General perturbations theories derived from the 1965 lane drag theory
Abstract
The Air Force General Perturbation theory (AFGP4) based on the analytic satellite theory of Lane (1965) and Lane and Cranford (1969) which models the gravitational zonal harmonics through J5 and models the atmosphere with a spherically symmetric power density function is given here in its complete form. All equations needed for satellite prediction are given and the reader is referred to the original publications for theoretical background. Two simplified equation subsets (IGP4 and SGP4) of AFGP4 are also given and the procedure by which they were obtained is outlined.
 Publication:

NASA STI/Recon Technical Report N
 Pub Date:
 December 1979
 Bibcode:
 1979STIN...8023347L
 Keywords:

 Atmospheric Models;
 Equations Of Motion;
 Gravitation Theory;
 Harmonics;
 Perturbation Theory;
 Satellite Perturbation;
 Trajectory Analysis;
 Drag;
 Flux Density;
 Power Spectra;
 Astrodynamics