Estimate atmospheric pressure in an rsk object. Pressures must be in
decibars for this to work. First, a subset of pressures is created, in which
the range is
sap=10.1325 dbar is standard
sealevel atmospheric pressure. Within this window, three measures of central
tendency are calculated: the median, the mean, and a weighted mean that has
weight given by
rskPatm(x, dp = 0.5)
an rsk object.
Half-width of pressure window to be examined (in decibars).
A list of four estimates:
sap, the median, the mean, and the weighted mean.
The documentation for rsk explains the structure of
rsk objects, and also outlines the other functions dealing with them.