From the backscattering measurements of a two-point target consisting of two spheres

it is found out that the backward angular glint can be obtained by evaluating the derivative of the measured data of backscattering echo relative phase vs incident angle.A representative vector model of a N-point target consisting of N anisotropic scattering elements is proposed and investigated to reveal the inherent law implied by the experimental phenomenon. The theoretical results show that

under given conditions

there exists equivalence between the backward angular glint and the derivative of backscattering echo relative phase with respect to incident angle. This work not only clears up a misunderstanding on the concept of angular glint

but also provides theoretical basis for obtaining angular glint by backscattering measurement in the case of no bistatic measurement capability.