Bernese GNSS Software Version 5.2 Tutorial

7.3 Zero Difference Processing for Clock Estimation7.3.1 PreprocessingThere are two ways for preprocessing zero difference observations in the Bernese GNSSSoftware, Version 5.2 available:• Precise satellite clocks are available for all satellites with the same sampling as theRINEX observations to be processed (typically 30 s):1. RNXSMT to screen and smooth code measurements based on a consistencycheck between the code and phase observations2. RXOBV3 to import the screened smoothed code together with the original phasedata into Bernese observation file format3. CODSPP to synchronize receiver clocks with respect to the GNSS system time4. MAUPRP to screen the phase measurements5. GPSEST, RESRMS, SATMRK to screen residuals from a zero difference networksolution• Precise satellite clocks are not available:1. RNXSMT to screen phase and code measurements based on a consistency check;smooth the code observations2. RXOBV3 to import the screened phase and smoothed code data into Berneseobservation file format3. CODSPP to synchronize receiver clocks with respect to the GNSS system time4. GPSEST, RESRMS, SATMRK to screen residuals from a zero difference networksolution iteratively with a descreasing thresholdIn this text book we follow the second approach.The preprocessing of zero difference data starts with program RNXSMT, available from"Menu>RINEX>RINEX utilities>Clean/smooth observation files". In the first panel select all RINEX filesof the active session:Bernese GNSS Software, Version 5.2 Page 113