NDLI: A Portable System For Ocean Bottom Imaging and Charting

Content Provider	IEEE Xplore Digital Library
Author	Kosalos, J. Chayes, D.
Copyright Year	1983
Description	Author affiliation: International Submarine Technology, Ltd., Redmond, WA, USA (Kosalos, J.)
Abstract	The Sea Mapping and Remote Characterization (Sea MARC) system is a sophisticated means of data acquisition in support of geophysical, acoustic, oceanographic, and hydrographic activities in all water depths. Typical real-time Sea MARC outputs can include ocean floor bathymetry, slant range corrected side-scan images, and sub-bottom profiles; these can be made at survey rates up to 10 square miles per hour. In addition to real-time displays, the Sea MARC data (along with ship's data and navigation information) are recorded on magnetic tape for later processing at on-shore computer facilities. Designed to be highly modular and flexible in configuration, the Sea MARC system comprises four primary sub-systems: an instrumented towfish, a telemetry and towing cable, a self-powered shipboard handling system and an on-deck data processing center. The system can be readily adapted to meet the data acquisition needs of a wide range of applications, from physical oceanography and marine geophysics to pipeline route surveys, drilling lease site investigations, and ocean mineral deposit characterization. During the past two years, while engaged by commercial, governmental, and academic agencies, one Sea MARC system has successfully imaged more than 10,000 square miles of ocean floor, including: the Mississippi and Laurentian fans, deepwater fracture zones, polymetallic sulfide deposits on the Juan de Fuca Ridge, and the continental margins of the U.S. and Canadian east coast. The use of a portable system for data acquisition as just described provides a cost effectiveness that cannot be matched by large, special purpose ships. As the outfitting and operating costs of these ships continues to escalate, systems such as the Sea MARC will perform an increasing portion of the offshore ocean survey activities that previously were the exclusive realm of large, dedicated oceanographic vessels.
Starting Page	649
Ending Page	656
File Size	946953
Page Count	8
File Format	PDF
DOI	10.1109/OCEANS.1983.1152069
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1983-08-29
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Optical attenuators Oceans Electromagnetic radiation Military satellites Earth Laser radar Optical sensors Spaceborne radar Image resolution Costs
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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