摘要
Abstract
With the completion of BDS-3 and the announcement of the PPP-B2b signal broadcast through geostationary Earth orbit(GEO)satellites,the positioning and timing accuracy of Beidou satellites has once again been improved.In order to study the positioning accuracy and time transfer performance of PPP-B2B,the authors carry out PPP B2b related experiments on BDS-3.In experiments,six stations in the Asia-Pacific region are selected for static and dynamic precision single point positioning research,and then NTSC and USUD stations are selected for time transfer research.The positioning results show that the root mean square(RMS)values in East(E)direction,North(N)direction and Up(U)direction of PP-B2B static positioning of B1I/B3I combination and B1C/B2a combination are 4.58 cm,5.34 2.2cm and 4.18 cm,4.97 cm,2.22 cm,respectively.The RMS values of the B1I/B3I and B1C/B2a PP-B2B dynamic positioning in E direction,N direction and U direction are 17.99 cm,19.41 cm,12.72 cm and 22.47 cm,21.61 cm,15.11 cm,respectively.The two combinations show the consistency of positioning accuracy.The time transfer of PPP-B2B zero-base line common clock generally fluctuates within 1 ns,the STD of time transfer is 0.203,and the stability of 100 000 seconds reaches 5.336×10-15.The time transfer of PPP-B2b long baseline generally fluctuates within 5 ns,the time transfer STD is 1.585,and the time transfer STD reaches 3.55×10-14 in 10 000 seconds.Therefore,B2b products can meet the requirements of centimeter-level positioning and nanosecond timing in the Asia-Pacific region.关键词
"北斗"三号/PPP-B2b/精密单点定位/时间传递Key words
BDS-3/PPP-B2b/precise point positioning/time transfer分类
信息技术与安全科学
