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  1. Article

    Open Access

    Molecular basis for DNA cleavage by the hypercompact Cas12j-SF05

    Zhiqiang Duan, ** Zhang, Jun-Tao Zhang, Shanshan Li, Ruiheng Liu, Jie Sun in Cell Discovery (2023)

  2. No Access

    Article

    Real-time tropospheric delay map retrieval using sparse GNSS stations

    Global Navigation Satellite System (GNSS) is one of the popular approaches for zenith tropospheric delay (ZTD) retrieval due to its advantages of high precision and high temporal resolution. However, obtaining...

    Zheng Du, Qingzhi Zhao, Yibin Yao, Hang Zhu in GPS Solutions (2023)

  3. No Access

    Article

    A high-precision ZTD interpolation method considering large area and height differences

    The existing methods for retrieving high-spatial resolution zenith tropospheric delay (ZTD), such as interpolation and fitting methods, are not suitable for large areas and large height differences. A high-pre...

    Qingzhi Zhao, Wei Wang, Zufeng Li, Zheng Du, Pengfei Yang, Wanqiang Yao in GPS Solutions (2023)

  4. No Access

    Article

    An improved GNSS tropospheric tomography method with the GPT2w model

    The GNSS tropospheric tomography technique has been proven to be a powerful tool for three-dimensional water vapor reconstruction. In most previous studies, the signals leaving the side face of the tomography ...

    Qingzhi Zhao, Wanqiang Yao, Yibin Yao, **n Li in GPS Solutions (2020)

  5. No Access

    Chapter and Conference Paper

    High Temporal Resolution of PWV Acquisition Method and Its Preliminary Application in Yunnan

    Rapid variation of atmospheric water vapor is important to the regional hydrologic cycle and climate change. Due to the lack of high temporal resolution precipitable water vapor data, it is tough to monitor th...

    Pengfei Yang, Qingzhi Zhao, Wanqiang Yao in China Satellite Navigation Conference (CSN… (2020)

  6. No Access

    Chapter and Conference Paper

    An Improved Method of ZTD Model in Yunnan Province Based on GPT2w Model

    The GPT2w model is one of the currently disclosed high-precision empirical models of tropospheric key parameters. The model can provide a variety of meteorological parameters, and the ZTD can be calculated usi...

    Zheng Du, Qingzhi Zhao, Wanqiang Yao in China Satellite Navigation Conference (CSN… (2020)

  7. Article

    Open Access

    Short-term rainfall forecast model based on the improved BP–NN algorithm

    The existing methods have been used the Zenith Total Delay (ZTD) or Precipitable Water Vapor (PWV) derived from Global Navigation Satellite System (GNSS) for rainfall forecasting. However, the occurrence of ra...

    Yang Liu, Qingzhi Zhao, Wanqiang Yao, **ongwei Ma, Yibin Yao in Scientific Reports (2019)

  8. No Access

    Article

    Performance analysis of indoor pseudolite positioning based on the unscented Kalman filter

    The indoor pseudolite (PL) code-based solution is not sufficiently precise, and conducting prolonged static carrier phase observations is impractical due to the static PL geometric distribution. Thus, a high-p...

    **n Li, Peng Zhang, Guanwen Huang, Qin Zhang, Jiming Guo, Yinzhi Zhao in GPS Solutions (2019)

  9. No Access

    Article

    A new troposphere tomography algorithm with a truncation factor model (TFM) for GNSS networks

    For previous studies of global navigation satellite system (GNSS) troposphere tomography, only the GNSS observations derived from ground-based stations located inside the tomographic area were considered; howe...

    Qingzhi Zhao, Kefei Zhang, Yibin Yao, **n Li in GPS Solutions (2019)

  10. No Access

    Article

    A modified three-dimensional ionospheric tomography algorithm with side rays

    The three-dimensional ionospheric tomography (3DCIT) algorithm based on Global Navigation Satellite System (GNSS) observations have been developed into an effective tool for ionospheric monitoring in recent ye...

    Yibin Yao, Changzhi Zhai, Jian Kong, Qingzhi Zhao, Cunjie Zhao in GPS Solutions (2018)

  11. No Access

    Article

    A new GPS/BDS tropospheric delay resolution approach for monitoring deformation in super high-rise buildings

    A new approach for deformation monitoring of super high-rise building using GPS/BDS technology is proposed for the case when prior coordinates are known and the baseline is short but has a large height differe...

    **n Li, Guanwen Huang, Qin Zhang, Qingzhi Zhao in GPS Solutions (2018)

  12. Article

    Open Access

    Real-time precise point positioning-based zenith tropospheric delay for precipitation forecasting

    GPS-based Zenith Tropospheric Delay (ZTD) estimation should be easily obtained in a cost-effective way, however, the most previous studies focus on post-processed ZTD estimates using satellite orbit and clock ...

    Qingzhi Zhao, Yibin Yao, Wanqiang Yao, Zufeng Li in Scientific Reports (2018)

  13. No Access

    Chapter and Conference Paper

    A Troposphere Tomography Method by Combining the Truncation Coefficient and Variance Component Analysis

    Traditional troposphere tomography method cannot use the GNSS signals penetrating from the side face of research area, which not only decreases the utilization rate of GNSS observation but also leads to a low ...

    Qingzhi Zhao, Yibin Yao, Linyang **n in China Satellite Navigation Conference (CSN… (2018)

  14. Article

    Open Access

    Establishing a method of short-term rainfall forecasting based on GNSS-derived PWV and its application

    Global Navigation Satellite System (GNSS) can effectively retrieve precipitable water vapor (PWV) with high precision and high-temporal resolution. GNSS-derived PWV can be used to reflect water vapor variation...

    Yibin Yao, Lulu Shan, Qingzhi Zhao in Scientific Reports (2017)

  15. No Access

    Article

    A novel, optimized approach of voxel division for water vapor tomography

    Water vapor information with highly spatial and temporal resolution can be acquired using Global Navigation Satellite System (GNSS) water vapor tomography technique. Usually, the targeted tomographic area is d...

    Yibin Yao, Qingzhi Zhao in Meteorology and Atmospheric Physics (2017)

  16. No Access

    Chapter and Conference Paper

    The Research on Four-Dimensional Water Vapor Tomography Based on Real-Time PPP Technique

    With the development of International GNSS Service (IGS) real-time pilot project (RTPP) acquiring precipitable water vapor (PWV) with high accuracy has become a reality based on the real-time precise point poi...

    Qingzhi Zhao, Yibin Yao, Chaoqian Xu in China Satellite Navigation Conference (CSN… (2016)