Unified Tidal Analysis and Prediction

Using the ďUTideĒ Matlab Functions


September 2011


  • Designed specifically to handle record times that are irregularly distributed and/or gappy.
  • Suitable for multi-year analyses: accurate nodal/satellite corrections are not limited to record lengths shorter than 1-2 years.
  • Can provide easy-to-use and comprehensive diagnostics to aid the constituent selection process.
  • Handles sea level (amplitude and phase), or currents (current ellipse parameters), with similar syntax.
  • Generates confidence intervals based on spectra (FFT for regular times, Lomb-Scargle for irregular times) of the residuals between the raw input and the harmonic fit.
  • Incorporates the robust L1/L2 solution method to minimize influence of outliers.
  • Enables analysis of groups of time sequences (such as records from an array of instruments, or from a group of model gridpoints) with one m-function call.
  • Builds on, and integrates in to a common framework, the t_tide (Pawlowicz et al 2002), r_t_tide (Leffler and Jay 2009), and "versatile" (Foreman et al 2009) approaches.
  • Flexible interface with mix-and-match choices of analysis configurations accessible by arguments to m-functions.
  • Download the m-files and the technical report / userís manual describing them here: ftp://www.po.gso.uri.edu/pub/downloads/codiga/utide/UTideCurrentVersion.zip


Technical Report / Userís Manual:


Codiga, D.L., 2011. Unified Tidal Analysis and Prediction Using the UTide Matlab Functions. Technical Report 2011-01. Graduate School of Oceanography, University of Rhode Island, Narragansett, RI. 59pp.