Hamiltonian 3-D Ray Tracing in the Oceanic Waveguide on the Ellipsoidal Earth

Ray equations based on an acoustic Hamiltonian, and formulated by Jones et al. (1986) for spherical coordinates in NOAA's three dimensional ray tracer HARPO, are adapted to ellipsoidal coordinates in the oceanic waveguide. The ensuing modified HARPO is used to model very long range (up to antip...

Full description

Bibliographic Details
Main Authors:	Dworski, George, Mercer, James A.
Other Authors:	WASHINGTON UNIV SEATTLE APPLIED PHYSICS LAB
Format:	Text
Language:	English
Published:	1990
Subjects:	Physical and Dynamic Oceanography Seismic Detection and Detectors TEST AND EVALUATION GLOBAL MODELS EXPERIMENTAL DESIGN PATHS COMPUTER ARCHITECTURE BOUNDARY LAYER WAVEGUIDES LONG RANGE(TIME) THREE DIMENSIONAL ELLIPSOIDS LONG RANGE(DISTANCE) COORDINATES HEATING PATTERNS ACOUSTICS OCEANS PILOT STUDIES EQUATIONS EARTH(PLANET) ASSIMILATION TRAVEL TIME INDIAN OCEAN ANTARCTIC REGIONS HAMILTONIAN FUNCTIONS CIRCLES COMPUTER PROGRAMS RAY TRACING OCEAN MODELS ACOUSTIC COMMUNICATIONS Antarctic Heard Island Indian Antarc* Antarctica
Online Access:	http://www.dtic.mil/docs/citations/ADA237458 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA237458

id	ftdtic:ADA237458
record_format	openpolar
spelling	ftdtic:ADA237458 2023-05-15T13:41:35+02:00 Hamiltonian 3-D Ray Tracing in the Oceanic Waveguide on the Ellipsoidal Earth Dworski, George Mercer, James A. WASHINGTON UNIV SEATTLE APPLIED PHYSICS LAB 1990-12 text/html http://www.dtic.mil/docs/citations/ADA237458 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA237458 en eng http://www.dtic.mil/docs/citations/ADA237458 Approved for public release; distribution is unlimited. DTIC AND NTIS Physical and Dynamic Oceanography Seismic Detection and Detectors TEST AND EVALUATION GLOBAL MODELS EXPERIMENTAL DESIGN PATHS COMPUTER ARCHITECTURE BOUNDARY LAYER WAVEGUIDES LONG RANGE(TIME) THREE DIMENSIONAL ELLIPSOIDS LONG RANGE(DISTANCE) COORDINATES HEATING PATTERNS ACOUSTICS OCEANS PILOT STUDIES EQUATIONS EARTH(PLANET) ASSIMILATION TRAVEL TIME INDIAN OCEAN ANTARCTIC REGIONS HAMILTONIAN FUNCTIONS CIRCLES COMPUTER PROGRAMS RAY TRACING OCEAN MODELS ACOUSTIC COMMUNICATIONS Text 1990 ftdtic 2016-02-22T20:14:31Z Ray equations based on an acoustic Hamiltonian, and formulated by Jones et al. (1986) for spherical coordinates in NOAA's three dimensional ray tracer HARPO, are adapted to ellipsoidal coordinates in the oceanic waveguide. The ensuing modified HARPO is used to model very long range (up to antipodal) acoustic paths in which the difference between geodesics and great circles is measurable. The eventual objective of this modeling is to extract the predictable part of the travel time trend and fluctuations along several long paths that will be used to monitor hypothetical global warming effects. The requirements for easy assimilation and representation of realistic environmental inputs are discussed. These requirements, when coupled with the possibility of classical chaos in the ray paths, dictate a new software architecture. We use the existing software, however, to breadboard and test features of new ray tracers in the global boundary layer, and to support the experimental design of a forthcoming pilot experiment that will use a transmitter located at Heard Island in the Indian Ocean near Antarctica. Text Antarc* Antarctic Antarctica Heard Island Defense Technical Information Center: DTIC Technical Reports database Antarctic Heard Island Indian
institution	Open Polar
collection	Defense Technical Information Center: DTIC Technical Reports database
op_collection_id	ftdtic
language	English
topic	Physical and Dynamic Oceanography Seismic Detection and Detectors TEST AND EVALUATION GLOBAL MODELS EXPERIMENTAL DESIGN PATHS COMPUTER ARCHITECTURE BOUNDARY LAYER WAVEGUIDES LONG RANGE(TIME) THREE DIMENSIONAL ELLIPSOIDS LONG RANGE(DISTANCE) COORDINATES HEATING PATTERNS ACOUSTICS OCEANS PILOT STUDIES EQUATIONS EARTH(PLANET) ASSIMILATION TRAVEL TIME INDIAN OCEAN ANTARCTIC REGIONS HAMILTONIAN FUNCTIONS CIRCLES COMPUTER PROGRAMS RAY TRACING OCEAN MODELS ACOUSTIC COMMUNICATIONS
spellingShingle	Physical and Dynamic Oceanography Seismic Detection and Detectors TEST AND EVALUATION GLOBAL MODELS EXPERIMENTAL DESIGN PATHS COMPUTER ARCHITECTURE BOUNDARY LAYER WAVEGUIDES LONG RANGE(TIME) THREE DIMENSIONAL ELLIPSOIDS LONG RANGE(DISTANCE) COORDINATES HEATING PATTERNS ACOUSTICS OCEANS PILOT STUDIES EQUATIONS EARTH(PLANET) ASSIMILATION TRAVEL TIME INDIAN OCEAN ANTARCTIC REGIONS HAMILTONIAN FUNCTIONS CIRCLES COMPUTER PROGRAMS RAY TRACING OCEAN MODELS ACOUSTIC COMMUNICATIONS Dworski, George Mercer, James A. Hamiltonian 3-D Ray Tracing in the Oceanic Waveguide on the Ellipsoidal Earth
topic_facet	Physical and Dynamic Oceanography Seismic Detection and Detectors TEST AND EVALUATION GLOBAL MODELS EXPERIMENTAL DESIGN PATHS COMPUTER ARCHITECTURE BOUNDARY LAYER WAVEGUIDES LONG RANGE(TIME) THREE DIMENSIONAL ELLIPSOIDS LONG RANGE(DISTANCE) COORDINATES HEATING PATTERNS ACOUSTICS OCEANS PILOT STUDIES EQUATIONS EARTH(PLANET) ASSIMILATION TRAVEL TIME INDIAN OCEAN ANTARCTIC REGIONS HAMILTONIAN FUNCTIONS CIRCLES COMPUTER PROGRAMS RAY TRACING OCEAN MODELS ACOUSTIC COMMUNICATIONS
description	Ray equations based on an acoustic Hamiltonian, and formulated by Jones et al. (1986) for spherical coordinates in NOAA's three dimensional ray tracer HARPO, are adapted to ellipsoidal coordinates in the oceanic waveguide. The ensuing modified HARPO is used to model very long range (up to antipodal) acoustic paths in which the difference between geodesics and great circles is measurable. The eventual objective of this modeling is to extract the predictable part of the travel time trend and fluctuations along several long paths that will be used to monitor hypothetical global warming effects. The requirements for easy assimilation and representation of realistic environmental inputs are discussed. These requirements, when coupled with the possibility of classical chaos in the ray paths, dictate a new software architecture. We use the existing software, however, to breadboard and test features of new ray tracers in the global boundary layer, and to support the experimental design of a forthcoming pilot experiment that will use a transmitter located at Heard Island in the Indian Ocean near Antarctica.
author2	WASHINGTON UNIV SEATTLE APPLIED PHYSICS LAB
format	Text
author	Dworski, George Mercer, James A.
author_facet	Dworski, George Mercer, James A.
author_sort	Dworski, George
title	Hamiltonian 3-D Ray Tracing in the Oceanic Waveguide on the Ellipsoidal Earth
title_short	Hamiltonian 3-D Ray Tracing in the Oceanic Waveguide on the Ellipsoidal Earth
title_full	Hamiltonian 3-D Ray Tracing in the Oceanic Waveguide on the Ellipsoidal Earth
title_fullStr	Hamiltonian 3-D Ray Tracing in the Oceanic Waveguide on the Ellipsoidal Earth
title_full_unstemmed	Hamiltonian 3-D Ray Tracing in the Oceanic Waveguide on the Ellipsoidal Earth
title_sort	hamiltonian 3-d ray tracing in the oceanic waveguide on the ellipsoidal earth
publishDate	1990
url	http://www.dtic.mil/docs/citations/ADA237458 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA237458
geographic	Antarctic Heard Island Indian
geographic_facet	Antarctic Heard Island Indian
genre	Antarc* Antarctic Antarctica Heard Island
genre_facet	Antarc* Antarctic Antarctica Heard Island
op_source	DTIC AND NTIS
op_relation	http://www.dtic.mil/docs/citations/ADA237458
op_rights	Approved for public release; distribution is unlimited.
_version_	1766152612554473472

Hamiltonian 3-D Ray Tracing in the Oceanic Waveguide on the Ellipsoidal Earth

Similar Items