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dc.contributor.authorHernández Pajares, Manuel
dc.contributor.authorAragón Ángel, María Ángeles
dc.contributor.authorDefraigne, Pascale
dc.contributor.authorBergeot, Nicolas
dc.contributor.authorPrieto Cerdeira, Roberto
dc.contributor.authorGarcía Rigo, Alberto
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Matemàtica Aplicada IV
dc.identifier.citationHernandez, M. [et al.]. Distribution and mitigation of higher-order ionospheric effects on precise GNSS processing. "Journal of geophysical research B: solid earth", Abril 2014, vol. 119, núm. 4, p. 3823-3837.
dc.description.abstractHigher-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 demanded. This paper summarizes a comprehensive study of the I2+ effects in range and in GNSS precise products such as receiver position and clock, tropospheric delay, geocenter offset, and GNSS satellite position and clock. All the relevant higher-order contributions are considered: second and third orders, geometric bending, and slant total electron content (dSTEC) bending (i.e., the difference between the STEC for straight and bent paths). Using a realistic simulation with representative solar maximum conditions on GPS signals, both the effects and mitigation errors are analyzed. The usage of the combination of multifrequency L band observations has to be rejected due to its increased noise level. The results of the study show that the main two effects in range are the second-order ionospheric and dSTEC terms, with peak values up to 2 cm. Their combined impacts on the precise GNSS satellite products affects the satellite Z coordinates (up to +1 cm) and satellite clocks (more than ±20 ps). Other precise products are affected at the millimeter level. After correction the impact on all the precise GNSS products is reduced below 5 mm. We finally show that the I2+ impact on a Precise Point Positioning (PPP) user is lower than the current uncertainties of the PPP solutions, after applying consistently the precise products (satellite orbits and clocks) obtained under I2+ correction
dc.format.extent15 p.
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Spain
dc.subjectÀrees temàtiques de la UPC::Matemàtiques i estadística::Matemàtica aplicada a les ciències
dc.subject.otherhigher order ionospheric effects
dc.subject.otherprecise geodesy based on GNSS data
dc.subject.otherprecise ionospheric modeling of GNSS observations
dc.titleDistribution and mitigation of higher-order ionospheric effects on precise GNSS processing
dc.contributor.groupUniversitat Politècnica de Catalunya. IonSAT - Grup de determinació Ionosfèrica i navegació per SAtèl·lit i sistemes Terrestres
dc.description.peerreviewedPeer Reviewed
dc.subject.amsClassificació AMS::86 Geophysics
dc.rights.accessOpen Access
dc.description.versionPostprint (author’s final draft)
local.citation.authorHernandez, M.; Aragon-Angel, M.A.; Defraigne, P.; Bergeot, N.; Prieto-Cerdeira, R.; Garcia-Rigo, A.
local.citation.publicationNameJournal of geophysical research B: solid earth

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