G. Der

New Angles-only Algorithms for Initial Orbit Determination

G. Der, 2011 .

Conversion of Osculating Orbital Elements to Mean Orbital Elements

Roy Danchick, Gim J. Der, R. Danchick, 1996 .

An elegant state transition matrix

G. J. Der, G. Der, 1996 .

The Superior Lambert Algorithm

Gim J. Der, G. Der, 2011 .