Ionospheric Effect Mitigation for Real-Time Single-Frequency Precise Point Positioning

Chen, Kongzhe; Gao, Yang

doi:10.1002/j.2161-4296.2008.tb00430.x

Cited by 9 publications

(7 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Based on predicted GIM, real-time single-frequency PPP has also been developed with a positioning accuracy of several decimetres (van Bree et al, 2009; van Bree and Tiberius, 2011). Instead of using the GIM model, an ionospheric estimation model that takes ionospheric gradients into account has also been used for real-time single-frequency PPP at a comparable accuracy level (Chen and Gao, 2005; Gao et al, 2006). In summary, the present single-frequency PPP technique can achieve only metre to several decimetres accuracy if ionospheric models are used to mitigate the ionospheric effect.…”

Section: Introductionmentioning

confidence: 99%

Single-frequency Ionosphere-free Precise Point Positioning Using Combined GPS and GLONASS Observations

2013

View full text Add to dashboard Cite

Single-frequency Precise Point Positioning (PPP) using a Global Navigation Satellite System (GNSS) has been attracting increasing interest in recent years due to its low cost and large number of users. Currently, the single-frequency PPP technique is mainly implemented using GPS observations. In order to improve the positioning accuracy and reduce the convergence time, we propose the combined GPS/GLONASS Single-Frequency (GGSF) PPP approach. The approach is based on the GRoup And PHase Ionospheric Correction (GRAPHIC) to remove the ionospheric effect. The performance of the GGSF PPP was tested using both static and kinematic datasets as well as different types of precise satellite orbit and clock correction data, and compared with GPS-only and GLONASS-only PPP solutions. The results show that the GGSF PPP accuracy degrades by a few centimetres using rapid/ultrarapid products compared with final products. For the static GGSF PPP, the position filter typically converges at 71, 33 and 59 minutes in the East, North and Up directions, respectively. The corresponding positioning accuracies are 0·057, 0·028 and 0·121 m in the East, North and Up directions. Both positioning accuracy and convergence time have been improved by approximately 30% in comparison to the results from GPS-only or

show abstract

Section: Introductionmentioning

confidence: 99%

Single-frequency Ionosphere-free Precise Point Positioning Using Combined GPS and GLONASS Observations

2013

View full text Add to dashboard Cite

show abstract

“…The ionosphere remains a major bias for single frequency PPP that may be eliminated with a group and phase ionospheric calibration (GRAPHIC) linear combination [ 24 ]. However, because the noise level of GRAPHIC combination is dominated by the code observation noise, the position coordinate and ambiguity parameters therefore cannot be determined using a single epoch of observations due to the rank-deficient issue [ 25 , 26 ]. An estimation process using cumulative observations has to be applied and a long time period of 2–4 h are also required for the float ambiguity parameters to converge [ 27 ].…”

Section: Observation Error Correctionmentioning

confidence: 99%

“…Since the ionosphere delay is the dominant error, a more precise characterization model is positive to suppress the ionospheric error. It has been proven that the ionospheric error can be modeled by tilting the zenith of ionosphere to estimate the ionospheric gradients along with zenith delay [ 25 ]:

where d ion is the ionospheric correction obtained from SBAS. e is the elevation angle and α is the azimuth angle.…”

Section: Observation Error Correctionmentioning

confidence: 99%

Real-Time Single Frequency Precise Point Positioning Using SBAS Corrections

Chun

Zhao

et al. 2016

Sensors

View full text Add to dashboard Cite

Real-time single frequency precise point positioning (PPP) is a promising technique for high-precision navigation with sub-meter or even centimeter-level accuracy because of its convenience and low cost. The navigation performance of single frequency PPP heavily depends on the real-time availability and quality of correction products for satellite orbits and satellite clocks. Satellite-based augmentation system (SBAS) provides the correction products in real-time, but they are intended to be used for wide area differential positioning at 1 meter level precision. By imposing the constraints for ionosphere error, we have developed a real-time single frequency PPP method by sufficiently utilizing SBAS correction products. The proposed PPP method are tested with static and kinematic data, respectively. The static experimental results show that the position accuracy of the proposed PPP method can reach decimeter level, and achieve an improvement of at least 30% when compared with the traditional SBAS method. The positioning convergence of the proposed PPP method can be achieved in 636 epochs at most in static mode. In the kinematic experiment, the position accuracy of the proposed PPP method can be improved by at least 20 cm relative to the SBAS method. Furthermore, it has revealed that the proposed PPP method can achieve decimeter level convergence within 500 s in the kinematic mode.

show abstract

“…This is largely driven by the fact that the majority of GNSS applications are based on low-cost single-frequency receivers. Such efforts have already brought significant progress in methodology and product development of single-frequency precise point positioning based on precise correction data from the International GNSS Service (IGS) as well as Satellite-based Augmentation Systems (SBAS) (Chen and Gao 2008;Zhang and Lee 2008;Van Bree et al 2009). Further, there is a great potential to significantly improve positioning accuracy with cheap GNSS chipsets.…”

Section: Ppp For Single-frequency Receiversmentioning

confidence: 99%

Geodetic Sensor Systems and Sensor Networks: Positioning and Applications

Verhagen

Grejner‐Brzezinska

Retscher

et al. 2011

International Association of Geodesy Symposia

Self Cite

View full text Add to dashboard Cite

This contribution focuses on geodetic sensor systems and sensor networks for positioning and applications. The key problems in this area will be addressed together with an overview of applications. Global Navigation Satellite Systems (GNSS) and other geodetic techniques play a central role in many applications like engineering, mapping and remote sensing. These techniques include precise positioning, but also research into non-positioning applications like atmospheric sounding using continuously operating GNSS networks. An important research area is multi-sensor system theory and applications to airborne and land-based platforms, indoor and pedestrian navigation, as well as environmental monitoring. The primary sensors of interest are GNSS and inertial navigation systems. Furthermore, Interferometric Synthetic Aperture Radar (InSAR) is recognized as one of the most important state-of-the-art geodetic technologies used for generation of Digital Elevation Models and accurately measuring ground deformations. Keywords Current research issues • GNSS • InSARS. Verhagen ( ) DEOS,

show abstract

Ionospheric Effect Mitigation for Real-Time Single-Frequency Precise Point Positioning

Cited by 9 publications

References 15 publications

Single-frequency Ionosphere-free Precise Point Positioning Using Combined GPS and GLONASS Observations

Single-frequency Ionosphere-free Precise Point Positioning Using Combined GPS and GLONASS Observations

Real-Time Single Frequency Precise Point Positioning Using SBAS Corrections

Geodetic Sensor Systems and Sensor Networks: Positioning and Applications

Contact Info

Product

Resources

About