"Gravitational Wave Rockets" provides an in-depth mathematical presentation on methods of approximating general relativistic scale gravitational waves and space-time warpage by modified Fourier Series. Accordingly, Keplerian scale gravitational wave equations are used as basic trigonometric series in modified Fourier series as methods to model space-time compression and expansion. Several specific wave-forms are included within this cutting edge digression. The author presents these approximations as methods to enable increased effective Lorentz factors in virtually light-speed travel with consideration of superluminal travel as combinations of both inertial or translational travel through space and space-time warpage. These proposed approximations can in principle enable enhanced light-speed impulse travel and at least ever-so-slightly superluminal travel.