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Found 3 essays matching the above criteria.

  1. 1. Analytic comparison of multibeam echo soundings

    University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

    Author : Terje Ole Slinning; [2016]
    Keywords : multibeam echo system; geography; GIS; bathymetry and seafloor; hysical geography and ecosystem science; Earth and Environmental Sciences;

    Abstract : This study makes a numeric and visual comparison of two different multibeam echo sounding (MBES) surveys performed at the exact same location, in an effort to establish how reliable and comparable the vertical depth measurements are. The horizontal position uncertainty is not issued in this study. READ MORE

  3. 2. Water Depth Estimation Using Ultrasound Pulses for Handheld Diving Equipment

    University essay from Linköpings universitet/Institutionen för systemteknik; Linköpings universitet/Tekniska högskolan

    Author : Katarina Mollén; [2015]
    Keywords : Depth sounding; Echo sounding; Underwater ultrasounding; Time of flight estimation; Time delay estimation; Matched filter; Cross correlation; GCC; PHAT; ML;

    Abstract : This thesis studies the design and implementation of an ultra-sonic water depth sounder. The depth sounder is implemented in a hand-held smart console used by divers. READ MORE

  4. 3. Störs laxens lekvandring i en kraftverkspåverkad älvsträcka?

    University essay from SLU/Dept. Of Aquatic Resources

    Author : Johan Lundgren; [2006]
    Keywords : lax; lekvandring; flödesförändringar; torrfåran; radiomärkta; pejling;

    Abstract : The upstream spawning migration of Atlantic salmon (Salmo salar) at the confluence area between the power-station outlet and the bypass-channel in river Umeälven (flow 430 m3s-1) was compared in 2004 and 2005, two years with different experimental flow-regimes. In 2004 the water flow in the bypass-channel was altered during the day with increased flows during the nights while the water flow in 2005 mainly was altered between the weekdays and weekends. READ MORE