Quality analysis of BDS／GPS engineering control network

Aiming at the application problem of establishing engineering control network of BeiDou Navigation Satellite System (BDS).Taking a control network in Guangdong Province as an example, the indicators are compared with GPS from the quality of observation data, baseline calculation and adjustment accuracy, and differences in coordinate results, which verified the feasibility of the BDS system to establish an engineering control network. The results show that the number of BDS visible satellites is almost as same as GPS, and the accuracy of the BDS baseline solution and adjustment of is slightly lower than GPS as a whole, and it is relatively more obvious in the U direction. When the quality of the station data is good, the average BDS／GPS coordinate results have only millimeter differences, which can completely replace GPS as the final result; When the station data quality is poor, the coordinate results have average millimeter to centimeter differences, which can meet the requirements of general engineering control networks.