

=head1 NAME

  Azimuth - a program to view azimuth patterns

=head1 SYNOPSIS

  Azimuth [NEC2outputfile]

=head1 DESCRIPTION

B<Azimuth> reads files produced by NEC2 and provides three graphical
depictions of that data, as well as a ``fact sheet'' summary.
The default NEC2outputfile is ``fort.2''.

The three ``plots'' of output data include an ARRL-scaled polar graph,
a linearly-scaled polar graph, and a cartesian graph of the same data.

If the minimum gain of an antenna is below -60 db, the program
assumes a minimum gain of -60 db for the purposes of scaling the
graphs
properly.

In order to use B<Azimuth> you must have NEC2 calculate certain data.
The ``RP card'' for NEC2 input must be of this form:

S<RP  0  1    361 1001  75.0  0.0  0.0  1.0  10000.0 0.00E+00>

This will insure that B<Azimuth> has the data it expects.


A sample data file which describes a rhombic is included with Azimuth,
and is reproduced here also.  


S<
CM NEC Input File for Rhombic
CE
GW  1 10   0.00000   0.00000  10.00000  17.30000  10.00000  10.00000 0.01000
GW  2 10   0.00000   0.00000  10.00000  17.30000 -10.00000  10.00000 0.01000
GW  3 10  17.30000  10.00000  10.00000  34.60000   0.00000  10.00000 0.01000
GW  4 10  17.30000 -10.00000  10.00000  34.60000   0.00000  10.00000 0.01000
GE  1
GN  1  0    0    0  0.00E+00  0.00E+00  0.00E+00  0.00E+00  0.00E+00 0.00E+00
FR  0  1    0    0  3.00E+01  0.00E+00  0.00E+00  0.00E+00  0.00E+00 0.00E+00
EX  0  1    1    0  1.00E+00  0.00E+00  0.00E+00  0.00E+00  0.00E+00 0.00E+00
EX  0  2    1    0 -1.00E+00  0.00E+00  0.00E+00  0.00E+00  0.00E+00 0.00E+00
LD  0  3   10   10  2.90E+02  0.00E+00  0.00E+00  0.00E+00  0.00E+00 0.00E+00
LD  0  4   10   10  2.90E+02  0.00E+00  0.00E+00  0.00E+00  0.00E+00 0.00E+00
RP  0  1    361 1001  75.0  0.0  0.0  1.0  10000.0 0.00E+00
EN
>

A NEC2outputfile that results from this input file is included in
the Azimuth distribution directory as "fort.2".  A file called "azimuthcard"
is also included.  That file contains only an appropriate "RP card".



B<Azimuth> is part of the W5GFE Perl Antenna Toolkit.  It is released
under terms of the GNU Public License.



=head1 AUTHOR

Bill Walker, W5GFE, bw@cs.ecok.edu

=head1 SEE ALSO

perl(1), Wires.pl (W5GFE), Elevation.pl (W5GFE), necview (W5GFE)



=cut
  
