Fejer, B. G.Kelley, M. C.Senior, C.De la Beaujardiere, O.Holt, J. A.Tepley, C. A.Burnside, R.Abdu, M. A.Sobral, J. H. A.Woodman Pollitt, Ronald FranciscoKamide, Y.Lepping, R.2018-07-062018-07-061990-03Fejer, B. G., Kelley, M. C., Senior, C., De la Beaujardiere, O., Holt, J. A., Tepley, C. A., ... Lepping, R. (1990). Low‐ and mid‐latitude ionospheric electric fields during the January 1984 GISMOS Campaign.==$Journal of Geophysical Research: Space Physics, 95$==(A3), 2367-2377. https://doi.org/10.1029/JA095iA03p02367http://hdl.handle.net/20.500.12816/1747An 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.application/pdfenginfo:eu-repo/semantics/restrictedAccessIonosphereElectric fieldsF RegionPlasmainfo:eu-repo/semantics/articlehttp://purl.org/pe-repo/ocde/ford#1.05.01Journal of Geophysical Research: Space Physicshttps://doi.org/10.1029/JA095iA03p02367