[1] With the advent of the Global Positioning System (GPS) measurements (from both ground-based and satellite-based receivers), the number of available ionospheric measurements has dramatically increased. Total electron content (TEC) measurements from GPS instruments augment observations from more traditional ionospheric instruments like ionospheric sounders and Langmuir probes. This volume of ...

Global magnetohydrodynamic (MHD) simulations of the Earth's magnetosphere must be coupled with a dynamical ionospheric module in order to give realistic results. The usual approach is to compute the ®eld-aligned current (FAC) from the magnetospheric MHD variables at the ionospheric boundary. The ionospheric potential is solved from an elliptic equation using the FAC as a source term. The plasma...

The technique of the orthogonal projection of ionosphere electronic content variations for mapping total electron content (TEC) allows us to visualize ionospheric irregularities. For the reconstruction of global ionospheric characteristics, numerous global navigation satellite system (GNSS) receivers located in different regions of the Earth are used as sensors. We used dense GNSS networks in c...

It is recently recognized that the ionosphere is very sensitive to seismic effects, and the detection of ionospheric perturbations associated with earthquakes, seems to be very promising for short-term earthquake prediction. We have proposed a possible use of VLF/LF (very low frequency (3-30 kHz) /low frequency (30-300 kHz)) radio sounding of the seismo-ionospheric perturbations. A brief histor...

This work presents a procedure to assess ionospheric models tailored for Global Navigation Satellite System (GNSS) applications. The test is based on actual carrier-phase measurements. Using this strategy, the accuracy of the ionospheric broadcast models for Global Positioning System (GPS), Galileo and the European Geostationary Navigation Overlay System (EGNOS) is assessed. These models are co...

10.30 Introduction – Richard Holme 10.35 The Swarm Magnetic Mission, Roger Haagmans, ESA 11.00 Achievements in Characterising Ionospheric and Magnetospheric Fields, Hermann Lühr, GFZ Potsdam. 11.30 Modelling the recent geomagnetic field using satellite and ground magnetic observations – lessons learned from Ørsted and CHAMP and prospects for SWARM, Nils Olsen, DTU Space, Copenhagen. 12.00 Oppor...

[1] We investigate the ion population and energy distribution within Ganymede’s magnetosphere by examining Ganymede’s ionospheric outflow as a source of heavy (O) and light (H) ions and the Jovian magnetospheric plasma as an external source of heavy ions. We develop a method for examining the energy distributions of each ion species in a three-dimensional multifluid simulation in a way directly...

[1] Experiments at the ionospheric heating facility of the High Frequency Active Auroral Research Program (HAARP) are performed employing dual HF beams amplitude modulated at ELF/VLF with a phase offset between the two modulation waveforms. The amplitude of the observed ELF/VLF waves is strongly dependent on the imposed ELF/VLF phase offset, the modulation waveform, and the orientation of the H...

Ionospheric anomalies, which may occur during severe ionospheric storms, could pose integrity threats to Ground-based Augmentation System (GBAS) users [1], [2], [3]. The ionospheric threat for a Local Area Augmentation System (LAAS), a GBAS developed by the U.S. Federal Aviation Administration (FAA), was modeled as a spatially linear, semi-infinite “front” (like a weather front) with constant p...

Large spatial variations in ionospheric delay of Global Navigation Satellite System signals observed during severe ionospheric storms pose potential threats to the integrity of the Ground-Based Augmentation System, which supports aircraft precision approaches and landing. Range-domain monitoring within the Ground-Based Augmentation System ground facility cannot completely eliminate all possible...