Abstract:

At present, there are almost 2000 GNSS CORS stations across China as the construction of GNSS continuous operation reference station network nearly completed. With the increase of the amount of the sites, the efficiency of GNSS data processing urgently need to improve, while the traditional high precision data processing software represent the deficiency to compute so many more data. Based on BERNESE5.2 software, the data processing method of large scale GNSS network amount to 260 stations by CMONOC project is studied. The fast, efficient and high precision data computing capability had been got by modifying source program and utilizing the parallel computation technology. The experiment shows that the data of 260 stations in a single day can be processed within 1 hour without divided into sub-net to get the daily constrained coordinate in ITRF2008 frame with a millimeter scale accuracy, which highly improves the data processing capability of large scale GNSS network for national data center.

Key words: reference frame, large scale GNSS network, parallel computation, processing method