A5053438093- GNSS positioning and interference
- Inertial Sensor and Navigation
- Geophysics and Gravity Measurements
- Ionosphere and magnetosphere dynamics
- Indoor and Outdoor Localization Technologies
- Advanced Frequency and Time Standards
- Earthquake Detection and Analysis
- Astronomical Observations and Instrumentation
Technische Universität Berlin
2024-2025
GFZ Helmholtz Centre for Geosciences
2021-2024
Guangzhou Special Pressure Equipment Testing and Research Institute
2017
Wuhan University
2012-2015
Abstract Real-Time Kinematic Precise Point Positioning (PPP–RTK) is inextricably linked to external ionospheric information. The PPP–RTK performances vary much with the accuracy of information, which derived from different network scales, given prior variances, and obtained under disturbed conditions. This study investigates relationships between performances, in terms precision convergence time, statistical results show that Time First Fix (TTFF) for constrained by Global Ionosphere Map...
Abstract Real-time satellite orbit and clock estimations are the prerequisite for Global Navigation Satellite System (GNSS) real-time precise positioning services. To meet high-rate update requirement of corrections, computational efficiency is a key factor challenge due to rapid development multi-GNSS constellations. The Square Root Information Filter (SRIF) widely used in GNSS data processing thanks its high numerical stability efficiency. In estimation, outlier detection elimination...
Abstract Orbit prediction (OP) recently tends to be a very crucial step for supporting real-time GNSS orbit services due the dynamic stability of navigation satellite orbits. The OP performance depends on length predicted orbits and accuracy precise determination (POD) as basis. Considering this, new automatic processing engine is established improving multiple global systems (multi-GNSS) constellation performance. From architecture-oriented high-performance parallel perspective, multi-node...
Precise atmospheric delay and proper constraints are critical for achieving rapid convergence accurate positioning. However, ionospheric models over wide-area face challenges due to significant spatial temporal variations, impacting real-time correction precision. To address this, we propose a novel slant fitting model that adaptively selects the optimal reference path within coverage areas, describing differences between propagation others through trigonometric functions. With ten...
Low-cost GNSS receivers, such as U-Blox, have become a mass-market device used by millions of people every day. Current positioning accuracy few meters with these devices is not precise enough for applications intelligent transportation systems, agriculture and unmanned aerial vehicle (UAV) guidance, which requiring sub-meter to centimeter level accuracy. Real-Time Kinematics (RTK) differential method that can steady offer solutions in real time if dual-frequency geodetic receiver physical...