Search Results - "Spiesberger, J L"

Dimension Reduction in Location Estimation—the Need for Variable Propagation Speed by Spiesberger, J. L.

“…Calling mammals, ships, and many other objects have been commonly located during the last century with two-dimensional (2D) models from measurements of a…”
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Hyperbolic location errors due to insufficient numbers of receivers by Spiesberger, J L

“…Animal locations are sometimes estimated by measuring the difference in travel times of their sounds at pairs of receivers. Ideally, each difference specifies…”
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An updated perspective on basin-scale tomography by Spiesberger, J L

“…There seems to be little doubt that pulse-like acoustic transmissions at 1000 to 5000 km can be used to measure small changes in average temperature in many…”
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Passive Localization of Calling Animals and Sensing of their Acoustic Environment Using Acoustic Tomography by Spiesberger, John L., Fristrup, Kurt M.

“…When monitored by several acoustic receivers, the sounds emitted by terrestrial and marine animals can be used to localize their positions. The localization…”
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Can acoustic multipath explain finback ( B. physalus ) 20-Hz doublets in shallow water? by Premus, V., Spiesberger, J. L.

“…A broadband acoustic propagation code is combined with an empirically derived geoacoustic seafloor model for the purpose of interpreting finback doublet…”
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Listening for climatic temperature change in the northeast Pacific : 1983-1989 by SPIESBERGER, J. L, METZGER, K, FURGERSON, J. A

“…Data are presented from an acoustic experiment designed to detect climatic trends of temperature in the ocean with basin-scale resolution. These data are…”
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Probability distributions for locations of calling animals, receivers, sound speeds, winds, and data from travel time differences by SPIESBERGER, John L

“…A new nonlinear sequential Monte Carlo technique is used to estimate posterior probability distributions for the location of a calling animal, the locations of…”
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Regions where transient signals are influenced between a source and receiver by Spiesberger, J. L.

“…At infinite frequency, the only place that a medium can influence the waveform of a received signal that is emitted from a source is along one or more…”
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Ocean acoustic tomography - Travel time biases by Spiesberger, J. L.

“…The travel times of acoustic rays traced through a climatological sound-speed profile are compared with travel times computed through the same profile…”
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Locating animals from their sounds and tomography of the atmosphere: experimental demonstration by Spiesberger, J L

“…Calling animals are located using widely distributed receivers, and the sounds from the animals are used to map the sound speed and wind fields by means of…”
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Geometry of locating sounds from differences in travel time: Isodiachrons by SPIESBERGER, John L

“…Calling animals may be located from measurements of the differences in acoustic travel time at pairs of receivers. For inhomogeneous fields of speed, locations…”
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Acoustic identification of a single transmission at 3115 km from a bottom-mounted source at Kauai by Spiesberger, John L.

“…Sounds received in the Gulf of Alaska at 3115 km from the ATOC/NPAL source at Kauai (75 Hz, 0.027-s resolution, bottom-mounted) are compared with acoustic and…”
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A new algorithm for sound speed in seawater by SPIESBERGER, J. L, METZGER, K

“…Travel times of acoustic pulses across a 3000-km section in the northeast Pacific are used to estimate an algorithm for the speed of sound in seawater. This…”
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Tidal signals in basin-scale acoustic transmissions by HEADRICK, R. H, SPIESBERGER, J. L, BUSHONG, P. J

“…Travel times of acoustic signals were measured between a bottom-mounted source near Oahu and five bottom-mounted receivers located near Washington, Oregon, and…”
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Estimating climatic temperature change in the ocean with synthetic acoustic apertures by Fabrikant, A.L., Spiesberger, J.L., Silivra, A.A., Hurlburt, E.E.

“…An acoustic tomography simulation is carried out in the eastern North Pacific ocean to assess whether climate trends are better detected and mapped with mobile…”
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The matched-lag filter: detecting broadband multipath signals with auto- and cross-correlation functions by Spiesberger, J L

“…Signal detection is considered for uncertain noise variance and a broadband source of unknown waveform and emission time. The signal travels to the receivers…”
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Mapping climatic temperature changes in the ocean with acoustic tomography: navigational requirements by Spiesberger, J.L., Fabrikant, A.L., Silivra, A.A., Hurlburt, H.E.

“…In eddy-resolving hydrodynamic models, first-mode baroclinic Rossby waves linked to El Nino/Southern Oscillation are the dominant features which change…”
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Acoustic tomography at basin scales and clock errors by Silivra, A.A., Spiesberger, J.L., Fabrikant, A.L., Hurlburt, H.E.

“…A basin-scale acoustic tomography simulation is carried out for the northeast Pacific Ocean to determine the accuracy with which time must be kept at the…”
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U.S. Navy sources and receivers for studying acoustic propagation and climate change in the ocean by Spiesberger, John L

“…Sounds from a U.S. Navy SSQ-110A source are received at high signal-to-noise ratios at ocean-basin scales at two Sound Surveillance Systems in the Pacific. The…”
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Time domain analysis of normal mode, parabolic, and ray solutions of the wave equation by BODEN, L, BOWLIN, J. B, SPIESBERGER, J. L

“…Estimation of sound speed and temperature fields from tomographic data requires knowledge of the accuracy of the forward model. For this reason, time domain…”
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