Topic
iRobot Seaglider
About: iRobot Seaglider is a research topic. Over the lifetime, 176 publications have been published within this topic receiving 3279 citations.
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01 Jan 2014
TL;DR: Communication and localization results obtained in the experimentation of the Thesaurus project and the CMRE (NATO Ctr. Maritime Res. Exp.) cruise CommsNet13 show that the modem-based acoustic localization has the capacity of correcting the navigation drift of low-cost inertial units even at the very low and time-varying communication rates encountered in experimental conditions.
Abstract: Experimental results obtained with the Autonomous Underwater Vehicles developed in the “Thesaurus” project are reported. The Thesaurus AUVs, “Typhoon”, are low-cost torpedo-shaped 300 m depth-rated vehicles implementing a distributed communication and localization scheme based on acoustic modems, one of them with Ultra Short Base Line (USBL) capabilities. Communication and localization results obtained in the experimentation of the Thesaurus project and the CMRE (NATO Ctr. Maritime Res. Exp.) cruise CommsNet13 show that the modem-based acoustic localization has the capacity of correcting the navigation drift of low-cost inertial units even at the very low and time-varying communication rates encountered in experimental conditions.
10 Aug 2009
TL;DR: The use of unmanned vehicle has been highly increasing during the last years, in the Aerospace and Underwater fields, and it is important to conceive and develop techniques to model, optimize and enhance the efficiency of these vehicles.
Abstract: The use of unmanned vehicle has been highly increasing during the last years, in the Aerospace and Underwater fields. There are continuous needs in territory surveillance and protection by use of unmanned vehicles in the Aerospace and Marine fields. For this reason, it is important to conceive and develop techniques to model, optimize and enhance the efficiency of these vehicles. The Unmanned Underwater Vehicle (UUV) may have many applications in the main following fields:
Dissertation•
01 Jun 2015
TL;DR: In this article, the authors used data from 8 Seaglider transects, obtained along the Svinøy section in the Norwegian Sea during a 7-month period between May and December of 2012, to test the applicability of stream-coordinate averaging on the Norwegian Atlantic Front Current, an unstable, meandering, baroclinic frontal jet.
Abstract: Data from 8 Seaglider transects, obtained along the Svinøy section in the Norwegian Sea during a 7-month period between May and December of 2012, have been used to test the applicability of stream-coordinate averaging on the Norwegian Atlantic Front Current, an unstable, meandering, baroclinic frontal jet. Additionally, we have estimated the transport of Atlantic Water in the western branch of the Norwegian Atlantic Current from absolute geostrophic velocity estimates. The Seaglider is an unmanned underwater vehicle, capable of dives down to a depth of 1000 m. It collects hydrographic data, and estimates a depth-averaged current for each dive which allows for an estimate of absolute geostrophic velocity and thus the geostrophic velocity at maximum dive depth. The stream-coordinate average of the Norwegian Atlantic Front Current is narrower and stronger than the corresponding Eularian average, with a current core 40 km wide and with maximum speed exceeding 30 cm/s, bearing a stronger resemblance to the current core observed in individual transects. The Eularian average, in contrast, results in a current more than 80 km wide with a maximum speed of approximately 18 cm/s. Transport estimates from the western branch of the Norwegian Atlantic Current are sparse relative to the eastern branch, and previous estimates based on dynamic calculations from hydrography have been reliant on an assumption of no motion at middepth. Our transport estimates of Atlantic water (de ned as water with salinity greater than 35) in the western branch of the Norwegian Atlantic Current show an average value of 4.7 Sv (1 Sv = 10 m/s). The average contribution of the barotropic component of the transport is 2.6 Sv, which is equal to 54 % of the total transport. A comparison between the estimated current at 1000 m depth, derived from the Seaglider data, and measurements from a moored current-meter has been made in order to verify the validity of our currentand transport estimates.
01 Jan 2014
TL;DR: The IVER2 AUV which configuration by Taiwan Ocean Research Institute and built by OceanServer is discussed, performs routine operations sea surface; all the components are rated to 100 m.
Abstract: In the recent decades, Autonomous Underwater Vehicles (AUVs) are remarkable machines that revolutionized the process of gathering ocean data. AUV systems have been developed, operated, marketed, produced, sold and utilized in water for various purposes. Accordingly, in this study, the IVER2 AUV which configuration by Taiwan Ocean Research Institute (TORI) and built by OceanServer is discussed. The IVER2 performs routine operations sea surface; all the components are rated to 100 m.