The DLR Institute of Aeroelasticity in Göttingen, Germany, has developed a real-time procedure to analyze aircraft vibrations from atmospheric turbulence and impulsive pilot controls directly in flight. These methods allow the simultaneous identification of various aircraft parameters which are necessary to evaluate the aeroelastic stability, and, at the same time, are dependent on the flight condition, like eigenfrequencies, mode shapes and damping ratios. The fast interaction between analysis software and the measurement system also allows for an instantaneous maneuver loads analysis.