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Ghatkar, Siddharth
- Technology Demonstration of a Novel Seabed Resident Event-Driven Profiling System
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PDF Views:124
Authors
Antonio Mascarenhas
1,
Nitin Dabholkar
1,
Jayu Narvekar
1,
Shivanand Prabhudesai
1,
Siddharth Ghatkar
1,
Sadaf Ansari
1,
Pramod Maurya
1,
Elgar Desa
1,
Anand Lokapure
1,
Surekha Nagvekar
1,
Gajanan Navelkar
1,
R. Madhan
1,
Fernando Vijayan
1,
Vidish Shetye
1,
Llewellyn Fernandes
1,
Sanjeev Afzulpurkar
1,
T. Suresh
1
Affiliations
1 National Institute of Oceanography, Dona Paula, Goa 403 004, IN
1 National Institute of Oceanography, Dona Paula, Goa 403 004, IN
Source
Current Science, Vol 120, No 4 (2021), Pagination: 622-627Abstract
The seabed resident event-driven profiling system (SREP) was deployed in the northeastern Arabian Sea for winter convention studies. SREP is an autonomous profiling system consisting of two parts: a stationary seabed unit and a positively buoyant tethered profiling unit (profiler). It offers a novel and optimized approach to profiling in coastal waters from close to seabed (14.63 m above seabed) to the sea surface. The seabed unit houses an underwater winch system, underwater acoustic modem, pressure sensor, low-power electronics, batteries and divinylcell hydraulic crush point foam for subsea applications. The profiler houses a suite of oceanographic sensors: conductivity– temperature–depth, DO, chlorophyll, PAR, underwater acoustic modem, low-power electronics, batteries and divinylcell hydraulic crush point foam for subsea applications. The underwater winch system on the seabed unit spools out and spools in the profiler throughout the water column. Data acquisition on the profiler is done during ascending. The profiler ascends gradually in the water column at an average velocity of 20 cm/s. The seabed unit and the profiling unit communicate using a pair of underwater acoustic modems operating at 18–34 kHz. SREP was developed to obtain time-series water column measurements of coastal waters during the summer monsoon season (June–September) when the sea wave and wind conditions are extreme, thus making it difficult to deploy profiling packages from the ship. A description of SREP and observations made during the field deployment are presented in this article.Keywords
Coastal Waters, Profiling System, Seabed Unit, Technology Demonstration, Winter Convention Studies.Full Text
References
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