beamToXyzAdpAD2CP: Convert AD2CP-style adp data From Beam to XYZ Coordinates

In oce: Analysis of Oceanographic Data

Description

This looks at all the items in the data slot of x, to see if they contain an array named v that holds velocity. If that velocity has 4 components, and if oceCoordinate for the item is "beam", then along-beam velocity components B1 B1, B3, and B4 are converted to instrument-oriented Cartesian velocity components u v and w using the convex-geometry formulae from section 5.5 of reference 1, viz. u=a*(B1-B2), v=a*(B4-B3), w=-b*(B1+B2+B3+B4). In addition to these, an estimate of the error in velocity is computed as e=d*(B1+B2-B3-B4). The geometrical factors in these formulae are: a=1/(2*sin(theta)) where theta is the angle the beams make to the axial direction (which is available as x[["beamAngle"]]), b=1/(4*cos(theta)), and d=a/sqrt(2).

Usage

beamToXyzAdpAD2CP(x, debug = getOption("oceDebug"))

Arguments

x

an adp object.

debug

an integer specifying whether debugging information is to be printed during the processing. This is a general parameter that is used by many oce functions. Generally, setting debug=0 turns off the printing, while higher values suggest that more information be printed. If one function calls another, it usually reduces the value of debug first, so that a user can often obtain deeper debugging by specifying higher debug values.

References

1. Teledyne RD Instruments. “ADCP Coordinate Transformation: Formulas and Calculations,” January 2010. P/N 951-6079-00.

See Also

Other things related to adp data: [[,adp-method, [[<-,adp-method, ad2cpHeaderValue(), adp-class, adpEnsembleAverage(), adp_rdi.000, adp, as.adp(), beamName(), beamToXyzAdp(), beamToXyzAdv(), beamToXyz(), beamUnspreadAdp(), binmapAdp(), enuToOtherAdp(), enuToOther(), handleFlags,adp-method, is.ad2cp(), plot,adp-method, read.adp.ad2cp(), read.adp.nortek(), read.adp.rdi(), read.adp.sontek.serial(), read.adp.sontek(), read.adp(), read.aquadoppHR(), read.aquadoppProfiler(), read.aquadopp(), rotateAboutZ(), setFlags,adp-method, subset,adp-method, subtractBottomVelocity(), summary,adp-method, toEnuAdp(), toEnu(), velocityStatistics(), xyzToEnuAdpAD2CP(), xyzToEnuAdp(), xyzToEnu()

oce documentation built on March 28, 2021, 9:09 a.m.