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iRobot Seaglider

About: iRobot Seaglider is a(n) research topic. Over the lifetime, 176 publication(s) have been published within this topic receiving 3279 citation(s).

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Journal ArticleDOI
Abstract: Seagliders are small, reusable autonomous underwater vehicles designed to glide from the ocean surface to a programmed depth and back while measuring temperature, salinity, depth-averaged current, and other quantities along a sawtooth trajectory through the water. Their low hydrodynamic drag and wide pitch control range allow glide slopes in the range 0.2 to 3. They are designed for missions in a range of several thousand kilometers and durations of many months. Seagliders are commanded remotely and report their measurements in near real time via wireless telemetry. The development and operation of Seagliders and the results of field trials in Puget Sound are reported.

860 citations

Journal ArticleDOI
Abstract: Underwater gliders are autonomous vehicles that profile vertically by buoyancy control and move horizontally on wings. Gliders are reviewed, from their conception by Stommel as an extension of autonomous profiling floats, through their development in 3 models, and including their first deployments singly and in numbers. This paper discusses the basics of glider function as implemented by University of Washington, Seaglider, Scripps Institution of Oceanography, and Webb Research in Slocum. Preliminary results are presented from a recent demonstration project that used a network of gliders off Monterey. A wide range of sensors has already been deployed on gliders, with many under development, and a wider range of future possibilities. Glider networks appear to be among the best approaches to achieving subsurface spatial resolution necessary for ocean research.

599 citations

Book ChapterDOI
28 Nov 2002
Abstract: A class of small (50 kg, 2 m length), reusable autonomous underwater vehicles capable of operating at speeds cm/s with ranges several thousand kilometers and durations of months has been developed and tested. The vehicles, autonomous profiling floats with wings, execute sawtooth patterns between the surface, where they are located and com to shore, and depths of O(1000 m). These vehicles are commanded remotely and report results to shore in near real tim ent approaches to the various design issues are embodied in the vehicles Spray, Seaglider and Slocum models desc including batteryand thermal-powered propulsion, different depth and speed capabilities, diverse hydrodynamic appro reducing drag and gliding control, various communication schemes, and a range of sensors. These approaches are des examples of completed scientific missions are given. l., e st els. h ic es rs s, ing ult g, em cg on the ive is cles an be an eing ean urand the lidin

237 citations

Journal ArticleDOI

111 citations

Journal ArticleDOI
Abstract: From September 2003 to December 2007, autonomous, underwater Seaglider continuously ran a V-shaped transect off Washington State from about 200-m water depth (i.e., at the break between the shelf and slope) to offshore waters with depths >2700 m. Seaglider visited the offshore vertex at 47°N, 128°W, where our observations concentrated, approximately monthly. Seaglider measured temperature, conductivity, and dissolved oxygen to 1000 m and also recorded chlorophyll a (Chl a) fluorescence and particulate optical backscatter to 150 m. Distinct interannual variation was documented in timing and depths of winter mixing, transition to a shallow summer pycnocline, and onset of mixed-layer erosion in autumn. Chl a concentrations estimated from fluorescence were directly comparable among the seven laboratory-calibrated sensors used, but their estimates exceeded concurrent, satellite-derived concentrations by a factor of three. Seaglider optical profiles enabled interpretation of satellite imagery by revealing that the apparent autumn bloom after destratification was instead a vertical redistribution of phytoplankton from the subsurface maximum to a depth where they could be observed by satellites. Results of 4 yr of sampling within 25 km of the vertex demonstrate the value of gliders in ocean observing and their capability to carry out multiyear, fully autonomous operations under any sea state. The true power of glider programs will be realized in combination with other measurement platforms, including larger spatial coverage by satellites and more comprehensive biogeochemical measurements from moorings and occasional ship-based sampling.

90 citations

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