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.

To get a list of all the available tidal constituents, do

cat("all constituents:",tidedata$const$name)
and to get a list of the so-called standard coefficients, do
cat("standard constituents:",tidedata$const$name[tidedata$const$ikmpr])

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 is used to fit tidal models using tidedata.


[Package oce version 0.1-76 Index]