Impact and Implementation of Higher‐Order Ionospheric Effects on Precise GNSS Applications

  title={Impact and Implementation of Higher‐Order Ionospheric Effects on Precise GNSS Applications},
  author={Tomasz Hadas and Anna Krypiak-Gregorczyk and Manuel Hern{\'a}ndez‐Pajares and Jan Kaplon and Jacek Paziewski and Paweł Wielgosz and Alberto Garc{\'i}a‐Rigo and Kamil Kaźmierski and Krzysztof Sośnica and Dawid Kwasniak and Jan Sierny and Jarosław Bosy and Mateusz Pucilowski and Robert Szyszko and K. Portasiak and Germ{\'a}n Olivares-Pulido and Tamara L. Gulyaeva and Raul Orus P{\'e}rez},
  journal={Journal of Geophysical Research: Solid Earth},
  pages={9420 - 9436}
High precision Global Navigation Satellite Systems (GNSS) positioning and time transfer require correcting signal delays, in particular higher‐order ionospheric (I2+) terms. We present a consolidated model to correct second‐ and third‐order terms, geometric bending and differential STEC bending effects in GNSS data. The model has been implemented in an online service correcting observations from submitted RINEX files for I2+ effects. We performed GNSS data processing with and without including… 
Effect analysis of higher-order ionospheric corrections on quad-constellation GNSS PPP
With the development of global navigation satellite system (GNSS) precise point positioning (PPP) technology, higher positioning accuracy is required in some applications. An important error source
The Effects of Higher-Order Ionospheric Terms on GPS Tropospheric Delay and Gradient Estimates
The results of numerical experiments show that HOI effects have a significant impact on the estimated tropospheric parameters, and the influence is dependent on location and time.
Evaluation of the Effect of Higher-Order Ionospheric Delay on GPS Precise Point Positioning Time Transfer
This study quantitatively analyzes the errors caused by higher-order ionospheric (Ion2+) delays in precise PPP time transfer and concludes that the Ion2+ correction is necessary for high-precision P PP time transfer over long time-links, especially time- links made by one station located in the northern hemisphere and another location in the south hemisphere.
The impact of second-order ionospheric delays on the ZWD estimation with GPS and BDS measurements
Since millimeter accuracy is required in many GNSS applications such as real-time zenith wet delay (ZWD) estimation, the higher-order ionospheric delays on GNSS signals are no longer negligible. We
Impact of semi-annual ionospheric total electron content variation on station displacements using single-frequency PPP
Global Positioning System (GPS) station displacements in this work are derived using the so-called precise point positioning (PPP) technique with low-cost singlefrequency (SF) receivers. In the SF
Network Effects and Handling of the Geocenter Motion in Multi‐GNSS Processing
Both, the network configuration and the way of terrestrial reference frame (TRF) realization, affect the global geodetic products delivered from the Global Navigation Satellite Systems (GNSS) data
Characteristics of higher order ionospheric effects on GNSS observations: Monitoring using IGS network
  • R. Ghoddousi-Fard
  • Physics
    2019 URSI Asia-Pacific Radio Science Conference (AP-RASC)
  • 2019
The ionospheric refractive index equation along the GNSS ray path includes second and third order terms. These as well as geometric and slant Total Electron Content (TEC) difference ray bending
Effect of Higher-Order Ionospheric Delay on Precise Orbit Determination of GRACE-FO Based on Satellite-Borne GPS Technique
The orbit precision of GRACE-FO can be improved by adding higher-order ionospheric delay, with improvement order of sub-millimeter level, according to the results of this paper.
An SBAS Integrity Model to Overbound Residuals of Higher-Order Ionospheric Effects in the Ionosphere-Free Linear Combination
This work proposes and justifies an overbounding model for residual ionospheric delays that remain after the application of the ionosphere-free linear combination, and takes into account secondand third-order ionospherical refraction effects, excess path due to ray bending, and increased ionosphere total electron content (TEC) along the signal path dueto ray bending.
The Impact of Eclipsing GNSS Satellites on the Precise Point Positioning
The results show that the influences of non-nominal attitudes are related to the magnitude of the PCO values, maximum yaw angle differences, the duration of maneuver, the value of the sun angle and the satellite geometric strength.


Distribution and mitigation of higher‐order ionospheric effects on precise GNSS processing
Higher‐order ionospheric effects (I2+) are one of the main limiting factors in very precise Global Navigation Satellite Systems (GNSS) processing, for applications where millimeter accuracy is
On the estimation of higher-order ionospheric effects in precise point positioning
This study investigates the feasibility of estimating slant ionospheric delay parameters accounting for both first- and second-order ionsospheric effects directly within a precise point positioning (PPP) solution and demonstrates that proper handling of the receiver DCB is critical for the PPP method to provide unbiased estimates of the position.
Impact of higher‐order ionospheric terms on GPS estimates
The modeling of 2nd and 3rd–order ionospheric correction terms is part of the optimized strategy in an ongoing reprocessing project dealing with a global GPS network and spanning the time period from 1994 up to present time.
Ionospheric error contribution to GNSS single-frequency navigation at the 2014 solar maximum
The usage of PPP modeling allows us to quantify—for dual-frequency users—the degradation of the navigation solutions caused by noise and multipath with respect to the different ionospheric modeling solutions, and allows us, in turn, to obtain an independent assessment of the ionsospheric models.
The effect of the second order GPS ionospheric correction on receiver positions
The Global Positioning System (GPS) transmits two frequencies, allowing users to correct for the first‐order ionospheric signal group delay (or phase advance) of 1–50 m. The second‐order ionospheric
A first look at the effects of ionospheric signal bending on a globally processed GPS network
This study provides a first attempt at quantifying potential signal bending effects on the GPS reference frame, coordinates and zenith tropospheric delays (ZTDs). To do this, we homogeneously
Assessment of second- and third-order ionospheric effects on regional networks: case study in China with longer CMONOC GPS coordinate time series
Higher-order ionospheric (HOI) delays are one of the principal technique-specific error sources in precise global positioning system analysis and have been proposed to become a standard part of
Second-order ionospheric term in GPS : Implementation and impact on geodetic estimates
[1] In this paper, different aspects of the application of the second-order ionospheric term (abbreviated as I2) and its impact on geodetic estimates are studied. A method to correct the GPS