Berlin 2005 – wissenschaftliches Programm

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EP: Extraterrestrische Physik

EP 18: Poster-Session I: CAWSES, Atmosph
äre und erdnaher Weltraum

EP 18.1: Poster

Freitag, 4. März 2005, 09:00–19:00, Poster TU BH

Ionospheric imaging based on the assimilation of GPS observations — •Claudia Stolle¹, Schlüter Stefan², Heise Stefan¹, Jacobi Christoph³, Jakowski Norbert², and Lühr Hermann¹ — ¹GFZ Potsdam, Telegrafenberg, 14473 Potsdam — ²Institut für Kommunikation und Navigation, DLR Neustrelitz, Kalkhorstweg 53, 17235 Neustrelitz — ³Institut für Meteorologie, Universität Leipzig, Stefanstr. 3, 04103 Leipzig

The imaging of electron density fields using ionospheric observations of the Global Positioning System (GPS) has become a rapidly developing and powerful ionospheric remote sensing method. These imaging techniques are based on the assimilation of line-of-sight measurements of Total Electron Content (TEC) along the signal paths of GPS radio waves into climatological background models of the ionospheric electron density distribution. Here, we apply a three-dimensional imaging tool, which assimilates calibrated GPS TEC observations into a combined International Reference Ionosphere/Global Core Plasma model. The GPS database consists of data from ground-based receivers and of ionospheric radio occultations realised onboard the CHAMP satellite. We will present the outcomes of validating the assimilation with independent data, and discuss assimilation results from a case study.