Now showing items 1-20 of 28

    • A geological and geophysical data collection system 

      Sudhakar, T.; Afzulpurkar, S. (CUSAT, Kochi, 1992)
      A geological and geophysical data collection system using a Personal Computer is described below. The system stores data obtained from various survey systems typically installed in a charter vessel and can be used for ...
    • A geological data logger 

      Desai, R.G.P.; DeSa, E.J.; Desa, E.S.; Afzulpurkar, S. (IEEE Oceanic Engineering Society, 1986)
      A novel data logger has been designed and tested for logging data from a satellite navigator, magnetometer, and a deep-sea echosounder. The logger exploits the interrupt structure of an in-house 8085 single-board computer ...
    • A multi-sensor autonomous platform for fast ocean observation studies 

      Afzulpurkar, S.; Navelkar, G.S.; Desa, E.; Madhan, R.; Dabholkar, N.A.; Prabhudesai, S.P.; Mascarenhas, A.A.M.Q.; Maurya, P. (Indian National Centre for Ocean Information Services (INCOIS), 2012)
      A new platform Autonomous Vertical Profiler (AVP) has been developed at CSIR - National Institute of Oceanography in Goa, India that can rapidly and autonomously collect repetitive data to 200m water depth. It is equipped ...
    • A small autonomous surface vehicle for ocean color remote sensing 

      Desa, E.S.; Maurya, P.; Pereira, A.; Pascoal, A.M.; Desai, R.G.P.; Mascarenhas, A.A.M.Q.; Desa, E.; Madhan, R.; Matondkar, S.G.P.; Navelkar, G.S.; Prabhudesai, S.P.; Afzulpurkar, S. (IEEE, 2007)
      This paper provides a study on the development and the use of a small autonomous surface vehicle (ASV) that automatically follows programmed mission transects, while measuring sensor outputs along the tracks. It discusses ...
    • Acoustic communication for Maya Autonomous Underwater Vehicle - performance evaluation of acoustic modem 

      Afzulpurkar, S.; Maurya, P.; Navelkar, G.S.; Desa, E.S.; Mascarenhas, A.A.M.Q.; Dabholkar, N.A.; Madhan, R.; Prabhudesai, S.P. (NIOT, Chennai, 2015)
      Autonomous underwater vehicles (AUV) traverse considerable distances underwater without any intervention. Very often the operations are in coastal waters with small depth, large horizontal distances, seabed obstacles, ...
    • An autonomous underwater vehicle "Maya", for monitoring coastal waters, estuaries, rivers and dams 

      Mascarenhas, A.A.M.Q.; Navelkar, G.S.; Madhan, R.; Dabholkar, N.A.; Prabhudesai, S.P.; Maurya, P.; Desa, E.; Afzulpurkar, S.; Suresh, T.; Matondkar, S.G.P.; Mahalunkar, A. (Indian National Centre for Ocean Information Services (INCOIS), 2012)
      This article demonstrates the use of Maya, Autonomous Underwater Vehicle (AUV) for monitoring coastal waters, estuaries, rivers and dams. Maya is a mono hull structure with detachable nose and tail cones. The nose cone is ...
    • An Integrated Approach to Study Mud Banks of Alleppey Kerala using the Autonomous Vertical Profiler (AVP) 

      Mascarenhas, A.A.M.Q.; Afzulpurkar, S.; Navelkar, G.S.; Madhan, R.; Maurya, P.; Desa, E.S.; Prabhudesai, S.P.; Dabholkar, N.A.; Lamani, V.; Manoharan, V.; Naik, N.; Thottam, T.J.; DineshKumar, P.K.; deAraujo, B.A. (NIOT, Chennai, 2015)
      Mud Banks of Kerala are areas of the sea adjoining the coast that have a special property of dampening the waves and creating clearly demarcated areas of calm water during the roughest monsoon conditions of the sea. It is ...
    • Autonomous profiling device to monitor remote water bodies 

      Madhan, R.; Dabholkar, N.A.; Navelkar, G.S.; Desa, E.; Afzulpurkar, S.; Mascarenhas, A.A.M.Q.; Prabhudesai, S.P. (Current Science Association, 2012)
      In tropical climates, most freshwater reservoirs, dams and lakes are prone to annual summer stratification during which bottom water layers near the bed become hypoxic (<2 ml/l) with very low concentrations of dissolved ...
    • Autonomous vertical profiler data management 

      Afzulpurkar, S.; Navelkar, G.S.; Desa, E.S.; Madhan, R.; Dabholkar, N.; Prabhudesai, S.P.; Mascarenhas, A.A.M.Q. (Springer, 2010)
      The Autonomous Vertical Profiler (AVP), developed at NIO [1] [2], collects position and water column data over a period of 3 days and transmits through a satellite modem which is collated and stored on a PC. Data includes ...
    • Challenges in marine instrumentation 

      Afzulpurkar, S.; Desa, E.; Joseph, A.; Chakraborty, B.; Nayak, M.R.; Ranade, G. (Cent. for Earth Sci. Stud., Cochin (India), 1997)
      The problems of ocean science are technology intensive as the area to be surveyed is vast, complex and hostile. The accessibility of most of the areas too, puts severe constraints on the design methodology, specially the ...
    • Control of the Maya AUV in the vertical and horizontal planes: Theory and practical results 

      Maurya, P.; Desa, E.; Pascoal, A.; Barros, E.; Navelkar, G.S.; Madhan, R.; Mascarenhas, A.A.M.Q.; Prabhudesai, S.P.; Afzulpurkar, S.; Gouveia, Ashwin; Naroji, S.; Sebastiao, l. (Institute for Systems and Robotics, 2007)
      The paper describes the design and testing of the depth and heading autopilots for a small Autonomous Underwater Vehicle (AUV) named Maya. Control system design is done using the LQ (Linear-Quadratic) optimization technique ...
    • Design and development of pressure sensor based on Fiber Bragg Grating (FBG) for ocean applications 

      Vaddadi, V.S.C.S.; Parne, S.R.; Afzulpurkar, S.; Prabhudesai, S.P.; Vijeesh, V.P. (EDP Sciences, 2020)
      Reactively evaporated TiO2 thin films were deposited on the glass substrate by electron beam heating technique. In the first stage evaporation rates are varied keeping substrate temperature fixed at 200 C and oxygen flow ...
    • Development of an autonomous vertical profiler for oceanographic studies 

      Dabholkar, N.; Desa, E.; Afzulpurkar, S.; Madhan, R.; Mascarenhas, A.A.M.Q.; Navelkar, G.S.; Maurya, P.; Prabhudesai, S.P.; Nagvekar, S.; Martins, H.; Sawkar, G.; Fernandes, P.; Manoj, K.K. (Allied, 2007)
      The variations in oceanic variables that influence global climate, hypoxia in freshwater reservoirs and in coastal waters as in the west coast of India, the rise of harmful algal blooms are amongst current problems that ...
    • Exploration of the Carlsberg Rodge 

      Mudholkar, A.; KameshRaju, K.A.; Kodagali, V.N.; Afzulpurkar, S.; Ambre, N.V. (International Cooperation of Ridge-Crest Studies, 2000)
    • Field evaluation of navigational sensors using DGPS/GPS for a small AUV 

      Mehra, P.; Desai, R.G.P.; Mascarenhas, A.A.M.Q.; Sukerkar, A.; Desa, E.S.; Navelkar, G.S.; Madhan, R.; Desa, E.; Prabhudesai, S.P.; Afzulpurkar, S.; Chakraborty, B.; Maurya, P. (Allied, India, 2003)
      This paper presents the preliminary results of a field experiment for low-cost strap down IMU/GPS combination for the estimation of 2-D components of vehicle position (Trajectory). In present approach the effects of earth ...
    • In situ profiling of eastern Arabian Sea coastal waters using a new autonomous vertical profiler 

      Desa, E.S.; Madhan, R.; Dabholkar, N.A.; Prabhudesai, S.P.; Navelkar, G.S.; Mascarenhas, A.A.M.Q.; Afzulpurkar, S.; Phaldesai, M.; Maurya, P. (IEEE, 2013)
      The autonomous vertical profiler (AVP) presented here offers a fast, cost-effective, optimized approach to profiling in coastal waters. It consists of a hands-free, slightly buoyant, motor-driven in situ robot profiler ...
    • Integrated multi purpose underwater station 

      Afzulpurkar, S. (Cochin University of Science and Technology, Kochi, 1995)
    • Mechanical design and development aspects of a small AUV - Maya 

      Madhan, R.; Desa, E.S.; Prabhudesai, S.P.; Sebastiao, L.; Pascoal, A.; Desa, E.; Mascarenhas, A.A.M.Q.; Maurya, P.; Navelkar, G.S.; Afzulpurkar, S.; Khalap, S. (Institute for Systems and Robotics, 2007)
      This paper contains a description of the mechanical design route that was adopted in building a small AUV (Autonomous Underwater Vehicle). At the outset, it is decided to follow a set of guidelines that defined a broad set ...
    • Miniature sonar for obstacle detection on samll AUV Maya 

      Afzulpurkar, S.; Desa, E.; Navelkar, G.S.; Mascarenhas, A.A.M.Q.; Maurya, P.; Martins, H.; Madhan, R.; Prabhudesai, S.P.; Pinto, R.; Marchon, N. (Allied, 2007)
      Autonomous platforms are increasingly able to collect in-situ data with least disturbance to the parameters under measurements. To attain high level of autonomy they need to posses capabilities to detect and avoid obstacles ...
    • Platform attitude data acquisition system 

      Afzulpurkar, S. (SYMPOL, 2001)
      A system for automatic acquisition of underwater platform attitude data has been designed, developed and tested in the laboratory. This is a micro controller based system interfacing dual axis inclinometer, high-resolution ...