Research on Common-View Comparison Method Based on GNSS Satellite

Based on GNSS satellite common-view comparison method is currently one of the main comparison methods used in the standard time reproduction system of the National Time Service Center of Chinese Academy of Sciences. It has the characteristics of high precision, wide application range and low cost. In order to evaluate the GNSS satellite common-view comparison performance, satellite common-view time comparison stations have been built in the city of Xi 'an, Xuyi and Sanya to test and verify. In this paper, the common view comparison test is carried out at different stations in the system under different baseline lengths. The experimental results show that the accuracy of common-view comparison can be achieved within <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$2\text{ns}$</tex> under both short and long baseline conditions.