			*************
			*  Credits  *
			*************

SGP4/SDP4 models and sun/moon position algorithms used in this
version of PREDICT were derived from "satcom-08", written by
Neoklis Kyriazis, 5B4AZ, and released in 2002 under the GNU
General Public License.  Parts of "satcom-08" were derived
through a translation into 'C' of SGP4 and SDP4 code written
originally in FORTRAN and Pascal by Dr. T.S. Kelso.  Dr. Kelso's
code is available on his web site at https://celestrak.org/.

Socket-based server code was contributed by Ivan Galysh, KD4HBO
on 10-Jan-2000.

The Perl UDP client demonstration program was contributed by Rich
Parry, W9IF.

The concept of using "xearth" as a graphical display for PREDICT
was originally conceived by Wade Hampton (that later developed
into "earthtrack" and "earthtrack2").

Many others have contributed code to the project, including
Bent Bagger OZ6BL, Tom Busch WB8WOR, Steve Fraser VK5ASF,
Xavier Crehueras, EB3CZS, Takeshi-Okazaki (Satellite Engineer
for MTSAT-1R (HIMAWARI 6)), Dimitris Angelou, SV9TAT,
Thomas Ingebretsen, LA9ERA, and Norvald Ryeng, LA6YKA and others.

Calculations for squint angle were adopted from trk-0.4.1 by Lapo
Pieri, IK5NAX.

Joeal Subash contributed code for the new "QuickDoppler" feature.

PREDICT is also the product of many others who have contributed
bug reports, bug fixes, helpful suggestions, and positive support.

THANK YOU!  :-)


--
John A. Magliacane, KD2BD
Lead Developer
kd2bd@qsl.net
July 2026

