A new ctd
object is assembled from the contents of the rsk
object.
The data and metadata are mostly unchanged, with an important exception: the
pressure
item in the data
slot may altered, because rsk
instruments measure total pressure, not sea pressure; see “Details”.
rsk2ctd(
x,
pressureAtmospheric = 0,
longitude = NULL,
latitude = NULL,
ship = NULL,
cruise = NULL,
station = NULL,
deploymentType = NULL,
debug = getOption("oceDebug")
)
an rsk object.
A numerical value (a constant or a vector),
that is subtracted from the pressure in object
before storing it in the return value.
numerical value of longitude, in degrees East.
numerical value of latitude, in degrees North.
optional string containing the ship from which the observations were made.
optional string containing a cruise identifier.
optional string containing a station identifier.
character string indicating the type of deployment (see
as.ctd()
).
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.
The pressureType
element of the
metadata
of rsk
objects defines the pressure type, and this controls
how pressure is set up in the returned object. If object@metadata$pressureType
is "absolute"
(or NULL
) then the resultant pressure will be adjusted
to make it into "sea"
pressure. To do this, the value of
object@metadata$pressureAtmospheric
is inspected. If this is present, then
it is subtracted from pressure
. If this is missing, then
standard pressure (10.1325 dbar) will be subtracted. At this stage, the
pressure should be near zero at the ocean surface, but some additional adjustment
might be necessary, and this may be indicated by setting the argument pressureAtmospheric
to
a non-zero value to be subtracted from pressure.