This library contains the basic ephemeris code.

Earth satellite orbit propagation is based on the NORAD SGP4/SDP4 code, as
converted from the orginal FORTRAN to C by Magnus Backstrom. The paper
"Spacetrack Report Number 3: Models for Propagation of NORAD Element Sets"
describes the calculations.
See http://www.celestrak.com/NORAD/documentation/spacetrk.pdf.
He following files implement this package:
    actan.c
    deep.c
    deepconst.h
    satlib.h
    satspec.h
    sattypes.h
    sdp4.c
    sgp4.c
    thetag.c
    vector.h

! For RCS Only -- Do Not Edit
! @(#) $RCSfile: README,v $ $Date: 2001-10-22 12:08:25 $ $Revision: 1.2 $ $Name: not supported by cvs2svn $