gsw_grav | R Documentation |
Gravitational Acceleration
gsw_grav(latitude, p = 0)
latitude |
latitude in decimal degrees, positive to the north of the equator. (This
is called |
p |
sea pressure [dbar], i.e. absolute pressure [dbar] minus 10.1325 dbar |
gravitational acceleration [ m/s^2 ]
This R function uses a wrapper to a C function contained within the GSW-C system as updated 2022-10-11 at https://github.com/TEOS-10/GSW-C with git commit '657216dd4f5ea079b5f0e021a4163e2d26893371'.
The C function uses data from the library/gsw_data_v3_0.mat
file provided in the GSW-Matlab source code, version 3.06-11.
Unfortunately, this version of the mat file is no longer displayed on the
TEOS-10.org website. Therefore, in the interests of making GSW-R be
self-contained, a copy was downloaded from
http://www.teos-10.org/software/gsw_matlab_v3_06_11.zip on 2022-05-25,
the .mat file was stored in the developer/create_data directory of
https://github.com/TEOS-10/GSW-R, and then the dataset used in GSW-R
was created based on that .mat file.
Please consult http://www.teos-10.org to learn more about the various TEOS-10 software systems.
http://www.teos-10.org/pubs/gsw/html/gsw_grav.html
lat <- c(-90, -60, -30, 0)
grav <- gsw_grav(lat)
stopifnot(all.equal(grav, c(9.832186205884799, 9.819178859991149,
9.793249257048750, 9.780327000000000)))
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