# hdg_diff

##

Last updated Sun Sep 19 11:54:24 1999

Compare mean and end ping heading

## 1. USAGE

hdg_diff

## 2. DESCRIPTION

This is an interface to function hdgdiff(3m).

## 3. PARAMETERS

The following parameters must be edited:

year_base

  Base year used for the decimal times in input file.

asc_file

  Input data file.

plot_title

  Title for the plot.

note

  Additionnal string to print on the plot.

## 4. AUTHORS

Pierre Jaccard, Geophysical Institute, University of Bergen, 1999