Research on common view time frequency transfer based on RINEX format observation data

GNSS common view time frequency transfer technology, satellite bidirectional time frequency transfer technology and precise single point positioning technology are the current long-distance high-precision time-frequency comparison technology.In this paper, we use RINEX format common view data to compare the time and frequency of common view. This method obtains a data point in 30s. Compared with the traditional common view comparison method using cggtts data, this method has higher frequency.This paper evaluates the performance of cggtts data and RINEX data in frequency stability calculation. The results show that the frequency stability of cggtts format data is 1.7e-l29600s, 2.0e-l386400s and 5e-l4. The frequency stability of 960s is 8.6e-l3 9600s is 1.5e-l3 86400s is 2.3e-l4 calculated by RINEX format data. According to the monitoring of the measured frequency source, the 960s frequency stability of the measured frequency source is 1.2e-l29600s, the frequency stability is 1.6e-l386400s, and the frequency stability is 2.0e-l4. The results show that the frequency stability calculated by RINEX format data is closer to the real results.