现需要在高度为600~700KM范围内，回归周期为30天的太阳同步轨道上布置一颗L波段的合成孔径雷达卫星。 1. 请设计合适的轨道参数，并仿真对应轨道下一个运行周期内星下点轨迹图（纬度和经度两个图）； 2. 计算多普勒中心频率，多普勒调频率与纬度的关系图（设姿态角为0°，天线视角20°~60°，推荐35°）； 3. 按高斯投影方式，将星下点轨迹图投影到地图坐标上。-Now requires a height of 600 ~ 700KM range, return period

卫星轨道参数正反算，根据卫星的位置和速度，求取实时卫星轨道的两行根数，即6个开普勒根数。卫星星历计算以及卫星轨道参数计算-Considered the pros and cons of satellite orbit parameters, depending on the location and speed of the satellite, two lines of strike root of the number of real-time satellite orbit that Ke

两个轨道计算的子程序，四元素乘积计算法和空间轨道动力学方程递推的扩展卡尔曼滤波算法。-Calculation subroutine two tracks, the four elements of the product of calculation and orbital dynamics space equation recursive extended Kalman filter algorithm.

The code Band_Analysis can symmetrize the band dispersions calculated using VASP (Vienna Ab-initio Simulation Package), and it also can calculate the projections of each orbital on each atom.