Determination of the vertical electron-density profile in ionospheric tomography: experimental results

Determination of the vertical electron-density pro®le in ionospheric tomography: experimental results

The reconstruction of the vertical electrondensity pro®le is a fundamental problem in ionospheric tomography. Lack of near-horizontal ray paths limits the information available on the vertical pro®le, so that the resultant image of electron density is biased in a horizontal sense. The vertical pro®le is of great importance as it a€ects the authenticity of the entire tomographic image. A new met...

Multiresolution Tomography of Ionospheric Electron Density

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...

Retrieving Vertical Ionospheric Electron Density Profile with an Improved Abel Inversion Algorithm

Vertical electron density profile is an important source of information on the Earth’s ionosphere. It is well known that such vertical electron density profile can be retrieved using LEO (Low Earth Orbit) satellite RO (radio occultation) data. With more and more LEO satellite data available (such as CHAMP, SAC_C, GRACE, COSMIC), the retrieved vertical electron density can be more accurate if so...

Topside ionospheric vertical electron density profile reconstruction using GPS and ionosonde data: possibilities for South Africa

Successful empirical modeling of the topside ionosphere relies on the availability of good quality measured data. The Alouette, ISIS and Intercosmos-19 satellite missions provided large amounts of topside sounder data, but with limited coverage of relevant geophysical conditions (e.g., geographic location, diurnal, seasonal and solar activity) by each individual mission. Recently, methods for i...