Estimating E region density profiles from radio occultation measurements assisted by IDA4D

Details Estimating E region density profiles from radio occultation measurements assisted by IDA4D Estimating E region density profiles from radio occultation measurements assisted by IDA4D

Oct 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009jgra..11410316n&link_type=abstract

Journal of Geophysical Research, Volume 114, Issue A10, CiteID A10316

Physics

5

Ionosphere: Equatorial Ionosphere, Ionosphere: Instruments And Techniques, Ionosphere: Modeling And Forecasting, Ionosphere: Plasma Temperature And Density, Ionosphere: Current Systems (2721)

Scientific paper

An alternative approach for estimating E region density profiles using radio occultation total electron content (ROTEC) measurements is presented. In this approach, the F region contribution to the measured ROTEC is removed using the estimated F region from an assimilative model of ionospheric density. E region density profiles are then obtained from a numerical inversion of the residual ROTEC, which is assumed to be the E region contribution to the ROTEC. The proposed technique has been applied to radio occultation measurements made by the Constellation Observing System for Meteorology, Ionosphere and Climate (COSMIC), while the F region specification is obtained from the Ionospheric Data Assimilation Four-Dimensional (IDA4D) algorithm. Examples of E region profiles obtained with this approach are presented and compared with nearby radar measurements at the magnetic equator. The results indicate that accurate estimates of the E region peak height and density can be obtained with this approach. This technique may be applicable to the estimation of E region conductivities with the global coverage provided by the radio occultation measurements.

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