beamToXyzAdpAD2CP | R Documentation |
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).
beamToXyzAdpAD2CP(x, debug = getOption("oceDebug"))
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 |
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
,
adpConvertRawToNumeric()
,
adpEnsembleAverage()
,
adpFlagPastBoundary()
,
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()
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