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"))
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.
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
,
ad2cpCodeToName()
,
ad2cpHeaderValue()
,
adp
,
adp-class
,
adpAd2cpFileTrim()
,
adpConvertRawToNumeric()
,
adpEnsembleAverage()
,
adpFlagPastBoundary()
,
adpRdiFileTrim()
,
adp_rdi.000
,
applyMagneticDeclination,adp-method
,
as.adp()
,
beamName()
,
beamToXyz()
,
beamToXyzAdp()
,
beamToXyzAdv()
,
beamUnspreadAdp()
,
binmapAdp()
,
enuToOther()
,
enuToOtherAdp()
,
handleFlags,adp-method
,
is.ad2cp()
,
plot,adp-method
,
read.adp()
,
read.adp.ad2cp()
,
read.adp.nortek()
,
read.adp.rdi()
,
read.adp.sontek()
,
read.adp.sontek.serial()
,
read.aquadopp()
,
read.aquadoppHR()
,
read.aquadoppProfiler()
,
rotateAboutZ()
,
setFlags,adp-method
,
subset,adp-method
,
subtractBottomVelocity()
,
summary,adp-method
,
toEnu()
,
toEnuAdp()
,
velocityStatistics()
,
xyzToEnu()
,
xyzToEnuAdp()
,
xyzToEnuAdpAD2CP()