[1] Two different implementations of Gaussian process (GP) models are proposed to estimate the vertical total electron content (TEC) from dual frequency Global Positioning System (GPS) measurements. The model falseness of GP and neural network models are compared using daily GPS TEC data from Sutherland, South Africa, and it is shown that the proposed GP models exhibit superior model falseness....

[1] We report seismo‐ionospheric precursors of anomalous decreases in the total electron content (TEC) appearing day 5 prior to an M9.3 earthquake, the largest one in the last five decades, which occurred in Sumatra‐Andaman, Indonesia on 26 December 2004. Sequences of global ionosphere maps of the TEC derived from worldwide ground‐based receivers of the global positioning system (GPS) are used ...

Ionospheric plasma disturbances after a large tsunami can be detected by measurement of the total electron content (TEC) between a Global Positioning System (GPS) satellite and its ground-based receivers. TEC depression lasting for a few minutes to tens of minutes termed as tsunami ionospheric hole (TIH) is formed above the tsunami source area. Here we describe the quantitative relationship bet...

Abstract The total electron content (TEC) data derived from the GAIA (Ground-to-topside model of Atmosphere Ionosphere for Aeronomy) is used to study seasonal and longitudinal variation occurrence medium-scale traveling ionospheric disturbances (MSTIDs) during daytime (09:00–15:00 LT) year 2011 at eight locations in northern southern hemispheres, results are compared with ground-based Global Po...

We have conducted an experiment to evaluate the usefulness of ionospheric data produced using the Global Positioning System (GPS) for making Faraday rotation and interferometer phase corrections at the NRAO Very Large Array (VLA). Four GPS receivers were installed at the VLA site – one at the array center and one at the end of each arm. A simple ionospheric model consisting of a vertical TEC, a...

We show how it is possible to combine GPS/MET oc-cultation data with ground data collected from 100+ IGS stations to perform stochastic tomography of the ionospheric electron content with a 3D global grid of voxels extending up to 2000 km above the mean surface of the Earth, and thus produce temporal series of 3D images of the ionospheric electron content. A correlation functional approach that...