Research and Realization of Key Data Pretreatment Technology for GPS Differential Positioning

To find an effective method to translate GPS raw message into RINEX file is attempted.The structure of RINEX data file is introduced.The conversion method from every message to RINEX counterpoint is discussed and the emphasis is laid on full carrier phase and Doppler value.At last,the arithmetic flow applied to generate RINEX file is presented.As an application,CMC message is translated successfully into RINEX file.Testing results demonstrate the generated file measures up to RINEX standard and meet GPS post-differential on positioning precision.