ISO 16457 pdf download Space environment (natural and artificial) — The Earth’s ionosphere model — International reference ionosphere (IRI) model and extensions to the plasmasphere 1 Scope This document provides guidance to potential users for the specification of the global distribution ofionosphere densities and temperatures, as well as the total content of electrons in the height intervalfrom 50 km to 1 500 km.It includes and explains several options for a plasmaspheric extension of...