get.sst.from.server {kfsst} | R Documentation |
This function allows easy access to a fairly coarse SST database that has been setup for this purpose. Data is downloaded from within R and stored in a format ready to be post-processed.
get.sst.from.server(track, folder = tempdir(), server = "http://atlas.nmfs.hawaii.edu/cgi-bin/reynolds_extract.py")
track |
A single data.frame containing a track or a
list of data.frame s each containing a
track. The idea is that the function should only
download the SST-data spanning the region and period
of the tracks that needs to be analyzed. |
folder |
Is where the downloaded raw data files are stored. This defaults to a temporary directory. |
server |
Presently three servers are available. The default is
the fairly coarse Reynold's one 1x1-degree 8-day
composites. This source is fast to download, but may
be too coarse in some areas. The two other servers are
the AVHRR-GAC 3-day and AVHRR-GAC 8-day composites
these have a 0.1x0.1-degree resolution. The server names
are:
http://atlas.nmfs.hawaii.edu/cgi-bin/gac3day_extract.py
and http://atlas.nmfs.hawaii.edu/cgi-bin/gac8day_extract.py |
The servers has been set up to extract SST-fields that covers a track (or a set of tracks) in simple way from within R. To use the default source type a command similar to:
sst.path <- get.sst.from.server(track1)
Notice 'track1' can be replaced by a list of tracks like:
sst.path <- get.sst.from.server(list(track1, track2))
to obtain an SST-field covering a set of tracks.
To use one of the two other servers simply supply the server name as in:
sst.path <- get.sst.from.server(list(track1, track2), server='http://atlas.nmfs.hawaii.edu/cgi-bin/gac3day_extract.py')
or
sst.path <- get.sst.from.server(list(track1, track2), server='http://atlas.nmfs.hawaii.edu/cgi-bin/gac8day_extract.py')
To use a user supplied SST-source please see documentation
for the function write.sst.field
.
The path returned from the function is where all the raw SST files are saved.
Anders Nielsen anielsen@dina.kvl.dk, Russell Moffitt Russell.Moffitt@noaa.gov
TALK TO RUSS
# No example supplied here, but check out the example # in the blue.shark dataset documentation