
C++ NORAD SGP4/SDP4 Implementation
Developed by Michael F. Henry

Copyright  2003-2020 Michael F. Henry. All rights reserved.
Permission to use for non-commercial purposes only.
All other uses contact author at mfh@zeptomoby.com

The files in this directory are compiled to make the two OrbitTools libraries:
   orbitTools.core.lib
   orbitTools.orbit.lib

The "core" library contains several utility classes:

   cTle   This class encapsulates a single set of NORAD two-line elements.
   cSite  Describes a location on the earth. Given the ECI coordinates of a 
           satellite, this class can generate Azimuth/Elevation look angles to 
           the satellite.
   cEci   This class encapsulates Earth-Centered Inertial coordinates and 
           velocity for a given moment in time.
   cJulian - Encapsulates a Julian date/time system.

The "orbit" assembly contains the main SGP4/SDP4 implementation:

   cSatellite - The main class used to determine satellite location and
            velocity in orbit. Requires a cTle object.
   cOrbit  This class provides detailed information about the orbit of a 
            satellite, including inclination, perigee, eccentricity, etc.
            This class is used by cSatellite.
   cNoradBase, cNoradSGP4, cNoradSDP4  These classes implement the NORAD 
            SGP4/SDP4 algorithms. They are used by class cOrbit to calculate the
            ECI coordinates and velocity of its associated satellite.

All classes are contained within the Zeptomoby.OrbitTools namespace.

The project files were compiled using Microsoft Visual Studio 2017.

Michael F. Henry
February, 2020