Abstract: An apparatus for determining the bank angle of an aircraft and method includes a receiver for receiving navigational signals from NAVSTAR/GPS satellites in orbit about the earth, a signal processor for demodulating the satellite navigational signals, an arrangement for determining a sensitivity value, the sensitivity value being defined as the amount of bank angle displayed per rate of change of track heading, an arrangement for determining the rate of change of the aircraft track heading from the navigational signals, an arrangement for determining the bank angle of the moving aircraft from the sensitivity value.

Abstract: An apparatus for determining the bank angle of a moving aircraft includes a receiver for receiving navigational signals from NAVSTAR/GPS satellites in orbit about the earth, a signal processor for demodulating the satellite navigational signals, an arrangement for determining aircraft speed based on the navigational signals, an arrangement for determining the rate of change of the aircraft track heading from the navigational signals, an arrangement for determining the bank angle of the moving aircraft from the aircraft speed and the rate of change of track heading wherein the aircraft bank angle is inversely proportional to the aircraft speed and directly proportional to the rate of change of track heading.