【摘 要】
：
The satellite differential code bias (DCB) characterizes the time it takes for the signal to travel from the reference clock to the transmitting antenna. The internal delay of the signal can be up to
【机 构】
：
Shandong University of Science and Technology, Qingdao, Shandong, China;Chinese Academy of Surveying
论文部分内容阅读
The satellite differential code bias (DCB) characterizes the time it takes for the signal to travel from the reference clock to the transmitting antenna. The internal delay of the signal can be up to ten nanoseconds, and the pseudorange can be up to the meter level. It must be corrected when high-precision point positioning. This paper analyzes the DCB correction formulas of different pseudorange combinations of GPS and BDS. Using GPS, GPS+BDS, GPS+GLAONASS+BDS and iGMAS released DCB products, standard single point positioning (SPP) and precise point positioning (PPP) solutions are performed for multiple stations in China. The results show that after DCB correction, the SPP accuracy is improved in decimeters, the average improvement rate of the three schemes is about 30%. The static PPP accuracy has a millimeter-level improvement and the accuracy is improved by about 10%. DCB correction has the greatest impact on the positioning of single GPS system. However, when multi-system combination positioning is performed, the influence of DCB correction on positioning accuracy is weakened, the improvement rate is greatly reduced, and the coordinate precision improvement of some stations is sub-millimeter.
其他文献
Water level information is one of the basic parameters to ensure the safety of reservoir dams and optimize the operation of water resources. In recent years, the research on monitoring altitude differ
The meteorological parameters such as the temperature and the pressure are crucial for tropospheric delay correction of Satellite Laser Ranging (SLR). Considering that the meteorological data of the S
The Global Navigation Satellite System (GNSS) user will benefit a lot from the multi-system fusion positioning in availability, accuracy and reliability. However, the Inter-System Bias (ISB) may weake
The Low earth orbiter(LEO) based navigation signal transmitters has advantages in fast-changing geometry and low free space loss, which can be served as a complementary or extension of current MEO/GEO
The superrefraction, which can be frequently found in the moist lower troposphere, degrades the accuracy of the retrieved atmospheric parameters from GPS/LEO occultation data. The GPS/LEO occultation
In the past 20 years, various innovative technology patents of BeiDou Navigation Satellite System (BDS) emerge in endlessly. Patent analysis is a practical method in enterprise strategy and competitio
At present, Chinas BDS has entered a new era of global networking, and the application industry has shown a rapid development trend. With the rapid development of BDS’ global system construction and i
According to the rare existing researches of RDSS position service of satellite navigation system, this article evaluates RDSS position service performance using the time series analysis method based
The performance of on-board atomic clock directly affects the accuracy of navigation and positioning for users. Evaluating the performance of on-board atomic clock is an important part of the construc
In GNSS/INS integrated navigation, Due to the deep processing to the baseband level of GNSS, the hardware integration is difficult, so most of them are still in the stage of simulation and principle v