Mitigation of Ionospheric Delay in GPS/BDS Single Frequency PPP: Assessment and Application

Li, Zishen; Fan, Lei; Yuan, Yunbin; Verhagen, Sandra; Bakker, Peter de; Yuan, Hong; Su, Zhong

doi:10.1007/978-3-642-54743-0_39

Cited by 3 publications

(3 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although STEC variation along the propagation paths between GNSS user and different satellites can be rather complicated, the STEC values observed from one satellite on a continuous observation arc are usually quite smooth for a network within dozens to hundreds of kilometers. Therefore, ionospheric STEC delay can be modeled and corrected satellite-by-satellite with Satellite-based Ionospheric Model (SIM) (Li et al 2014a) established for every single satellite in a regional or local GNSS network. As ionospheric TEC is highly homogenous and correlated for a small coverage in a short period, a low-order polynomial function can be adopted for STEC modeling.…”

Section: Methodsmentioning

confidence: 99%

“…Many mathematical functions have been used for VTEC representation on global and regional scales, and there is much research on their performance analysis and comparison (Santis et al 1999;Li et al 2019). However, with an increasing number of densely distributed GNSS reference stations, it is found that the accuracy of different ionospheric VTEC modeling functions is basically equivalent when the elevation mask is 15 degrees and above (Li et al 2014a).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A satellite-based method for modeling ionospheric slant TEC from GNSS observations: algorithm and validation

Lei

Wang

et al. 2021

GPS Solut

Self Cite

View full text Add to dashboard Cite

Total Electron Content (TEC) modeling is critical for Global Navigation Satellite System (GNSS) users to mitigate ionospheric delay errors. The mapping function is usually used for Vertical TEC ionospheric correction models for slant and vertical TEC conversion. But the mapping function cannot characterize TEC variation in different azimuths between the user and satellites. The ionospheric modeling error resulting from the mapping function tends to be bigger in middle and low latitudes. Therefore, a new algorithm for ionospheric Slant TEC (STEC) modeling with Satellite-based Ionospheric Model (SIM) is proposed in this contribution. Validation tests are carried out with GNSS observation data from the Crustal Movement Observation Network of China during different solar activities and in different seasons. The performance of SIM is compared with that of several commonly-used Global Ionospheric Map (GIM) and Regional Ionospheric Map (RIM) products. The results show that the STEC bias and STD of SIM are within 1.0 TECU and about 2.0 TECU, respectively, and SIM can correct over 90% STEC RMS errors, outperforming the GIM and RIM products. Consequently, the SIM algorithm can be a new option for high-accuracy ionospheric delay correction in regional and local GNSS networks.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A satellite-based method for modeling ionospheric slant TEC from GNSS observations: algorithm and validation

Lei

Wang

et al. 2021

GPS Solut

Self Cite

View full text Add to dashboard Cite

show abstract

“…I z is the zenith delay, g n and g e are the horizontal gradients in the north and east directions, respectively. M F is the mapping function and can be computed as M F = [1−cos 2 e/(1+ h / R ) 2 ] −1/2 , in which R is the mean radius of the Earth and h is the average height of the ionosphere layer [ 28 ]. The uncertainty of ionospheric error is modeled as a function of variance of ionospheric delay at the IGPs [ 20 ].…”

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

Investigation on data processing method in multi antenna GPS system designed for landslide

Yuan¹,

Huang²,

Yu³

et al. 2015

Teh. vjesn.

View full text Add to dashboard Cite

Original scientific paper The global positioning system (GPS) is a satellite navigation system in the middle distance circular orbit. It can provide accurate positioning, speed testing, and high precision time standard in most parts of the earth's surface. Position can be quickly determined with only 3 satellites, but if want more accurate location, more satellites should be coupled. The conventional GPS monitoring method for deformation is that the GPS receiver is installed in each monitoring point. When there are many monitoring points, cost of the monitoring system will be quite high. In order to solve this problem, multi antenna GPS monitoring system has been proposed. Multiple antennas are connected to a receiver according to an additional GPS signal switch. So the data obtained in the system will be much larger than by the conventional GPS system. How to effectively process the large amount of data is a difficult problem. In this paper, the main content is to study the data processing method for a multi antenna GPS. Data compression method in a multi antenna GPS system with a high sampling rate is investigated. Data effective degree is used in the method to extract useful information. GPS data is coded by multi coding methods. According to the verification, the results show that the method is valid, and it can be used in the GPS data compression. Keywords: code method; data compression; deformation; multi antenna GPS system; side slope Analiza metode obrade podataka GPS sustava s više antena konstruiranog za klizištaIzvorni znanstveni članak Globalni pozicionirajući sustav (GPS) je satelitski navigacijski sustav u kružnoj putanji srednje udaljenosti. Osigurava točno pozicioniranje, ispitivanje brzine i vrlo precizno vrijeme u većini dijelova zemljine površine. Položaj je moguće brzo odrediti sa samo 3 satelita, ali ako želimo točniju lokaciju, potrebno je spojiti više satelita. Uobičajena GPS metoda praćenja deformacija sastoji se u postavljanju GPS prijemnika u svakoj kontrolnoj točki. Kad ima mnogo kontrolnih točki, trošak kontrolnog sustava bit će također prilično visok. Za rješavanje ovog problema predlaže se GPS kontrolni sustav s više antena. Višestruke antene su povezane s prijemnikom preko dodatnog prekidača GPS signala. Tako će podaci prikupljeni u sustav biti mnogo veći nego pomoću uobičajenog GPS sustava. Veliki je problem kako učinkovito obraditi veliku količinu podataka. Bit je ovoga rada proučiti metodu obrade podataka za GPS s više antena. Istražuje se metoda sabijanja podataka u GPS sustavu s više antena za brzo uzimanje

show abstract

Mitigation of Ionospheric Delay in GPS/BDS Single Frequency PPP: Assessment and Application

Cited by 3 publications

References 28 publications

A satellite-based method for modeling ionospheric slant TEC from GNSS observations: algorithm and validation

A satellite-based method for modeling ionospheric slant TEC from GNSS observations: algorithm and validation

Real-Time Single Frequency Precise Point Positioning Using SBAS Corrections

Investigation on data processing method in multi antenna GPS system designed for landslide

Contact Info

Product

Resources

About