The Reflection of Low Frequency Sonar Signals from a Smooth Ocean Bottom. Part I. Experimental Reflection Losses at Locations off the California Coast and in the Bering Sea
Underwater acoustic tests in three different areas are discussed: Area I is in 200-fathom water while Areas II and III are deep-water, 2000-fathom areas. From the data obtained bottom reflection losses were computed as a function of grazing angle for low frequency, 0.7 to 3.0 kc sound pulses. Measur...
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ftdtic:ADA074407 2023-05-15T15:43:29+02:00 The Reflection of Low Frequency Sonar Signals from a Smooth Ocean Bottom. Part I. Experimental Reflection Losses at Locations off the California Coast and in the Bering Sea Whitney,J A Yee,G S Gardner,R R NAVY ELECTRONICS LAB SAN DIEGO CA 1963-01 text/html http://www.dtic.mil/docs/citations/ADA074407 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA074407 en eng http://www.dtic.mil/docs/citations/ADA074407 APPROVED FOR PUBLIC RELEASE DTIC AND NTIS Acoustic Detection and Detectors Acoustics *SONAR SIGNALS *BOTTOM LOSS UNDERWATER ACOUSTICS ACOUSTIC VELOCITY OCEAN BOTTOM TOPOGRAPHY LOW FREQUENCY OCEAN BOTTOM SOILS NORTH PACIFIC OCEAN ACOUSTIC REFLECTION SEA TESTING BERING SEA MOST Project-2 Text 1963 ftdtic 2016-02-20T16:54:16Z Underwater acoustic tests in three different areas are discussed: Area I is in 200-fathom water while Areas II and III are deep-water, 2000-fathom areas. From the data obtained bottom reflection losses were computed as a function of grazing angle for low frequency, 0.7 to 3.0 kc sound pulses. Measurements in Area I utilized short pulses and acoustic-path geometries that would resolve the bottom reflected paths; the analysis was then accomplished by comparing the direct signal with the signal which suffers one bottom reflection. The experiments in the deep-water areas did not attempt acoustic path resolution and the bottom loss was derived from the difference between the measured propagation loss and the theoretical propagation loss for that range and for total reflection at the grazing angle. See also Part 2, AD-A074 408. Text Bering Sea Defense Technical Information Center: DTIC Technical Reports database Bering Sea Pacific |
institution |
Open Polar |
collection |
Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Acoustic Detection and Detectors Acoustics *SONAR SIGNALS *BOTTOM LOSS UNDERWATER ACOUSTICS ACOUSTIC VELOCITY OCEAN BOTTOM TOPOGRAPHY LOW FREQUENCY OCEAN BOTTOM SOILS NORTH PACIFIC OCEAN ACOUSTIC REFLECTION SEA TESTING BERING SEA MOST Project-2 |
spellingShingle |
Acoustic Detection and Detectors Acoustics *SONAR SIGNALS *BOTTOM LOSS UNDERWATER ACOUSTICS ACOUSTIC VELOCITY OCEAN BOTTOM TOPOGRAPHY LOW FREQUENCY OCEAN BOTTOM SOILS NORTH PACIFIC OCEAN ACOUSTIC REFLECTION SEA TESTING BERING SEA MOST Project-2 Whitney,J A Yee,G S Gardner,R R The Reflection of Low Frequency Sonar Signals from a Smooth Ocean Bottom. Part I. Experimental Reflection Losses at Locations off the California Coast and in the Bering Sea |
topic_facet |
Acoustic Detection and Detectors Acoustics *SONAR SIGNALS *BOTTOM LOSS UNDERWATER ACOUSTICS ACOUSTIC VELOCITY OCEAN BOTTOM TOPOGRAPHY LOW FREQUENCY OCEAN BOTTOM SOILS NORTH PACIFIC OCEAN ACOUSTIC REFLECTION SEA TESTING BERING SEA MOST Project-2 |
description |
Underwater acoustic tests in three different areas are discussed: Area I is in 200-fathom water while Areas II and III are deep-water, 2000-fathom areas. From the data obtained bottom reflection losses were computed as a function of grazing angle for low frequency, 0.7 to 3.0 kc sound pulses. Measurements in Area I utilized short pulses and acoustic-path geometries that would resolve the bottom reflected paths; the analysis was then accomplished by comparing the direct signal with the signal which suffers one bottom reflection. The experiments in the deep-water areas did not attempt acoustic path resolution and the bottom loss was derived from the difference between the measured propagation loss and the theoretical propagation loss for that range and for total reflection at the grazing angle. See also Part 2, AD-A074 408. |
author2 |
NAVY ELECTRONICS LAB SAN DIEGO CA |
format |
Text |
author |
Whitney,J A Yee,G S Gardner,R R |
author_facet |
Whitney,J A Yee,G S Gardner,R R |
author_sort |
Whitney,J A |
title |
The Reflection of Low Frequency Sonar Signals from a Smooth Ocean Bottom. Part I. Experimental Reflection Losses at Locations off the California Coast and in the Bering Sea |
title_short |
The Reflection of Low Frequency Sonar Signals from a Smooth Ocean Bottom. Part I. Experimental Reflection Losses at Locations off the California Coast and in the Bering Sea |
title_full |
The Reflection of Low Frequency Sonar Signals from a Smooth Ocean Bottom. Part I. Experimental Reflection Losses at Locations off the California Coast and in the Bering Sea |
title_fullStr |
The Reflection of Low Frequency Sonar Signals from a Smooth Ocean Bottom. Part I. Experimental Reflection Losses at Locations off the California Coast and in the Bering Sea |
title_full_unstemmed |
The Reflection of Low Frequency Sonar Signals from a Smooth Ocean Bottom. Part I. Experimental Reflection Losses at Locations off the California Coast and in the Bering Sea |
title_sort |
reflection of low frequency sonar signals from a smooth ocean bottom. part i. experimental reflection losses at locations off the california coast and in the bering sea |
publishDate |
1963 |
url |
http://www.dtic.mil/docs/citations/ADA074407 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA074407 |
geographic |
Bering Sea Pacific |
geographic_facet |
Bering Sea Pacific |
genre |
Bering Sea |
genre_facet |
Bering Sea |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/ADA074407 |
op_rights |
APPROVED FOR PUBLIC RELEASE |
_version_ |
1766377633259454464 |