OTIS - the OSU Tidal Inversion Software

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OTIS (OSU Tidal Inversion Software) implements the efficient representer calculation scheme, which forms the basis for a practical relocatable tidal data inversion package.  OTIS includes software for generating grids, prior model covariances, and boundary conditions; for solving linear shallow water equations by direct factorization; for tidal processing of TOPEX/POSEIDON altimeter data; for solution of the GI problem; and for computation of posterior error bars. Approximate solution methods, based on using a reduced set of representers for the general inversion calculation allow very large data sets to be inverted. With OTIS regional and local tidal inverse problems (with grids containing up to 10e5 nodes) require only a few hours on a common desktop workstation.

The methods implemented in OTIS are described in details by
Egbert, Bennett, and Foreman,1994  and further by Egbert and Erofeeva, 2002
Use menu on the left to access global and regional tidal solutions, obtained with OTIS, OTIS documentation and current version of OTIS.
Research presented here was funded by the National Science Foundation, the Office of Naval Research and the National Aeronautics and Space Administration
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