Space target ISAR image sequence energy back projection and three-dimensional reconstruction method

The invention discloses a space target ISAR image sequence energy back projection and three-dimensional reconstruction method and belongs to the technical field of radar signal processing. The methodcomprises steps of firstly, obtaining a high-resolution two-dimensional ISAR image sequence of a space target by adopting a distance-Doppler algorithm; secondly, constructing a space target observation model based on the motion characteristics of the three-axis stable space target, and calculating a projection matrix of the three-dimensional position of the scattering center of the space target and coordinates of a two-dimensional ISAR image by using the measurement information of a radar on the space target; and lastly, sequentially optimizing and solving the three-dimensional position of theequivalent scattering center on the space target through a particle swarm optimization algorithm by utilizing an energy back projection principle so as to realize three-dimensional reconstruction ofthe space target. The metho