Open AccessAIM-E auroral ionosphere model adjustment for the regular E layer
Author(s) -
Вера Николаева,
E. Gordeev,
D. D. Rogov,
A.A. Nikolaev
Publication year - 2021
Publication title -
solnečno-zemnaâ fizika
Language(s) - English
Resource type - Journals
ISSN - 2712-9640
DOI - 10.12737/szf-71202106
Subject(s) - extreme ultraviolet lithography , ionosphere , daytime , electron density , physics , computational physics , depth sounding , extreme ultraviolet , radiation , photoionization , atmospheric sciences , electron , astrophysics , geophysics , optics , geology , ionization , ion , laser , oceanography , quantum mechanics
The E-Region Auroral Ionosphere Model (AIM-E) was developed to determine the chemical composition and electron density in the auroral zone at E-layer heights (90–150 km). Solar and magnetic activity input parameters for AIM-E are the three-hour Ap index and the daily solar radio flux at a wavelength of 10.7 cm (index F10.7). In this paper, we compare AIM-E calculations of the electron density for the daytime with EUV radiation spectrum specified in two different ways: 1) the EUV spectrum theoretically calculated using the F10.7 index as an input parameter; 2) using TIMED satellite direct measurements of the EUV spectrum. We have corrected the EUVAC EUV radiation model to specify a photoionization source in AIM-E. Calculations of regular E-region critical frequencies show good agreement with the vertical sounding data from Russian high-latitude stations. Results we obtained make it possible to do a quick on-line assessment of the regular E layer, using the daily index F10.7 as an input parameter.