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 betwee constituent and its comparison, used in the Rayleigh criterion

  `d1`

    first Doodson number

  `d2`

    second Doodson number

  `d3`

    third Doodson number

  `d4`

    fourth Doodson number

  `d5`

    fifth Doodson number

  `d6`

    sixth Doodson number

  `semi`

    (fill in some info later)

  `nsat`

    number of satellite constituents

  `ishallow`

    (fill in some info later)

  `nshallow`

    (fill in some info later)

  `doodsonamp`

    (fill in some info later)

  `doodsonspecies`

    (fill in some info later)

`sat`

  a list containing vectors

  `deldood`

    (fill in some info later)

  `phcorr`

    (fill in some info later)

  `amprat`

    (fill in some info later)

  `ilatfac`

    (fill in some info later)

  `iconst`

    (fill in some info later)

`shallow`

  a list containing vectors

  `iconst`

    (fill in some info later)

  `coef`

    (fill in some info later)

  `iname`

    (fill in some info later)

Apart from the use of `d1` through `d6`, the naming and content follows `T_TIDE`. All of this is based on Foreman (1977), to which the reader is referred for details.

### Usage

    data(tidedata)

### 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

`tidem` uses this dataset to establish its harmonic constituents.

[Package oce version 0.9-18 Index]