generally not known beforehand. However, source levels for hostile targets can be measured through intelligence gathering efforts, which cannot be discussed here.Marine Mammal Observer and Passive Acoustic Monitoring Handbook is the ultimate instruction manual for mitigation measures to minimise man-made acoustical and physical disturbances to marine mammals from industrial and defence activities.

water depth and the hearing sensitivities of receivers, which for the purpose of this book are marine.Approaches for instantaneous passive source localization using a towed horizontal receiver array in a random range-dependent ocean waveguide are examined.

They include: (1) Moving array triangulation, (2) array invariant, (3) bearings-only target motion analysis in modified polar coordinates via the extended Kalman filter, and (4) bearings.