EL Perturbed Motion at Other Elevation Angles Nominal Elevation Angle of 25 Degrees 8 Elevation angle of 25 degrees number of oscillations per revolution decreases with decreasing nominal elevation angle y-aXIs vavIc Nominal Elevation Angle of 45 Degrees 8 Elevation angle of 45 degrees speed increases with increasing nominal elevation anglePerturbed Motion at Other Elevation Angles Perturbed Motion at Other Elevation Angles F Elevation angle of 25 degrees — number of oscillations per revolution decreases with decreasing nominal elevation angle F Elevation angle of 45 degrees — speed increases with increasing nominal elevation angle -1 -0.5 0 0.5 1 -1 -0.5 0 0.5 1 0 0.2 0.4 0.6 0.8 1 x-axis Nominal Elevation Angle of 25 Degrees y-axis -1 -0.5 0 0.5 1 -1 -0.5 0 0.5 1 0 0.2 0.4 0.6 0.8 1 x-axis Nominal Elevation Angle of 45 Degrees y-axis