12 Result(s)
within
Rengui Ruan
Aerospace Technology and Astronautics
Geophysics/Geodesy
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Chapter and Conference Paper
BDS-3 Onboard Atomic Clock Performance Evaluation
In order to evaluate the performance of the onboard atomic clock of BDS-3, mult-GNSS observation of the global distributed iGMAS and IGS/MGEX stations are collected, and the BDS/GPS combined precise orbit dete...
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Chapter and Conference Paper
A New Ambiguity Resolution Method Applied to Uncombined Precise Orbit Determination
With the continuous refinement of multi-GNSS and multi-frequency data processing, there is an increasing interest for the observation model based on uncombined (UC) strategy. Ambiguity resolution is an import...
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Chapter and Conference Paper
A Method of Combined Orbit Determination of Multi-source Data with Modified Helmert Variance Component Estimation
The application of inter-satellite link technology, the rise of low-orbit satellite enhancement constellation and the maturity of on-borne GNSS orbit determination technology provide a new method for precise ...
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Chapter and Conference Paper
Positioning and Velocity Performance Evaluation of Transponding System
This paper introduces the work principle and positioning performance of the transponding navigation system, and gives the navigation and positioning measurement equations. Using two consecutive days of data fr...
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Chapter and Conference Paper
Estimation, Validation, and Application of 30-s GNSS Clock Corrections
High-rate precise satellite clock corrections are essential for precise point positioning (PPP) with global navigation satellite system (GNSS), especially for kinematic PPP (KPPP) for low earth orbiting satell...
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Chapter and Conference Paper
Ambiguity Fixing for Kinematic PPP with Integer Phase Clock
The implementation of precise point positioning ambiguity fixing depends on the products which can be used to recover the characteristics of ambiguity by the service side. When users need to implement single d...
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Chapter and Conference Paper
Precise Orbit Determination of Navigation Satellite Using Joint Data from Regional Tracking Station and LEO
The precision of orbit determination for navigation satellites with regional distributed stations may be improved by introducing onboard GNSS observation data. The method of orbit determination combining the o...
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Chapter and Conference Paper
Relative Positioning with Undifferenced Observations: Concept and Application/Experiments with BDS
This paper reviews the history and evolution of the relative positioning based on the undifferenced (UD) observation. The internal mechanism of this method is explained by error division, that is, adopting the...
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Chapter and Conference Paper
Experiment and Result of Precise Kinematic Orbit Determination for LEO Satellite
Function for LEO kinematic orbit determination was developed and integrated into the SPODS software, which has been designed and developed at **. This paper prese...
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Chapter and Conference Paper
Analysis of Ionosphere Modeling Accuracy Based on Multi-GNSS Data
Satellite navigation has stepped into the era of multi-GNSS and multi-frequencies; it has brought new opportunities for ionosphere modeling. This paper studied the methods and principles of ionosphere modeling...
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Chapter and Conference Paper
SPODS Software and Its Result of Precise Orbit Determination for GNSS Satellites
The Satellite Positioning and Orbit Determination System (SPODS) is a tool for data analysis of global navigation satellite systems such as GPS, BeiDou, GLONASS, and Galileo. It has being designed and develope...
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Chapter and Conference Paper
Estimation of Crosslink Equipment Delay and Its Contribution to GNSS Orbit Determination and Time Synchronization
Considering equipment delay, measurement equations combining GNSS pseudorange, carrier phase and crosslink range observations are presented. It is revealed that the equipment delay of crosslink payload appears...
