The Journal of Global Positioning Systems
1446-3164
Cơ quản chủ quản: N/A
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Các bài báo tiêu biểu
Regional ionospheric modeling using wavelet network model
Tập 15 - Trang 1-10 - 2017
A major error component of Global Positioning System (GPS) is the ionospheric delay. Ionopspheric error can be reduced by a dual frequency receiver using a linear combination technique that can not be applied with a single frequecy receiver. However, an accurate ionospheric error modeling for single-frequency receiver is required. Due to the nonlinearity of the ionospheric error, a highly nonlinea...... hiện toàn bộ
An assessment of the interoperability of PPP-AR network products
Tập 15 - Trang 1-12 - 2017
Integer ambiguity resolution of carrier-phase measurements from a single receiver can be implemented by applying additional satellite corrections (products) to mitigate unmodelled satellite equipment delays. Interoperability of different PPP-AR products would allow the PPP user to transform independently generated PPP-AR products to obtain multiple fixed solutions of comparable precision and accur...... hiện toàn bộ
Adaptive cubature Kalman filter based on the variance-covariance components estimation
Tập 15 - Trang 1-9 - 2017
Although the Kalman filter (KF) is widely used in practice, its estimated results are optimal only when the system model is linear and the noise characteristics of the system are already exactly known. However, it is extremely difficult to satisfy such requirement since the uncertainty caused by the inertial instrument and the external environment, for instance, in the aided inertial navigation. I...... hiện toàn bộ
Review of triple-frequency GNSS: ambiguity resolution, benefits and challenges
Tập 16 - Trang 1-11 - 2018
Triple-frequency GNSS has been intensively studying in the past decades, especially with the open service of China’s BeiDou system. In this review, we will address the ambiguity resolution, benefits gained from additional frequency signals compared to the dual-frequency GNSS signals, as well as analyse the challenges of triple-frequency GNSS for future development. We first review and compare the ...... hiện toàn bộ
BDS code bias periodical mitigation by low-pass filtering and its applications in precise positioning
Tập 16 - Trang 1-12 - 2018
The code-phase divergences, which are minimal for GPS, GLONASS, and Galileo satellites, are commonly found in BeiDou Navigation Satellite System (BDS) Geostationary Orbit (GEO), Inclined GeoSynchronous Orbit (IGSO) and Medium Earth Orbit (MEO) satellites. Several precise positioning applications which use code observations are severely affected by these code biases. We present an analysis of code ...... hiện toàn bộ
Camera auto-calibration in GPS/INS/stereo camera integrated kinematic positioning and navigation system
Tập 14 - Trang 1-15 - 2016
This paper presents a novel two-step camera calibration method in a GPS/INS/Stereo Camera multi-sensor kinematic positioning and navigation system. A camera auto-calibration is first performed to obtain for lens distortion parameters, up-to-scale baseline length and the relative orientation between the stereo cameras. Then, the system calibration is introduced to recover the camera lever-arms, and...... hiện toàn bộ
A posteriori estimation of stochastic model for multi-sensor integrated inertial kinematic positioning and navigation on basis of variance component estimation
Tập 14 - Trang 1-12 - 2016
Improving a priori stochastic models of the process and measurement noise vectors in Kalman Filer (KF) has always been a challenge. As one preferable technique to address this challenge, the variance component estimation (VCE) applied on the Kalman Filter’s process and measurement noise covariance matrix (Q & R) has been proved in plenty of applications. Unsurprisingly, VCE was expected to re-esta...... hiện toàn bộ
Development of a GPS spoofing apparatus to attack a DJI Matrice 100 Quadcopter
Tập 16 - Trang 1-11 - 2018
Global Positioning System (GPS) Spoofing attacks threaten technologies that our modern society depends on. To successfully develop defensive mechanisms against these attacks, methods to model the attacks and subsequently distinguish them from normal GPS operation must be developed. This paper primarily details the step-by-step implementation of a low-cost GPS spoofing and high-level spoofing data ...... hiện toàn bộ
Accuracy analysis of GPS/BDS relative positioning using zero-baseline measurements
Tập 16 - Trang 1-8 - 2018
This paper focuses on assessing the precision of carrier phase relative positioning using GPS-only, BDS-only and GPS/BDS measurements. A zero baseline is used in order to achieve this. Software for GPS and BDS processing has been developed, allowing static and kinematic data processing, as well as the combined GPS and BDS processing. Ionospheric and tropospheric delays are significantly reduced by...... hiện toàn bộ