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Polynomial surfaces are a very useful tool in order to represent the geomagnetic field over small area of the Earth's surface. Nevertheless, the method has not always been applied with enough precision, nor its limitations are considered in deta[...]texto impreso
Rodríguez Bilbao, I. ; Moreno Monge, Beatriz ; Rodríguez Caderot, Gracia ; Herraiz, M. ; Radicella, S. M. | Elsevier | 2015-01The ionosphere is one of the largest contributors to errors in GNSS positioning. Although in Precise Point Positioning (PPP) the ionospheric delay is corrected to a first order through the `iono-free combination', significant errors may still be[...]texto impreso
Magdaleno, S. ; Cueto, M. ; Herraiz, M. ; Rodríguez Caderot, Gracia ; Sardon, E. ; Rodríguez, I. | Elsevier | 2013-04Plasma depletions (or bubbles) are strong reductions in the ionospheric F-region plasma density due to the appearance of a Rayleigh-Taylor instability in the post-sunset, producing severe radio signal disruptions when crossing them. Most of the [...]texto impreso
Sánchez Cano, B. ; Radicella, S. M. ; Herraiz, M. ; Witasse, O. ; Rodríguez Caderot, Gracia | Elsevier Science B.V., Amsterdam | 2013Several models of the martian ionosphere have been developed in the last years. In this paper, a new empirical model for the dayside electron density of the martian ionosphere (primary and secondary layer), called NeMars, is described. The model[...]texto impreso
Moreno, B. ; Radicella, S. ; Lacy de, M.C. ; Herraiz, M. ; Rodríguez Caderot, Gracia | Springer-Verlag | 2011In precise point positioning (PPP), the ionospheric delay is corrected in a first-order approximation from GPS dual-frequency observations, which should eliminate almost completely the ionosphere as a source of error. However, sudden plasma dens[...]texto impreso
Rodríguez Bilbao, I. ; Radicella, S.M. ; Rodríguez Caderot, Gracia ; Herraiz, M. | American Geophysical Union | 2015Intense disturbances in the ionosphere may produce perturbations in Global Navigation Satellite Systems (GNSS) radio signals that in the most severe cases produce receiver tracking problems, which in turn impact on GNSS positioning accuracy. In [...]texto impreso
Rodríguez Bouza, Marta ; Paparini, Claudia ; Otero, Xurso ; Herraiz, M. ; Radicella, S. M. ; Abe, Oladipo E. ; Rodríguez Caderot, Gracia | Elsevier | 2017Global or regional Maps of the ionospheric Total Electron Content (TEC) are an efficient tool to monitor the delay introduced by the ionosphere in the satellite signals. Ionospheric disturbance periods are of particular interest because these co[...]texto impreso
Fernández Torres, José ; Osete, M. L. ; Herraiz, M. ; Arnoso Sampedro, J. ; Montero, Javier ; McIntosh, G. ; Camacho, A.G. ; Martin-Hernandez, F. ; Charco Romero, María ; Ruíz Martínez, Vicente Carlos ; Pallero, J. L: G. ; Pavón-Carrasco, F. J. | Instituto de Geociencias, IGEO (CSIC-UCM) | 2011This new research sub-line, part of the Research Line/Department at Institute of Geosciences “Earth Dynamics and Earth Observation”, includes the activities of four previously existing research groups: (i) Space Geodesy,Gravimetry and Geomathema[...]texto impreso
Gerrero, A. ; Palacios, J. ; Rodríguez Bouza, Marta ; Rodríguez Bilbao, I. ; Aran, A. ; Cid, C. ; Herraiz, M. ; Saiz, E. ; Rodríguez Caderot, Gracia ; Cerrato, Y. | Blackwell Publishing Ltd | 2017Midlatitude locations are unique regions exposed to both geomagnetic storm and substorm effects, which may be superposed on specific events imposing an extra handicap for the analysis and identification of the sources and triggers. We study spac[...]texto impreso
Placios, J. ; Cid, C. ; Guerrero, A. ; Saiz, E. ; Cerrato, Y. ; Rodríguez Bouza, Marta ; Rodríguez Bilbao, I. ; Herraiz, M. ; Rodríguez Caderot, Gracia | Astronomical Society of the Pacific | 2016The Spanish Space Weather Service SeNMEs, www.senores.es, is a portal created by the SRG-SW of the Universidad de Alcala, Spain, to meet societal needs of near real-time space weather services. This webpage-portal is divided in different section[...]
