Automatic processing of lowest observed frequencies using oblique incidence sounding data during solar x-ray flares

V. A. Ivanova; A. V. Podlesnyi; A. A. Rybkina; A. I. Poddelsky

doi:10.1117/12.2690726

17 October 2023 Automatic processing of lowest observed frequencies using oblique incidence sounding data during solar x-ray flares

V. A. Ivanova, A. V. Podlesnyi, A. A. Rybkina, A. I. Poddelsky

Author Affiliations +

Proceedings Volume 12780, 29th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics; 127807D (2023) https://doi.org/10.1117/12.2690726
Event: XXIX International Symposium "Atmospheric and Ocean Optics, Atmospheric Physics", 2023, Moscow, Russian Federation

Abstract

The paper describes a program for automatic processing of the lowest observed frequency (LOF) during solar flares, based on the analysis of oblique-incidence sounding (OIS) ionograms by summing the amplitudes to determine the useful signal area on the ionogram depending of the frequency. LOF is defined as the frequency at which the relative increment of the sums of amplitudes from the side of the lowest frequencies for the first time exceeds the level of 0.1. The operation of the program is described on the example of solar X-ray flares on February 25, 2014 and October 2, 2015.

Citation Download Citation

V. A. Ivanova, A. V. Podlesnyi, A. A. Rybkina, and A. I. Poddelsky "Automatic processing of lowest observed frequencies using oblique incidence sounding data during solar x-ray flares", Proc. SPIE 12780, 29th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 127807D (17 October 2023); https://doi.org/10.1117/12.2690726

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