GPS信号模拟器卫星状态参数的算法研究，模拟器，轨道参数，非球形地球引力。-GPS satellite signal simulator state parameters of the algorithm, simulator, orbital parameters, non-spherical Earth' s gravity.

航天器动力学MATLAB程序，考虑大气阻力，估计神舟飞船每运行一个周期，轨道高度下降多少-Spacecraft Dynamics MATLAB program, consider the atmospheric drag, estimated that the Shenzhou spacecraft each run a cycle, the number of orbital altitude drop

已知轨道根数，用代数法求卫星轨迹，并画含有地球模型的动图-Known orbital number, the algebraic method for satellite trajectory, and painted with the earth model of the dynamic map