This file format, described at https://www.aoml.noaa.gov/phod/dhos/axbt.php, contains a header
line, followed by data lines. For example, a particular file at this site has first
three lines as follows.
181.589 20100709 140820 -85.336 25.290 N42RF GL10 14 2010-190-15:49:18
-0.0 27.52 -9.99
-1.5 27.52 -9.99where the items on the header line are (1) a year-day (ignored here), (2)
YYYYMMDD, (3) HHMMSS, (4) longitude, (5) latitude, (6) aircraft wing
number, (7) project name, (8) AXBT channel and (9) AXBT ID. The other lines hold vertical
coordinate in metres, temperature and temperature error; -9.99 is a missing-value
code. (This formatting information is extracted from a file named readme.axbt that
is provided with the data.)
Usage
read.xbt.noaa1(
file,
debug = getOption("oceDebug"),
missingValue = -9.99,
encoding = "latin1",
processingLog
)Arguments
- file
character value naming a file, or a file connection, containing the data.
- debug
a flag that turns on debugging. The value indicates the depth within the call stack to which debugging applies.
- missingValue
numerical value that is to be interpreted as
NA- encoding
a character value that indicates the encoding to be used for this data file, if it is textual. The default value for most functions is
"latin1", which seems to be suitable for files containing text written in English and French.- processingLog
if provided, the action item to be stored in the log. This parameter is typically only provided for internal calls; the default that it provides is better for normal calls by a user.
Value
An xbt object.
See also
Other things related to xbt data:
[[,xbt-method,
[[<-,xbt-method,
as.xbt(),
plot,xbt-method,
read.xbt(),
subset,xbt-method,
summary,xbt-method,
xbt,
xbt-class,
xbt.edf,
xbt2.edf