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Chapter and Conference Paper
BeiDou Satellite Navigation Terminal Effectiveness Evaluation Based on Cloud Theory
With the continuous development of the Beidou satellite navigation system, the Beidou satellite navigation terminal has been transformed from “bus slot + board card” to modularized and chip-based. Its function...
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Article
Open AccessUncombined precise orbit and clock determination of GPS and BDS-3
There is increasing concern about the uncombined (UC) observation model in the field of global navigation satellite system (GNSS). Based on the global positioning system (GPS) and the third-generation BeiDou n...
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Article
Experimental Research on Hole Wall Integrity of TiBw/TC4 Based on Ultrasonic Vibration Assisted Drilling
Titanium Matrix Composites (TMCs) are widely used in aerospace because of their excellent mechanical properties, but it is accompanied by the difficulty of machining. Ultrasonic Vibration Assisted Drilling (UV...
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Article
Open AccessOrbit determination and time synchronization for BDS-3 satellites with raw inter-satellite link ranging observations
To provide competitive global positioning and timing services under the condition that monitoring stations are confined to Chinese territory, inter-satellite link (ISL) technology is used by the third-generati...
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Article
Influence of ingot rocking on the surface quality of multi-wire sawing monocrystalline silicon wafers
This paper aims on slicing of monocrystalline silicon wafers using a newly developed diamond multi-wire reciprocating saw under ingot rocking process. A contact wire length model based on ingot rocking was est...
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Article
Leader-aware community detection in complex networks
Community structures are very common in complex networks. Detecting these communities is important for understanding the hidden features of networks. Besides, each community usually has one leader, which prese...
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Chapter and Conference Paper
Performance Analysis of Multi-GNSS Dynamic Pseudo-range Single Point Positioning
Research on pseudo-range dynamic positioning of 11 signals from the four major satellite navigation systems: GPS, BDS, Galileo and GLONASS by using the ship’s dynamic data in South China Sea. The result shows ...
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Chapter and Conference Paper
Precise Point Positioning Performance Evaluation of QZSS Centimeter Level Augmentation Service
The Japanese Quasi-Zenith Satellite System (QZSS) provides Centimeter-Level Augmentation Service (CLAS) through L6 signal. The L6 augmentation messages includes satellite orbit correction, clock correction, ph...
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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
Influence Analysis of Multi-LEO Augmentation MEO Satellite Orbit Determination Under Regional Station Layout
Since the ground monitoring stations layout for BeiDou navigation satellite system (BDS) is regional, the problem of bad orbit precision of BDS satellites needs to be resolved. Many scholars propose to use the...
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Chapter and Conference Paper
Performance Evaluation of Spaceborne Atomic Clock for BDS-3 Basic System
At present, China’s BDS-3 basic system has been completed and started to provide global services. However, the accuracy of satellite clock difference seriously restricts the service performance of BDS, and the...
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Chapter and Conference Paper
Analysis of Correction Effect of Ionospheric Model During Geomagnetic Storm
Geomagnetic storms are a common natural phenomenon caused by solar activity and other factors, which are closely related to human production activities. In this paper, four ionospheric models during geomagneti...
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Chapter and Conference Paper
Evaluation of BDS Navigation Signals and Positioning Performance on Android Devices
Starting with Android 7.0, Google has opened APIs for smartphone users to obtain raw GNSS data, including pseudorange, carrier, and Doppler measurements. At present, the research of Android devices positioning...
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Chapter and Conference Paper
Simulation Analysis of LEO Satellite Navigation-Augmented Property Based on Beidou-3
Low Earth orbit (LEO) satellites have unique advantages in navigation enhancement due to their high signal strength and rapid geometric changes, has become a hot spot in the field of satellite navigation. Firs...
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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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Article
Map** of QTL for partial resistance to powdery mildew in two Chinese common wheat cultivars
The increasing severity and prevalence of powdery mildew aided by extensive use of semi-dwarf cultivars and high levels of nitrogenous fertilizers are causing significant yield losses in wheat. Resistant culti...
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Article
Computationally efficient dual-frequency uncombined precise orbit determination based on IGS clock datum
Using uncombined (UC) or undifferenced original observations has become a research topic in the global navigation satellite system (GNSS) community. This far, precise orbit determination (POD) with ionospheric...
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Chapter and Conference Paper
Impact of the Ionosphere and GPS Surveying Caused by Coronal Mass Ejection on May 23 2017
We analyzed the disturbance anomaly in the global ionosphere TEC caused by Coronal mass Ejection on May 23, 2017, based on the GPS ionosphere detection technology. Affected by the Coronal mass Ejection toward ...
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Chapter and Conference Paper
Performance Evaluation of Beidou-3 On-Board Atomic Clock
The performance of on-board atomic clock directly affects the accuracy of navigation and positioning for users. Evaluating the performance of on-board atomic clock is an important part of the construction and ...
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Chapter and Conference Paper
Precision Analysis of BDS-3 Satellite Orbit by Using SLR Data
The accuracy of satellite ephemeris directly affects the accuracy of navigation and positioning. The BDS-3 under construction in China is based on the BDS-2 system, and the Beidou global satellite navigation s...
