Global Coverage Constellation Design for Internet of things using NSGAII Algorithm.

To meet the needs of the space-based Internet of Things (IoT) development, this paper proposes a global coverage constellation design method and a constellation coverage index concept. Satellite Tool Kit (STK) software was used to verify the effectiveness of constellation coverage index. The constellation capacity, constellation coverage index and constellation cost are analyzed by the number of orbital planes, the number of orbital satellites and orbital altitude. And the global coverage constellation is designed by the three indicators. The non-dominated sorting genetic algorithm with elite strategy (NSGAII) is used in this paper. According to the different weights of constellation capacity, constellation coverage index and constellation cost, four constellation design schemes are proposed. The effectiveness of the proposed schemes are proved by comparing the simulation with iridium constellation. Therefore, the global coverage constellation design method proposed in this paper can provide a reference for the space-based internet of things design.