SKYPLOT for a given receiver position Y=skyplot(X,PRN,C,O) draws the skyplot for the receiver position. The required inputdata for the calculation of the skyplot X is N-by-3*M matrix, where N are the timesteps and M is the number of the Sat

采用最小二乘原理，进行了伪距单点定位计算；包含广播星历计算计算卫星坐标，地固系与WGS84坐标系间转换，最小二乘平差计算，定位几何因子GDOP等-Using least square method, we carried out pseudorange single point positioning calculation contains satellite ephemeris calculation calculate coordinates secured between the sy