A design method for implementing regional coverage satellite communication system with medium earth orbit(MEO)common-track constellation(CTC)was studied.A coded notation which can describe CTC entirely was proposed and some optimal constellation schemes for China were presented.Moreover
the parameters of these constellations were adjusted again according to the time-varying traffic distribution density
which improved the consistency between the coverage performance of constellations and the traffic distribution density.The simulation results show that CTC can provide favorable coverage performance to China area with fewer satellites.