Now showing items 1-20 of 29

    • 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 ...
    • Application of model studies for quality control of bottom pressure based GLOSS sea level gauge at Takoradi Harbour (Ghana, West Africa) 

      Joseph, A.; Mehra, P.; Desai, R.G.P.; Dotse, J.; Odammetey, J.T.; Nkebi, E.K.; Vijaykumar, K.; Prabhudesai, S.P. (Allied, India, 2005)
      Quality-control of bottom pressure based sea level gauge has been effected using a statistically derived simple linear model constructed from a set of bottom pressures and concurrent tide-staff measurements. The study ...
    • Augmented coral reef monitoring using a stationary reef monitoring system 

      Maurya, P.; Manikandan, B.; Raj, Ranith; Naik, Lakshadeep; Fernandes, Llewellyn; Dabholkar, N.; Prabhudesai, S.P.; Ravindran, J.; Agarwadekar, Y.; Navelkar, G.S. (Elsevier, 2023)
      Coral reef monitoring is a reliable tool to assess the effect of climate change as corals are sensitive to increases in water temperatures between 30 �C and 35 �C resulting in bleaching - a whitening process when the corals ...
    • 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 ...
    • 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 ...
    • Endurance and stability of some surface meteorological sensors under land- and ship-based operating environments 

      Mehra, P.; Desai, R.G.P.; Joseph, A.; Vijaykumar, K.; Dabholkar, N.; Prabhudesai, S.P.; Nagvekar, S.; Agarvadekar, Y. (Allied, India, 2005)
      The endurance and stability of some surface meteorological sensors under land- and ship-based operating environments is described. The sensors evaluated are those for measurement of relative humidity, barometric pressure ...
    • 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 ...
    • Installation and operation manual on sea level gauge (Model: NIO_Ghana_2004) 

      Joseph, A.; Pereira, A.; Vijaykumar, K.; Prabhudesai, S.P.; Methar, A.; Dias, M. (National Institute of Oceanography, India, 2004)
      NIO sea level gauge is a pressure-based gauge that operates on 12 volts battery. The pressure-sensing element used in this gauge is a piezo-resistive programmable semiconductor transducer that provides pressure samples in ...
    • 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 ...
    • Performance evaluation of Honeywell silicon piezoresistive pressure transducers for oceanographic and limnological measurements 

      Vijaykumar, K.; Joseph, A.; Desai, R.G.P.; Prabhudesai, S.P.; Nagvekar, S.; Damodaran, V. (American Meteorological Society, 2005)
      Simultaneous calibrations of three temperature-compensated piezoresistive ruggedized precision 'absolute' pressure transducers (Honeywell model PPTR0040AP5VB-BD), which have been designed specially for long-term coastal ...
    • Performance of Honeywell silicon pressure transducers 

      Vijaykumar, K.; Joseph, A.; Desai, R.G.P.; Nagvekar, S.; Prabhudesai, S.P.; Damodaran, V. (Allied, India, 2003)
      Simultaneous calibration of three Honeywell pressure transducers (PPTR) at four ambient temperatures have been carried out using a novel static calibration system developed in-house. Calibration results indicated that ...