{"id":{"repo_id":"woods-hole","oai_identifier":"oai:darchive.mblwhoilibrary.org:1912/1542"},"canonical_url":"https://search.dev.ndltd.org/etd/woods-hole/oai:darchive.mblwhoilibrary.org:1912/1542","repository":{"repo_id":"woods-hole","name":"Woods Hole Oceanographic Institute","base_url":"https://darchive.mblwhoilibrary.org/server/oai/request"},"display":{"title":"Analysis of a high resolution deep ocean acoustic navigation system","abstract":"A high resolution acoustic navigation system for ocean use is being developed at the Woods Hole oceanographic Institution. The system can yield navigation fixes with respect to a bottom moored reference net with accuracies (on a fix to fix basis) of a few centimeters. In order to use the system to best advantage a survey is required to determine precisely the relative positions of the net elements. Each element combines a pulse transponder with a continuous wave (CW) beacon. Accumulated phase (Doppler shift of the CW beacon) between survey points is measured as well as acoustic travel times between survey points and transponders. Non-linear regression techniques are employed to develop a maximum likelihood estimator for net element positions based on these phase and travel time measurements. An approximate error covariance matrix is generated and an optimum choice of survey points is indicated., The combined system, using these selected locations for performing the survey, can yield reference mooring coordinates with error of ±1 meter. Improved precision appears to be limited by inaccuracies in the pulse and Doppler measuring system.","abstract_html":"A high resolution acoustic navigation system for ocean use is being developed at the Woods Hole oceanographic Institution. The system can yield navigation fixes with respect to a bottom moored reference net with accuracies (on a fix to fix basis) of a few centimeters. In order to use the system to best advantage a survey is required to determine precisely the relative positions of the net elements. Each element combines a pulse transponder with a continuous wave (CW) beacon. Accumulated phase (Doppler shift of the CW beacon) between survey points is measured as well as acoustic travel times between survey points and transponders. Non-linear regression techniques are employed to develop a maximum likelihood estimator for net element positions based on these phase and travel time measurements. An approximate error covariance matrix is generated and an optimum choice of survey points is indicated., The combined system, using these selected locations for performing the survey, can yield reference mooring coordinates with error of ±1 meter. Improved precision appears to be limited by inaccuracies in the pulse and Doppler measuring system.","abstract_has_math":false,"creators":["Durham, James Leighton"],"institution":"Massachusetts Institute of Technology and Woods Hole Oceanographic Institution","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1975,"date_issued":"1975-01","date_published":"1975-01","updated_at":"2026-07-27T22:05:10Z","subjects":["Underwater navigation","Estimation theory","Regression analysis"],"languages":["en_US"],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier.doi","label":"DOI","values":["10.1575/1912/1542"],"render_values":[{"text":"10.1575/1912/1542","href":"https://doi.org/10.1575/1912/1542","code":true}]}]},"links":{"outbound_url":"https://hdl.handle.net/1912/1542","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Durham, James Leighton"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2007-04-02T19:36:52Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2007-04-02T19:36:52Z"]},{"key":"dc:date.issued","label":"Date","values":["1975-01"]},{"key":"dc:publisher","label":"Institution","values":["Massachusetts Institute of Technology and Woods Hole Oceanographic Institution"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Underwater navigation","Estimation theory","Regression analysis"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["en_US"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.doi","label":"DOI","values":["10.1575/1912/1542"]},{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://hdl.handle.net/1912/1542"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Submitted in partial fulfillment of the requirements for the degree of Ocean Engineer at the Woods Hole Oceanographic Institution and the Massachusetts Institute of Technology and for the degree of Master of Science in Ocean Engineering at the Massachusetts Institute of Technology January, 1975"]},{"key":"dc:description.abstract","label":"Abstract","values":["A high resolution acoustic navigation system for ocean use is being developed at the Woods Hole oceanographic Institution. The system can yield navigation fixes with respect to a bottom moored reference net with accuracies (on a fix to fix basis) of a few centimeters. In order to use the system to best advantage a survey is required to determine precisely the relative positions of the net elements. Each element combines a pulse transponder with a continuous wave (CW) beacon. Accumulated phase (Doppler shift of the CW beacon) between survey points is measured as well as acoustic travel times between survey points and transponders. Non-linear regression techniques are employed to develop a maximum likelihood estimator for net element positions based on these phase and travel time measurements. An approximate error covariance matrix is generated and an optimum choice of survey points is indicated., The combined system, using these selected locations for performing the survey, can yield reference mooring coordinates with error of ±1 meter. Improved precision appears to be limited by inaccuracies in the pulse and Doppler measuring system."]},{"key":"dc:format.mimetype","label":"Dc Format Mimetype","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Analysis of a high resolution deep ocean acoustic navigation system"]}]}],"canonical_facts":{"dc:creator":["Durham, James Leighton"],"dc:date.accessioned":["2007-04-02T19:36:52Z"],"dc:date.available":["2007-04-02T19:36:52Z"],"dc:date.issued":["1975-01"],"dc:description":["Submitted in partial fulfillment of the requirements for the degree of Ocean Engineer at the Woods Hole Oceanographic Institution and the Massachusetts Institute of Technology and for the degree of Master of Science in Ocean Engineering at the Massachusetts Institute of Technology January, 1975"],"dc:description.abstract":["A high resolution acoustic navigation system for ocean use is being developed at the Woods Hole oceanographic Institution. The system can yield navigation fixes with respect to a bottom moored reference net with accuracies (on a fix to fix basis) of a few centimeters. In order to use the system to best advantage a survey is required to determine precisely the relative positions of the net elements. Each element combines a pulse transponder with a continuous wave (CW) beacon. Accumulated phase (Doppler shift of the CW beacon) between survey points is measured as well as acoustic travel times between survey points and transponders. Non-linear regression techniques are employed to develop a maximum likelihood estimator for net element positions based on these phase and travel time measurements. An approximate error covariance matrix is generated and an optimum choice of survey points is indicated., The combined system, using these selected locations for performing the survey, can yield reference mooring coordinates with error of ±1 meter. Improved precision appears to be limited by inaccuracies in the pulse and Doppler measuring system."],"dc:format.mimetype":["application/pdf"],"dc:identifier.doi":["10.1575/1912/1542"],"dc:identifier.uri":["https://hdl.handle.net/1912/1542"],"dc:language.iso":["en_US"],"dc:publisher":["Massachusetts Institute of Technology and Woods Hole Oceanographic Institution"],"dc:subject":["Underwater navigation","Estimation theory","Regression analysis"],"dc:title":["Analysis of a high resolution deep ocean acoustic navigation system"],"dc:type":["Thesis"]},"updated_at":"2026-07-27T22:05:10Z"}