GNSS Positioning Data

This dataset is GNSS observation data collected in Qufu City, Shandong Province in 2021, consisting of two OBS format observation files. The file naming adopts structured encoding: the first two digits "QF" represent the location of the survey area (Qufu), the third and fourth digits identify the survey station number (where "01" is the reference station and "04" is the mobile monitoring station), and the last three digits are the corresponding year and day of observation. The data content covers dual frequency pseudorange and carrier phase observations of the four major global satellite navigation systems, GPS, Beidou (BDS), GLONASS, and Galileo, and supports multi system fusion processing. This dataset is suitable for high-precision relative positioning (such as static baseline calculation, dynamic differential positioning), research on multi system GNSS data processing methods, receiver performance testing, and related teaching experiments. The observation files strictly follow the RTCM 3. x protocol format and are compatible with mainstream GNSS processing software such as GAMIT/GLOBK, Bernese, RTKLIB, etc., making it easy to carry out high-precision positioning calculations and scientific research. The data has undergone preliminary quality checks and effectively reflects the multi system satellite visibility and observation environment of the period and region, with certain scientific research and teaching application value.