Limited-area electron concentration height profile instantaneous maps Original Research Article

Quasi-empirical 3-dimensional maps of the electron concentration in the bottom side ionosphere are established with data of seven European stations. Examples are shown for quiet and disturbed conditions. As background one of two empirical models was used: IRI 2000 or NeQuITUR. Preliminary tests show a fair agreement of measurements and mapping results. Spatial and temporal effects of irregularities are discussed.