18 Result(s)
within
Zongpeng Pan
Geophysics/Geodesy
-
Article
Evaluation of the influence of high-order ionospheric delay on GPS undifferenced and uncombined precise point positioning
High active ionosphere periods have a sizeable ionospheric delay in signal transmission. The high-order ionospheric delay (HOI) severely influences GPS precise point positioning (PPP). The phase-smoothed pseud...
-
Chapter and Conference Paper
Evaluation and Improvement of BDS Dynamic Positioning Performance in the Smartphone
Since Google launched the Android 7.0 operating system, smartphone has opened the original GNSS observation reading interface for the first time, enabling developers to further develop precision positioning an...
-
Chapter and Conference Paper
Performance Evaluation of Galileo Precise Point Positioning
Galileo Satellite Navigation System has been put into trial operation at the end of 2016. Whether Galileo Satellite Navigation System can be used independently for navigation and positioning needs to be analyz...
-
Article
Elevation-dependent pseudorange variation characteristics analysis for the new-generation BeiDou satellite navigation system
To validate the new system design and the new technology of the third-generation BDS (BeiDou-3), five non-GEO experimental satellites were launched during 2015 and 2016. In addition to the B1I and B3I signals ...
-
Chapter and Conference Paper
The Construction Method of Ionospheric Delay Model with Combined BDS Phase and Range Observation
The ionospheric delay model is a reliable method to reduce the influence of ionospheric delay. The phase smoothed pseudorange observations are always used to construct ionospheric delay model. However, the acc...
-
Chapter and Conference Paper
The Analysis of GPS/BDS Ionosphere-Weak Combination SPP Result
Pseudo-code noise amplification theory of ionosphere-free combination is studied in this article, In allusion to the disadvantage of iono-free combination, The balance between the noise reduction and the incom...
-
Chapter and Conference Paper
The Geomagnetic Filtering Algorithm Based on Correlative Probability Density Add-Weight
To overcome the linearizated errors from the state equation and observation equation based on Extended Kalman Filter (EKF), a Unscented Kalman Filter (UKF) matching algorithm using geomagnetic anomaly based on...
-
Chapter and Conference Paper
BDS Multipath Real-Time Estimation Based on Generalized Regression Neural Network
Multipath is the main factor that affects the quality of the pseudo-range observation and the single point positioning. It is difficult to model and weaken the effect of multipath, due to its nonlinear and tim...
-
Chapter and Conference Paper
Fast Computation Method of Real-Time Precise Satellite Clock Errors for Combined BDS/GPS
BeiDou Navigation Satellite System (BDS) had been officially operating since the end of 2012. It can provide service of navigation, timing, and positioning in the Asia-Pacific region. In recent years the preci...
-
Chapter and Conference Paper
Research on Gridding Precision Evaluation Method of Geomagnetic Field Model
With the in-depth research on geomagnetic field model and geomagnetic navigation, the appropriate method of precision evaluation of the geomagnetic field model is required. WMM model and INTERMAGNET observatio...
-
Chapter and Conference Paper
BDS Zero-Difference Zero-Combination Precise Point Positioning Algorithm Study
Because of the characteristics of BDS satellite constellation and the accuracy of satellite orbit and clock error, the initialization time of the traditional ionosphere-free combination precision point positio...
-
Chapter and Conference Paper
Study in BDS Uncombined PPP Ionospheric Delay Estimation and Differential Code Biases
Station-satellite DCB may be absorbed into the ionospheric delay in uncombined PPP resolution because of the direct usage of the precise clock offset production based on the ionosphere-free combination estimat...
-
Chapter and Conference Paper
Integrating BDS and GPS to Accelerate Convergence and Initialization Time of Precise Point Positioning
Due to the precision of BDS orbits and satellites clock, BDS PPP need long time to convergence to centimeter accuracy than GPS PPP. Combined BDS/GPS PPP can benefit from more visible satellites and enhanced sa...
-
Chapter and Conference Paper
Application of Improved LLL Lattice Reduction in BDS Ambiguity Decorrelation
In the process of BDS navigation and positioning, fast and precise ambiguity resolution plays a key role in improving the efficiency and precision of positioning. In cases of highly correlated ambiguities, sin...
-
Chapter and Conference Paper
A New Relative Positioning Method Based on Un-differenced BDS Observation
Aiming at the characteristics of the Beidou satellite navigation system (BDS), we introduce a new relative positioning method based on un-differenced observation. Unlike the relative positioning which always u...
-
Chapter and Conference Paper
A BDS Observation Preprocessing Method Considering the Influence of Frequent Clock Jump
Because of frequent clock jump introduced by the BDS receiver, the continuity of observation series is broken and the validity of slip detection process is undermined. After analyzing the impact mechanism of c...
-
Chapter and Conference Paper
The Method to Inverse PWV Using VMF1 Grid Data
In this paper, the method interpolating Vienna Map** Function (VMF1) grid data to estimate Precipitable Water Vapor (PWV) is introduced. Using precise point positioning technique, the PWV values are estimate...
-
Chapter and Conference Paper
Cycle Slip Detection and Repair with Different Sampling Interval Based on Compass Triple-Frequency
On the basis of the multiple-frequency observation combination theory, the triple-frequency MW and Geometry-free combination and the triple-frequency pseudorange/carrier phase combination cycle-slip detection ...
