tidedata {oce} | R Documentation

## Tidal Constituent Information

### Description

The `tidedata` dataset contains Tide-constituent information that is use by `tidem` to fit tidal models. `tidedata` is a list containing

`const`

  a list containing vectors `name` (a string with constituent name), `freq` (the frequency, in cycles per hour), `kmpr` (a string naming the comparison constituent, blank if there is none), `ikmpr` (index of comparison constituent, or `0` if there is none), `df` (frequency difference between constituent and its comparison, used in the Rayleigh criterion), `d1` through `d6` (the first through sixth Doodson numbers), `semi`, `nsat` (number of satellite constituents), `ishallow`, `nshallow`, `doodsonamp`, and `doodsonspecies`.

`sat`

  a list containing vectors `deldood`, `phcorr`, `amprat`, `ilatfac`, and `iconst`.

`shallow`

  a list containing vectors `iconst`, `coef`, and `iname`.

Apart from the use of `d1` through `d6`, the naming and content follows `T_TIDE` (see Pawlowicz et al. 2002), which in turn builds upon the analysis of Foreman (1977).

### Author(s)

Dan Kelley

### Source

The data come from the `tide3.dat` file of the `T_TIDE` package (Pawlowicz et al., 2002), and derive from Appendices provided by Foreman (1977). The data are scanned using ‘tests/tide.R’ in this package, which also performs some tests using `T_TIDE` values as a reference.

### References

Foreman, M. G. G., 1977. Manual for tidal heights analysis and prediction. Pacific Marine Science Report 77-10, Institute of Ocean Sciences, Patricia Bay, Sidney, BC, 58pp.

Pawlowicz, Rich, Bob Beardsley, and Steve Lentz, 2002. Classical tidal harmonic analysis including error estimates in MATLAB using `T_TIDE`. Computers and Geosciences, 28, 929-937.

### See Also

Other things related to `tidem` data: `[[,tidem-method`, `[[<-,tidem-method`, `plot,tidem-method`, `predict.tidem`, `summary,tidem-method`, `tidem-class`, `tidemAstron`, `tidemVuf`, `tidem`

[Package oce version 0.9-22 Index]