INCLUDING AURORAL OVAL BOUNDARIES IN THE IRI MODEL

At the last International Reference Ionosphere (IRI) Workshop it was decided that future editions of the model should include a representation of the amoral oval boundaries. In this paper we review the different existing parameterizations of the amoral oval discussing their data base, boundary criteria, mathematical formulation, and overall usefulness for IRI. As a first candidate for incorporation into IRI we recommend the parameterization of the Feldstein /1/ ovals by Holzworth and Meng /2/. Ways of implementing this model into IRI are discussed. We will also address adjustability with user-provided boundaries or boundary-related parameters, to better support storm-related studies.