According to the public system documents, the positioning accuracy of the Beidou satellite navigation system in the world will reach 10 m horizontally and 10 m vertically (95%). In the Asia-Pacific region, the positioning accuracies are 5 m horizontally and 5 m vertically (95%) [3]. In addition to the BeiDou navigation system, the GNSS has another three major global navigation systems. The Global Positioning System (GPS) was launched by the US Department of Defense in 1973. Its space segment consists of 24 satellites and 3 standby satellites. [14]. GPS III, a new generation of modern GPS satellites, has higher navigation accuracy, transmission power, and signal integrity with the new L1C civil signal [15]. The Galileo system consists of 24 operational satellites and 6 standby satellites [14]. The Galileo system plans to carry out extensive infrastructure development and deployment activities to achieve full operational capability (FOC) [16]. The GLONASS system launched its first networking satellite in 1982. Its fully operational constellation consists of 24 satellites distributed in three orbital planes. It will deploy GLONASS-K2 satellite and improve the tracking network to meet the needs of modernization [17]. With the advent and wide application of BDS-3, people have carried out all-round research on BDS-3, including signal characteristics, positioning accuracy, precision point positioning (PPP), etc. The comparison of BDS-3 features with other satellite navigation systems has also been widely promoted. [PERSON] et al. [18] points out that the signal strength of the same type of satellite BDS-3 is greater than that of BDS-2. The MP combination is used to study the deviation between the pseudo-range and carrier phase measurement of BDS-3 and BDS-2. The authors point out that the BDS-2 coding is affected by the satellite-induced deviation of 1 m from the horizon to the zenith. [PERSON] et al. [19] calculated the signal-in-space range error (SISRE) of different types of navigation satellites. The average SISREs of BDS-3 MEO, IGSO, and GEO satellites are 0.52 m, 0.90 m, and 1.15 m. The SISRE of BDS-3 MEO satellite is slightly lower than that of Galileo by 0.4 m, slightly higher than that of GPS by 0.59 m, and significantly better than that of GLONASS by 2.33 m. BDS-3 can achieve significant positioning accuracy. [PERSON] [20] uses the user equivalent range error (UERE) to describe the signal quality of BDS-3 satellite in polar and global conditions. The UERE of BDS-3 is in the range of 0.5-1.0 m. To eliminate the ionosphere delay, orbit error, multipath error, troposphere delay, and satellite clock error, the zero-baseline experiment can be used for analysis. It can also evaluate the ranging accuracy of the signal. [PERSON] et al. [21], using zero-baseline inter-station single-difference (SD) and ultra-short-baseline SD methods determines that the measurement accuracy of the BDS-3 system code and carrier phase are 33 cm and 2 mm, respectively. [PERSON] et al. [22] used three zero-baseline experiments to find that the noise of code phase measurement and carrier measurement of BDS-3 are improved compared with BDS-2, and millimeter-level noise is measured on the B3I signal. [PERSON] et al. [23] compared and fused the observation accuracy of BeiDou and GPS by using the zero-baseline experimental data. The relative positioning accuracy of BeiDou can reach millimeter level, but it is lower than that of GPS. The integrated use of BeiDou and GPS can improve positioning accuracy. In addition, the initial positioning performance of the BDS-3 under different modes such as single-point positioning and RTK is also studied [24; 25; 26]. The above research on ranging performance and accuracy often requires a long time of complex observation and tedious post-processing of data operation, so it is impossible to directly obtain an index to quantitatively measure the signal ranging performance.