NEW COMPUTER SOFTWARE FROM NASA 
ANTENNA DESIGN

POMESH is a computer program developed at NASA's Jet Propulsion Laboratory
to predict the performance of reflector antennas. Both far field pattern
and gain calculations are performed using the Physical Optics (PO)
approximation of the equivalent surface currents. POMESH is primarily
intended for relatively small reflectors. It is useful in situations where
the surface is described by irregular data that must be interpolated and
for cases where the surface derivatives are not known. This method is
flexible and robust and also supports near field calculations. Because of
the near field computation ability, this computational engine is quite
useful for subreflector computations. The program is constructed in a
highly modular form so that it may be readily adapted to perform tasks
other than the one that is explicitly described here. Since the
computationally intensive portions of the algorithm are simple loops, the
program can be easily adapted to take advantage of vector processor and
parallel architectures.

POMESH, inventory number NPO-18807, is written in FORTRAN 77 r execution on
CRAY series computers running UNICOS. With minor modifications, it has
also been successfully-implemented on a Sun4 series computer running
SunOS, a DEC VAX series computer running VMS, and an IBM PC series
computer running OS/2. It requires 2.5Mb of RAM under SunOS 4.1.1, 2.5Mb
of RAM under VMS' 5-4.3, and 2.5Mb of RAM under OS/2. The OS/2 version
requires the Lahey F77L compiler. The standard distribution medium for
this program is one 5.25 inch 360K MS-DOS format diskette. It is also
available on a .25 inch streaming magnetic tape cartridge in UNIX tar
format and a 9-track 1600 BPI magnetic tape in DEC VAX FILES-ll format.
POMESH is a copyrighted work with all copyright vested in NASA. Program
$500; documentation $17.

COSMIC, The University of Georgia
382 East Broad St, Athens, GA 30602-4272
(706) 542-3265;  Fax: (706) 542-4807

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