Comparison of NeQuick G and Klobuchar Model Performances at Single-Frequency User Level

Autor: Ulrich Ngayap, Claudia Paparini, Marco Porretta, Peter Buist, Knut Stanley Jacobsen, Michael Dähnn, Natalia Hanna, Dzana Halilovic, Anna Świątek, Paulina Gajdowska

Publikováno v: Engineering Proceedings, Vol 54, Iss 1, p 7 (2023)

In this study, the NeQuick G and Klobuchar models are evaluated by monitoring performance issues related to ionosphere activity for single-frequency users. The effects of radio frequency (RF) signal propagation through the ionosphere may have a signi

Externí odkaz: https://doaj.org/article/cf219e8380b84f3fb6cfc6f7c099886f

Modeling TEC Irregularities in the Northern Hemisphere Using Empirical Orthogonal Function Method

Autor: Yaqi Jin, Wojciech Jacek Miloch, Daria Kotova, Knut Stanley Jacobsen, Đorđe Stevanovic, Lasse Boy Novock Clausen, Nicholas Ssessanga, Federico Da Dalt

We develop a climatological model for the Northern Hemisphere based on a long-term dataset (2010-2021) of the rate of change of the total electron content (TEC) index (ROTI) maps from the International GNSS Service (IGS). The IGS ROTI maps are daily

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cc79de13ddc6cd724b451ced2dae3f4f
https://doi.org/10.22541/essoar.168167136.67911863/v1

GNSS positioning error forecasting in the Arctic: ROTI and Precise Point Positioning error forecasting from solar wind measurements

Autor: Yngvild L. Andalsvik, Sébastien Rougerie, Knut Stanley Jacobsen, Vincent Fabbro

Publikováno v: Journal of Space Weather and Space Climate
Journal of Space Weather and Space Climate, EDP sciences, 2021, 11, pp.43. ⟨10.1051/swsc/2021024⟩
Journal of Space Weather and Space Climate, Vol 11, p 43 (2021)

International audience; A model forecasting ionospheric disturbances and its impact on GNSS positioning is proposed, called HAPEE (High lAtitude disturbances Positioning Error Estimator). It allows predicting ROTI index and corresponding Precise Poin

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::673e35ae9866cf767e938c74436757ee
https://doi.org/10.1051/swsc/2021024

GPS phase scintillation at high latitudes during the geomagnetic storm of 17–18 March 2015

Autor: Marcio Aquino, Yngvild L. Andalsvik, Knut Stanley Jacobsen, James M. Weygand, Evan G. Thomas, Ari Viljanen, P. T. Jayachandran, Paul Prikryl, Donald Danskin, Tibor Durgonics, Reza Ghoddousi-Fard, Kjellmar Oksavik, J. M. Ruohoniemi, Emma Spanswick, Yongliang Zhang, V. Sreeja, Martin Connors

Publikováno v: Journal of Geophysical Research: Space Physics. 121

The geomagnetic storm of 17–18 March 2015 was caused by the impacts of a coronal mass ejection and a high-speed plasma stream from a coronal hole. The high-latitude ionosphere dynamics is studied using arrays of ground-based instruments including G

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::76a0c28d527e6950af15351b5b5c24a3
https://doi.org/10.1002/2016ja023171

Ionosphere data assimilation capabilities for representing the high‐latitude geomagnetic storm event in September 2011

Autor: Yakov Cherniak, Knut Stanley Jacobsen, Boris Khattatov, Vyacheslav Khattatov, Dmitry Solomentsev, Anton Titov

Publikováno v: Journal of Geophysical Research: Space Physics. 119

Severe geomagnetic storms have a strong impact on space communication and satellite navigation systems. Forecasting the appearance of geomagnetically induced disturbances in the ionosphere is one of the urgent goals of the space weather community. Th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f46eec4ca9af441c86ab5eb162a72ea4
https://doi.org/10.1002/2014ja020248