The backward diffraction on the shadow area of aircraft and its components having low radar-cross-section (RCS) is one of the main contributions of their RCS.
阴影区的后向绕射是低散射截面飞行器和部件rcs的主要贡献之一，有效地抑制它可以进一步地减缩rcs。
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It was clipped from an old faded Poloroid taken while it was parked at RDU airport and the landing gear was not visible in the SUNS shadow - hence no landing gear on the otherwise fixed gear aircraft.