Expanding the Performance Envelope of Vertically Profiling Floats
Abstract
Many sampling and surveillance problems in ocean regions of interest require mesoscale-resolving spatial coverage over several seaso,nal cycles. Such coverage can be provided by a large array of autonomous Lagrangian platforms (floats) positioned at selected dept,hs. This approach is based on four cornerstones: (1) platforms with long lifetimes, (2) platforms with low unit cost, (3) platforms,that exploit ocean currents for mobility, and (4) a control system to optimize performance. The array is a mix of vertically-profil,ing float types with complementary measurement capabilities. Types include Argo-style floats with CTD payloads, EM-APEX floats that, measure absolute velocity and a third type, proposed here, that is a hybrid Argo-style float with some horizontal propulsion capabi,lity. The goal is to add useful horizontal mobility to a standard float at incremental cost. The objectives are to design, fabrica,te and test the station-keeping capability of an ALTO float fitted with a new modular external fin module. Testing will culminate in, a series of open ocean deployments to quantify performance. The anticipated outcome of the research is an enhanced capability to ma,intain persistent sensor spatial coverage in ocean regions of interest with an optimized array of diverse float types. Acceptable n,avigation skill will be achieved by a control system that adaptively combines observations, statistical and dynamical models to prod,uce accurate trajectory forecasts. In practice, operational floats may carry a range of payloads (effectors) that improve environm,ental prediction and undersea surveillance. The impact of such never-before-available subsurface infrastructure on DoD capabilities,will be a game-changer for all undersea operations.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Mar 05, 2022
- Source ID
- N000142212033
Entities
People
- Thomas Curtin
Organizations
- Office of Naval Research
- United States Navy
- University of Washington