predict4java provides real-time satellite tracking and orbital prediction information.

This is a Java port of the core elements of the Open Source Predict program, written by John A. Magliacane (KD2BD).

Dr. T.S. Kelso is the author of the SGP4/SDP4 orbital models, originally written in Fortran and Pascal, and released into the public domain through his website: www.celestrak.com

Neoklis Kyriazis, 5B4AZ, later re-wrote Dr. Kelso's code in C, and released it under the GNU GPL in 2002. PREDICT's core is based on 5B4AZ's code translation efforts.

The Author of this version is: David A. B. Johnson, G4DPZ dave@g4dpz.me.uk