sgeo_grd(3m)

NAME
sgeo_grd - Calculate and plot geostrophic slope height

SYNOPSIS
sgeo_grd(vg_file, out_file, yb, x, s0, v_scale , s_scale, v_dir, depths, plt, info, inst )

DESCRIPTION
Read geostrophic current data from a grid ascii file, as output by C utility vgeo(1) and compute the corresponding slope heights. Generate a plot for each of the specified depths and save data into an ascii file. The input file must contain the following columns: Time in decimal days Longitude in degrees Latitide in degrees Depth in meters Geostrophic current This function requires a lot of parameters. The best way is to use it from Matlab script sgeo(1m).

PARAMETERS

vg_file
    Name if input file with geostrophic current data.

out_file
    Root name of output file. Suffixes are automatically added.

yb  Base year used to determine the decimal days in the input file.

x   Column number to x-axis for plotting. It must be one of 1,2 or 3. If negative,the axis direction will be reversed.

s0  Initial slope value in meters.

v_scale
    Factor to get geostrophic currents from input file in m/s.

s_scale
    Scaling factor for plotting slope height points.

v_dir
    The direction that was used to compute the geostrophic current. This is necessary in order to get the correct slope variations. This is one of northward,southward,westward of eastward.

depths
    Array with depths values at which plotting of slope heights is desired. The values must be present in the input file (i.e. no interpolation is carried out here). If empty,all available depths in the input file will be plotted.

plt Title of plot.

info
    Additionnal information string.

inst
    Institute stamp.

OUTPUT
The following files are generated:

out_file.ps
    Postcript output of plot.

out_file.asc
    Ascii data of slope height values.

AUTHORS
Pierre Jaccard, Geophysical Institute, University of Bergen, 1999