多通道和单通道接收到的北斗信号数据，利用接收到的北斗数据（.dat .txt文件），进行解析，得到初始伪距，平滑伪距，载波相位，并计算其标准差，并画图。(The Beidou signal data received by multi-channel and single channel are analyzed by using the Beidou data (. Dat. TXT file). The initial pseudo range, smooth pseudo range an