Patricia H. Doherty

TL;DR: The parameterized ionospheric model (PIM) as mentioned in this paper is a global model of theoretical ionosphere climatology based on diurnally reproducible runs of four physics-based numerical models of the ionosphere.

TL;DR: In this article, the ionospheric effects of a halo coronal mass ejection (CME) initiated on the Sun on September 20, 1999, and causing the largest magnetic storm during this month on September 22, 23, and 24, 1999 were studied through their effects on a prototype of a Global Positioning System (GPS)-based navigation system called Wide Area Augmentation System (WAAS) and their impact on global VHF/UHF communication systems.

TL;DR: In this paper, the authors used amplitude scintillation measurements of L1 (1.575MHz) signals from GPS satellites at Ascension Island (14.45° W, 7.95° S; magnetic latitude 16° S) during February-April, 1998, to compare amplitude scints with fluctuations of the total electron content (TEC).

TL;DR: In this article, a study of the distribution and dynamics of mesoscale (tens of kilometers to tens of meters) electron density irregularities in the dayside auroral region was performed at Ny Alesund, Svalbard, by measuring the effects of these irregularities on the amplitude scintillation of 250-MHz transmissions from a quasi-stationary polar satellite as well as the amplitude and phase scintillations of 1.6-GHz signals from Global Positioning System (GPS) satellites.

TL;DR: The period between late October and early November of 2003 included a series of large solar events that resulted in some of the most extreme space weather of the current solar cycle as mentioned in this paper, which can influence the performance and reliability of space-borne and ground-based technological systems.