Agile satellite target decomposition method and system based on push-broom trajectory

摘要

When a target is in range of a satellite, a minimum swath width (eta) is calculated to account for attitude changes of the satellite, and represent the width which is certain to be within targeting range of the satellite. A push-broom trajectory, which represents the projection of the satellites path onto the imaged surface, is calculated using the minimum strip width and the boundaries of the targeted region. The push-broom trajectory and the minimum strip width are then substituted into a model, which uses a conjugate quaternion-based coordinate transformation, to calculate coordinates of the four vertices of the strip. To ensure coverage of the entire region by overlapping strips, the planes containing the push-broom trajectories may be generated recursively. The final strip may be corrected, by shortening it and/or moving it inwards, to avoid redundancies in detection. Strips to cover linear targets may be obtained by fitting using forward matching.