Ionospheric electron density profiles inverted from a spectral riometer measurement

Analysis of ionospheric electron density distribution from GPS/MET occultations

In this paper we present results from analysis of GPS/MET occultation data obtained from the University Corporation for Atmospheric Research database. We have used High-Rate occultation data to study the performance of an earlier 4D ionospheric electron content model|obtained tomographically with the use of the GPS constellation|with satisfactory results. In addition, we have processed UCAR Lev...

Multiresolution Tomography of Ionospheric Electron Density

Tomographic Reconstruction of the Ionospheric Electron Density in term of Wavelets

Ionospheric tomography is a method to investigate the ionospheric electron density in two or three dimensions. In this study, the function-based tomographic technique has been used for regional reconstruction of a 3D tomographic model of the ionospheric electron density using the GPS measurements of the Iranian Permanent GPS Network. Two-dimensional Haar wavelets and empirical orthogonal functi...

The estimation of D-region electron densities from riometer data

At high latitude the hard electron precipitation associated with auroral activity is a major source of ionization for the D-region, one consequence being the absorption of radio waves. Direct measurements of the D-region electron density are not readily available, however. This paper investigates the relationship between the electron density at altitudes between 100 and 70 km and the total radi...

Tomography of the ionospheric electron density with geostatistical inversion

In relation to satellite applications like global navigation satellite systems (GNSS) and remote sensing, the electron density distribution of the ionosphere has significant influence on trans-ionospheric radio signal propagation. In this paper, we develop a novel ionospheric tomography approach providing the estimation of the electron density’s spatial covariance and based on a best linear unb...