Francisco Azpilicueta

TL;DR: The conclusions achieved are: (1) the levelled carrier-phase ionospheric observable is affected by a systematic error, produced by code-delay multi-path through the levelling procedure; and (2) receiver IFB may experience significant changes during 1 day.

TL;DR: In this paper, the authors assess the accuracy of inter-frequency bias estimation techniques based on the single layer model for different ionospheric regions (low, mid and high magnetic latitude); different seasons (summer and winter solstices and spring and autumn equinoxes); different solar activity levels (high and low); and different geomagnetic conditions (quiet and very disturbed).

TL;DR: The results show that the arc-by-arc calibration technique performs better than the satellite- by-satellite one for mid-latitudes, while the opposite happens for low-latitude.

TL;DR: In this article, the NeQuick ionosphere electron density model was adapted to GPS-derived Total Electron Content (TEC) data and ionosonde measured peak parameters values.

TL;DR: In this article, the La Plata ionospheric model (LPIM) was updated to use modip latitude instead of the geomagnetic one, which significantly improved the agreement between GPS and Topex.