BDS-3 phase bias products of new frequency B1C&B2a: ambiguity resolution and positioning accuracy evaluation

ABSTRACTWith the increase of BDS-3 in-orbit time, the number of the new signal ground stations has been gradually enlarged. So we analysed the time series characteristics of B1C&B2a from various perspectives. The two components of the new signal were solved separately, and the sequence continuity of L1X-L5X was found to be poor. The experimental results showed that the ambiguity resolution and position capability of the new signal individually were inferior to those of the old signal; but theconvergence speed and positioning accuracy of BDS(B1C&B2a)+GPS are improved by 26.8% and 44%, respectively, compared with the old signal of fused.KEYWORDS: BDS-3new signalsuncalibrated phase delay (UPD)Observable-specific Signal Bias (OSB)ambiguity resolution (AR) AcknowledgmentsThe authors express great gratitude to CDDIS for providing GNSS products.Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis research is supported by the Key Project of China National Programs for Research and Development (No. 2022YFB3903902; No. 2022YFB3903900); the National Natural Science Foundation of China (No. 42274044; No. 41974010), the Funded by State Key Laboratory of Geo-Information Engineering and Key Laboratory of Surveying and Mapping Science and Geospatial Information Technology of MNR, CASM (No. 2023-01-01), the Wenhai Program of the S&T Fund of Shandong Province for Pilot National Laboratory for Marine Science and Technology (Qingdao) (No. 2021WHZZB1000, No. 2021WHZZB1005), and the Scientific Research Project of Chinese Academy of Surveying and Mapping (No. AR2302; No. AR2202).