Sounding of the topside ionosphere/plasmasphere based on GPS measurements from CHAMP: Initial results

Details Sounding of the topside ionosphere/plasmasphere based on GPS measurements from CHAMP: Initial results Sounding of the topside ionosphere/plasmasphere based on GPS measurements from CHAMP: Initial results

Jul 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29n..44h&link_type=abstract

Geophysical Research Letters, Volume 29, Issue 14, pp. 44-1, CiteID 1699, DOI 10.1029/2002GL014738

Physics

17

Ionosphere: Topside Ionosphere, Ionosphere: Plasma Temperature And Density, Ionosphere: Ionospheric Dynamics

Scientific paper

Beside the GPS radio occultation measurements of the troposphere and ionosphere, the CHAMP satellite tracks presently up to 8 GPS satellites simultaneously for navigation. The received dual frequency GPS signals provide valuable information on the ionization state of the topside ionosphere and plasmasphere. This paper briefly describes a new developed model assisted technique to improve the three dimensional electron density estimation above the CHAMP orbit from these GPS measurements. Application of this assimilation algorithm provides a 2-D electron density slice of the ionosphere/plasmasphere system within the CHAMP orbit plane from the CHAMP altitude up to GPS orbit heights. We estimate the accuracy of the GPS TEC calibration and perform a first validation by comparing the retrieved electron density of the ionosphere/plasmasphere slice at CHAMP altitude to simultaneous electron density measurements of the Langmuir Probe onboard CHAMP.

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