Imaging of the equatorial ionosphere

M Materassi, C N Mitchell

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The equatorial anomaly is the dominant structure in free electron concentration in the tropical ionosphere. Due to its edges (crests) which are characterised by steep latitudinal gradients in TEC and are temporally and spatially variable, it is one of the ionospheric regions most difficult to image with inversion methods. In this paper we reconstruct an International Reference Ionosphere model of the equatorial ionosphere by employing a grid of virtual ground GPS receivers and actual GPS satellite positions. The MIDAS algorithm, an inversion method for reconstructing the ionosphere as a linear composition of given empirical orthogonal functions, is used. Comparing the true model ionosphere with the resulting images a fine tuning of the basis functions (vertical profile contraints) in the inversion is realised.
Original languageEnglish
Pages (from-to)477-482
Number of pages6
JournalAnnals of Geophysics
Volume48
Issue number3
Publication statusPublished - 2005

Fingerprint Dive into the research topics of 'Imaging of the equatorial ionosphere'. Together they form a unique fingerprint.

  • Cite this