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Effects of BDS flex power on DCB estimation and PPP convergence

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Abstract

The flex power technology of satellite navigation systems can improve the anti-jamming ability of navigation signals, but the flex power technology may have many effects in navigation and positioning. In this paper, the effects of the BeiDou Navigation Satellite System (BDS) flex power on differential code biases (DCBs) estimation and precise point positioning (PPP) convergence were researched. First, the variation characteristics of the carrier-to-noise density ratio and daily DCB products during BDS flex power active periods were analyzed. Then, the influence of BDS flex power on DCB estimation was examined by different DCB estimation strategies. Finally, the convergence performance of PPP algorithms using different DCB corrections during BDS flex power active periods was investigated. Results show the B3I signals of the BDS-2 Geostationary Orbit (GEO), Medium Earth Orbit (MEO), and Inclined Geosynchronous Orbit (IGSO) satellites have the capability of flex power. The BDS observation data during flex power events that occurred on DOY 029 in 2021 were analyzed. Estimates derived from reference satellite constraint indicate that the DCB of the satellites without flex power activated did not change, whereas the DCB of the IGSO satellites with flex power activated increased by 10–15 ns. When the flex power was activated at part of the DOY 029, 2021, the correction of daily DCB products resulted in the extension of BDS PPP convergence time for most stations within the flex power coverage area, regardless of whether the flex power was activated; however, the convergence time of PPP was unaffected if the station was outside the flex power coverage area.

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Data availability

The GNSS datasets analyzed during the current study are available from ftp://cddis.gsfc.nasa.gov/pub/.

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Acknowledgements

We acknowledge CAS and DLR for providing DCB products (https://cddis.nasa.gov/archive/gnss/products/bias). We acknowledge IGS for providing the station data (https://cddis.nasa.gov/archive/gnss). We are grateful to the reviewers for their assistance in evaluating this paper.

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Authors and Affiliations

  1. School of Land Science and Technology, China University of Geosciences (Beijing), 29 Xueyuan Road, Haidian District, Beijing, 100083, China

    Zhou Wu, Shuhui Li, Ming Ji, Pengrui Mao & Shaojie Xiong

  2. China Satellite Network Innovation Co., Lid, No.5 Anding Road, Chaoyang District, Beijing, 100029, China

    Hongxia Wan

Authors
  1. Zhou Wu
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  2. Shuhui Li
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  3. Hongxia Wan
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  4. Ming Ji
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  5. Pengrui Mao
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  6. Shaojie Xiong
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Contributions

ZW and SL contributed to the conception of the study. WZ and SL contributed significantly to the data analysis and manuscript preparation. HW and MJ wrote part of the manuscript. PM and SX contributed to some data analysis work.

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Correspondence to Shuhui Li.

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Wu, Z., Li, S., Wan, H. et al. Effects of BDS flex power on DCB estimation and PPP convergence. GPS Solut 28, 41 (2024). https://doi.org/10.1007/s10291-023-01581-8

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