2 research outputs found
Multiple agile Earth observation satellites, oversubscribed targets scheduling using complex networks theory
The Earth observation satellites (EOSs) scheduling is of great importance to
achieve efficient observation missions. The agile EOSs (AEOS) with stronger
attitude maneuvering capacity can greatly improve observation efficiency while
increasing scheduling complexity. The multiple AEOSs, oversubscribed targets
scheduling problem with multiple observations are addressed, and the potential
observation missions are modeled as nodes in the complex networks. To solve the
problem, an improved feedback structured heuristic is designed by defining the
node and target importance factors. On the basis of a real world Chinese AEOS
constellation, simulation experiments are conducted to validate the heuristic
efficiency in comparison with a constructive algorithm and a structured genetic
algorithm
Task Scheduling of Multiple Agile Satellites with Transition Time and Stereo Imaging Constraints
This paper proposes a framework for scheduling the observation and download
tasks of multiple agile satellites with practical considerations such as
attitude transition time, onboard data capacity, and stereoscopic image
acquisition. A mixed integer linear programming (MILP) formulation for optimal
scheduling that can address these practical considerations is introduced. A
heuristic algorithm to obtain a near-optimal solution of the formulated MILP
based on the time windows pruning procedure is proposed. A comprehensive case
study demonstrating the validity of the proposed formulation and heuristic is
presented