Some local tidal solutions were obtained with OTIS. Various altimetric (Topex Poseidon, Topex Tandem, ERS, GFO) and other sets of data  (i.e. tide gauges, ship born ADCP) were assimilated.  The TPXO global solutions have about the same residual magnitudes as the regional inverse solutions for the open ocean, but the regional inverse solutions generally fit the data  significantly better for complex topographic areas and in shallow water. Both tidal elevations and transports  are provided for all regional solutions*. Our tide models are referenced to mean sea level. Currents are derived from transports by dividing by water depth.

To extract tidal harmonic constants and/or predict tide using a regional tidal solution you MUST first download OTPS (OSU Tidal Prediction Software) or OTPSnc (same as OTPS, but for our models in netcdf format). OTPS(nc) is written in Fortran 90 and tested under UNIX/Linux. The compressed and tarred OTPS(nc) packages contain README files with details on tidal solution installation and usage. There also exist a MATLAB toolbox, created in cooperation with  Laurie Padman (ESR), called Tidal Model Driver (TMD), functionally the same as OTPS. The TMD toolbox also includes a friendly graphical user interface. Use menu on the left to download TMD and/or Antarctic Tidal Models.