An Un-differenced Carrier Phase Time Transfer Method Between Stations

Abstract

GNSS carrier phase time transfer use PPP technology generally, has become the satellite two-way time comparison (TWTFT) widely used high precision time comparison method, due to its simple equipment, high precision, the global time become the important means of backup TWTFT of lab.An un-differenced carrier phase time transfer method between stations is proposed. Using the relations between un-differenced observation equations which established through common view satellites, the results of the satellite clock offset and interstation time transfer can be calculated jointly. It is not limited by the accuracy and real-time performance of the satellite clock. As long as there is enough total station between apparent between satellite can gain standing time transfer as result, the precision clock difference from satellite product precision and real limit, time pass accuracy can reach the nanosecond level, good real-time, more suitable for real-time and high precision time transfer. Experimental results show that the time transfer accuracy of the proposed algorithm can reach sub-nanosecond magnitude, and it can be applied to high precision real-time time transfer.