GNSS

AI Foundation Models Facilitate Real-time Global GNSS Precipitable Water Vapor Retrieval with Sub-millimeter Accuracy
Currently, over 20,000 Global Navigation Satellite Systems (GNSS) stations are installed worldwide to provide tropospheric delay …
Junsheng Ding, Wu Chen, Junping Chen*, Jungang Wang, Yize Zhang, Duojie Weng, Tong Liu, Xiaolong Mi, Benedikt Soja, Lei Bai
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Equalization of Frequency Domain Adaptive Filter (FDAF) Using Signal Prediction Aided Reference Spectrum Model (SPRSM)
Filtering jamming signals from intermediate-frequency data is a widely used method for global navigation satellite system anti-jamming. …
Mengyu Ding, Xiaolong Mi, Wu Chen, Duojie Weng, Weihao Ding
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Absolute and relative POD of LEO satellites in formation flying: Undifferenced and uncombined approach
Absolute or relative precise orbit determination (POD) is essential for many low Earth orbit (LEO) missions and typically relies on …
Xiaolong Mi*, Amir Allahvirdi-Zadeh, Ahmed El-Mowafy, Zhiyong Huang, Kan Wang, Baocheng Zhang, Yunbin Yuan
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Undifferenced and uncombined GNSS time and frequency transfer with integer ambiguity resolution
Precise point positioning (PPP) has been a competitive global navigation satellite system (GNSS) technique for time and frequency …
Xiaolong Mi, Baocheng Zhang*, Ahmed El-Mowafy, Kan Wang, Yunbin Yuan
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A method of real-time long-baseline time transfer based on the PPP-RTK
Long-baseline time transfer can reach high frequency stability based on post-processed batch least-squares adjustment using precise …
Kan Wang*, Baoqi Sun, Weijin Qin, Xiaolong Mi, Ahmed El-Mowafy, Xuhai Yang
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On the potential of undifferenced and uncombined GNSS time and frequency transfer with integer ambiguity resolution and satellite clocks estimated
The use of global navigation satellite systems (GNSS) is a competitive way to provide high-precision and low-cost time and frequency …
Xiaolong Mi, Baocheng Zhang*, Ahmed El-Mowafy, Kan Wang, Yunbin Yuan
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Undifferenced and Uncombined GNSS Time Transfer and its Space Applications
This thesis investigates high-precision GNSS time transfer using undifferenced and uncombined (UDUC) observation models and explores …
Xiaolong Mi
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Characteristics of the short-term temporal variations of multi-constellation and multi-frequency GNSS receiver differential phase biases
Multi-frequency and multi-constellation global navigation satellite system (GNSS) signals bring opportunities and challenges for GNSS …
Xiaolong Mi, Yunbin Yuan, Baocheng Zhang
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Characteristics of receiver-related biases between BDS-3 and BDS-2 for five frequencies including inter-system biases, differential code biases, and differential phase biases
It is foreseeable that the BeiDou navigation satellite system with global coverage (BDS-3) and the BeiDou navigation satellite regional …
Xiaolong Mi, Chuanzhen Sheng, Ahmed El-Mowafy, Baocheng Zhang*
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On the temperature sensitivity of multi-GNSS intra- and inter-system biases and the impact on RTK positioning
The intra-system biases, including differential code biases (DCBs) and differential phase biases (DPBs), are generally defined as …
Xiaolong Mi, Baocheng Zhang*, Robert Odolinski, Yunbin Yuan
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