文献：模糊参数整数约束的GPS卫星定轨与轨道改进定位

本程序用于统计GPS卫星可见弧段的定轨精度，需要读取定轨精度文件和残差文件。-The procedure used for GPS satellite visibility statistics arc orbit determination accuracy and precision of orbit determination to read the file and residual files.

读取欧洲定轨中心CODE公布的DCB文件CODGXXX0.XXI，以及读rinex格式观测及导航文件(read DCB file which is referred as CODGXXX0.XXI released by CODE, read .o and .n Rinex files.)