Notes on Aircraft Flutter Scenarios

• 3 - D environments will reduce the doppler shifts related to the angle of  the aircraft to the 2- D Scenarios shown

• The 2 - D scenarios shown are the worse case

• Maximum reflection is likely to occur when the Incident angle equals the  Reflected angle..The doppler shift is then zero.

• The magnitude of the reflections when there is un-equal Incident and  Reflected angle will depend upon the complex shape of the aircraft or  vehicle, gain (front ,side and rear) of the receive antenna.

• The magnitudes of the reflections from the aircraft have the potential of  being high compared to the terrain obstructed and ground cluttered  direct path.

Notes on the Scenarios :

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