The enclosed Pascal source code implements the NORAD SGP4/SDP4 orbital models for use with the standard two-line orbital element sets to determine earth- centered inertial (ECI) and topocentric coordinates of earth-orbiting objects. This code implements both the near-earth and deep-space portions of the NORAD SGP4 orbital model. This program is built on the new Pascal units contained in SGP4-PL2.ZIP (SGP4 Pascal Libraries Version 2.50
