Abstract Using the precise ephemeris data from November 2022 for seven consecutive days as a reference, we evaluate and analyze for accuracy the real-time precise products from the 5 organizations(CAS, CNES, GFZ, SHA, and WHU). The experimental results reveal the following: CAS currently provides the highest quantity of real-time precise products for BDS-3 satellites, but the clock accuracy for MEO satellites is the lowest, exceeding 0.4 ns. GFZ’s IGSO satellite products have the poorest quality, with radial orbit errors exceeding 30 cm and clock accuracy greater than 0.8 ns. WHU’s product data quality is best, with radial orbit errors better than 4 cm and clock accuracy of about 0.16 ns, but it has only 19 available satellites. In the positioning domain, we conduct a comparative analysis of real-time precise products from various agencies using dual-frequency, ionosphere-free dynamic real-time Precise Point Positioning(PPP) techniques. The positioning results indicate that the real-time products from CNES, SHA, and WHU exhibit similar levels of positioning accuracy. The overall positioning error in both horizontal and vertical directions is approximately 0.2 meters. Taking into consideration the available number of satellites and the quality of real-time product data, we recommend that real-time PPP users utilize either CNES or SHA’s real-time products.
WANG Tianrun,YUAN Debao,LI Yunzhao et al. Evaluation of Real-Time Precise Orbit and Clock Products for BDS-3 from Different IGS Analysis Centers[J]. jgg, 2024, 44(5): 461-467.
WANG Tianrun,YUAN Debao,LI Yunzhao et al. Evaluation of Real-Time Precise Orbit and Clock Products for BDS-3 from Different IGS Analysis Centers[J]. jgg, 2024, 44(5): 461-467.