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 $$B_1$$ $$B_2$$, $$B_3$$, and $$B_4$$ 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. $$u=ca(B_1-B_2)$$, $$v=ca(B_4-B_3)$$, $$w=-b(B_1+B_2+B_3+B_4)$$. In addition to these, an estimate of the error in velocity is computed as $$e=d(B_1+B_2-B_3-B_4)$$. 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 $$d=a/\sqrt{2}$$.

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

## Arguments

x an adp object. 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.

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()